NetCDF  4.6.1
RELEASE_NOTES.md
1 Release Notes {#RELEASE_NOTES}
2 =============
3 
4 \brief Release notes file for the netcdf-c package.
5 
6 This file contains a high-level description of this package's evolution. Releases are in reverse chronological order (most recent first). Note that, as of netcdf 4.2, the `netcdf-c++` and `netcdf-fortran` libraries have been separated into their own libraries.
7 
8 ## 4.6.1 - March 19, 2018
9 
10 * [Bug Fix] Corrected an issue which could result in a dap4 failure. See [Github #888](https://github.com/Unidata/netcdf-c/pull/888) for more information.
11 * [Bug Fix][Enhancement] Allow `nccopy` to control output filter suppresion. See [Github #894](https://github.com/Unidata/netcdf-c/pull/894) for more information.
12 * [Enhancement] Reverted some new behaviors that, while in line with the netCDF specification, broke existing workflows. See [Github #843](https://github.com/Unidata/netcdf-c/issues/843) for more information.
13 * [Bug Fix] Improved support for CRT builds with Visual Studio, improves zlib detection in hdf5 library. See [Github #853](https://github.com/Unidata/netcdf-c/pull/853) for more information.
14 * [Enhancement][Internal] Moved HDF4 into a distinct dispatch layer. See [Github #849](https://github.com/Unidata/netcdf-c/pull/849) for more information.
15 
16 ## 4.6.0 - January 24, 2018
17 * [Enhancement] Full support for using HDF5 dynamic filters, both for reading and writing. See the file docs/filters.md.
18 * [Enhancement] Added an option to enable strict null-byte padding for headers; this padding was specified in the spec but was not enforced. Enabling this option will allow you to check your files, as it will return an E_NULLPAD error. It is possible for these files to have been written by older versions of libnetcdf. There is no effective problem caused by this lack of null padding, so enabling these options is informational only. The options for `configure` and `cmake` are `--enable-strict-null-byte-header-padding` and `-DENABLE_STRICT_NULL_BYTE_HEADER_PADDING`, respectively. See [Github #657](https://github.com/Unidata/netcdf-c/issues/657) for more information.
19 * [Enhancement] Reverted behavior/handling of out-of-range attribute values to pre-4.5.0 default. See [Github #512](https://github.com/Unidata/netcdf-c/issues/512) for more information.
20 * [Bug] Fixed error in tst_parallel2.c. See [Github #545](https://github.com/Unidata/netcdf-c/issues/545) for more information.
21 * [Bug] Fixed handling of corrupt files + proper offset handling for hdf5 files. See [Github #552](https://github.com/Unidata/netcdf-c/issues/552) for more information.
22 * [Bug] Corrected a memory overflow in `tst_h_dimscales`, see [Github #511](https://github.com/Unidata/netcdf-c/issues/511), [Github #505](https://github.com/Unidata/netcdf-c/issues/505), [Github #363](https://github.com/Unidata/netcdf-c/issues/363) and [Github #244](https://github.com/Unidata/netcdf-c/issues/244) for more information.
23 
24 ## 4.5.0 - October 20, 2017
25 
26 * Corrected an issue which could potential result in a hang while using parallel file I/O. See [Github #449](https://github.com/Unidata/netcdf-c/pull/449) for more information.
27 * Addressed an issue with `ncdump` not properly handling dates on a 366 day calendar. See [GitHub #359](https://github.com/Unidata/netcdf-c/issues/359) for more information.
28 
29 ### 4.5.0-rc3 - September 29, 2017
30 
31 * [Update] Due to ongoing issues, native CDF5 support has been disabled by **default**. You can use the options mentioned below (`--enable-cdf5` or `-DENABLE_CDF5=TRUE` for `configure` or `cmake`, respectively). Just be aware that for the time being, Reading/Writing CDF5 files on 32-bit platforms may result in unexpected behavior when using extremely large variables. For 32-bit platforms it is best to continue using `NC_FORMAT_64BIT_OFFSET`.
32 * [Bug] Corrected an issue where older versions of curl might fail. See [GitHub #487](https://github.com/Unidata/netcdf-c/issues/487) for more information.
33 * [Enhancement] Added options to enable/disable `CDF5` support at configure time for autotools and cmake-based builds. The options are `--enable/disable-cdf5` and `ENABLE_CDF5`, respectively. See [Github #484](https://github.com/Unidata/netcdf-c/issues/484) for more information.
34 * [Bug Fix] Corrected an issue when subsetting a netcdf3 file via `nccopy -v/-V`. See [Github #425](https://github.com/Unidata/netcdf-c/issues/425) and [Github #463](https://github.com/Unidata/netcdf-c/issues/463) for more information.
35 * [Bug Fix] Corrected `--has-dap` and `--has-dap4` output for cmake-based builds. See [GitHub #473](https://github.com/Unidata/netcdf-c/pull/473) for more information.
36 * [Bug Fix] Corrected an issue where `NC_64BIT_DATA` files were being read incorrectly by ncdump, despite the data having been written correctly. See [GitHub #457](https://github.com/Unidata/netcdf-c/issues/457) for more information.
37 * [Bug Fix] Corrected a potential stack buffer overflow. See [GitHub #450](https://github.com/Unidata/netcdf-c/pull/450) for more information.
38 
39 ### 4.5.0-rc2 - August 7, 2017
40 
41 * [Bug Fix] Addressed an issue with how cmake was implementing large file support on 32-bit systems. See [GitHub #385](https://github.com/Unidata/netcdf-c/issues/385) for more information.
42 * [Bug Fix] Addressed an issue where ncgen would not respect keyword case. See [GitHub #310](https://github.com/Unidata/netcdf-c/issues/310) for more information.
43 
44 ### 4.5.0-rc1 - June 5, 2017
45 
46 * [Enhancement] DAP4 is now included. Since dap2 is the default for urls, dap4 must be specified by
47 (1) using "dap4:" as the url protocol, or
48 (2) appending "#protocol=dap4" to the end of the url, or
49 (3) appending "#dap4" to the end of the url
50 Note that dap4 is enabled by default but remote-testing is
51 disbled until the testserver situation is resolved.
52 * [Enhancement] The remote testing server can now be specified with the `--with-testserver` option to ./configure.
53 * [Enhancement] Modified netCDF4 to use ASCII for NC_CHAR. See [Github Pull request #316](https://github.com/Unidata/netcdf-c/pull/316) for more information.
54 * [Bug Fix] Corrected an error with how dimsizes might be read. See [Github #410](https://github.com/unidata/netcdf-c/issues/410) for more information.
55 * [Bug Fix] Corrected an issue where 'make check' would fail if 'make' or 'make all' had not run first. See [Github #339](https://github.com/Unidata/netcdf-c/issues/339) for more information.
56 * [Bug Fix] Corrected an issue on Windows with Large file tests. See [Github #385](https://github.com/Unidata/netcdf-c/issues/385]) for more information.
57 * [Bug Fix] Corrected an issue with diskless file access, see [Pull Request #400](https://github.com/Unidata/netcdf-c/issues/400) and [Pull Request #403](https://github.com/Unidata/netcdf-c/issues/403) for more information.
58 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
59 * [Upgrade] The bash based test scripts have been upgraded to use a common test_common.sh include file that isolates build specific information.
60 * [Refactor] the oc2 library is no longer independent of the main netcdf-c library. For example, it now uses ncuri, nclist, and ncbytes instead of its homegrown equivalents.
61 * [Bug Fix] `NC_EGLOBAL` is now properly returned when attempting to set a global `_FillValue` attribute. See [GitHub #388](https://github.com/Unidata/netcdf-c/issues/388) and [GitHub #389](https://github.com/Unidata/netcdf-c/issues/389) for more information.
62 * [Bug Fix] Corrected an issue where data loss would occur when `_FillValue` was mistakenly allowed to be redefined. See [Github #390](https://github.com/Unidata/netcdf-c/issues/390), [GitHub #387](https://github.com/Unidata/netcdf-c/pull/387) for more information.
63 * [Upgrade][Bug] Corrected an issue regarding how "orphaned" DAS attributes were handled. See [GitHub #376](https://github.com/Unidata/netcdf-c/pull/376) for more information.
64 * [Upgrade] Update utf8proc.[ch] to use the version now maintained by the Julia Language project (https://github.com/JuliaLang/utf8proc/blob/master/LICENSE.md).
65 * [Bug] Addressed conversion problem with Windows sscanf. This primarily affected some OPeNDAP URLs on Windows. See [GitHub #365](https://github.com/Unidata/netcdf-c/issues/365) and [GitHub #366](https://github.com/Unidata/netcdf-c/issues/366) for more information.
66 * [Enhancement] Added support for HDF5 collective metadata operations when available. Patch submitted by Greg Sjaardema, see [Pull request #335](https://github.com/Unidata/netcdf-c/pull/335) for more information.
67 * [Bug] Addressed a potential type punning issue. See [GitHub #351](https://github.com/Unidata/netcdf-c/issues/351) for more information.
68 * [Bug] Addressed an issue where netCDF wouldn't build on Windows systems using MSVC 2012. See [GitHub #304](https://github.com/Unidata/netcdf-c/issues/304) for more information.
69 * [Bug] Fixed an issue related to potential type punning, see [GitHub #344](https://github.com/Unidata/netcdf-c/issues/344) for more information.
70 * [Enhancement] Incorporated an enhancement provided by Greg Sjaardema, which may improve read/write times for some complex files. Basically, linked lists were replaced in some locations where it was safe to use an array/table. See [Pull request #328](https://github.com/Unidata/netcdf-c/pull/328) for more information.
71 
72 ## 4.4.1.1 - November 21, 2016
73 
74 * [Bug] Fixed an issue where `ncgen` would potentially crash or write incorrect netCDF4 binary data under very specific circumstances. This bug did *not* affect data written on 32-bit systems or by using the netCDF library; it was specific to `ncgen`. This would only happen when writing a compound data type containing an 8-byte data type followed by a 4-byte data type *and* the 4-byte data type was not properly aligned; this would *possibly* result in incorrect padding. This did not affect 32-bit systems, or data written directly by the library. See [GitHub #323](https://github.com/Unidata/netcdf-c/issues/323) for more information.
75 * [Documentation] Updated documentation related to netCDF variable names and DAP2 access to reflect the undefined behavior potentially observed when DAP2 reserved keywords are used as netCDF variable names. See [GitHub #308](https://github.com/Unidata/netcdf-c/issues/308) for more information.
76 * [Bug] Fixed an issue with `nc_inq_type()` not returning proper value in some circumstances. See [GitHub #317](https://github.com/Unidata/netcdf-c/issues/317) for more information.
77 * [Bug] Corrected an issue related to test failures when `--disable-utilities` or `-DENABLE_UTILITIES=OFF` are specified when building with autotools or cmake, respectively. See [GitHub #313](https://github.com/Unidata/netcdf-c/issues/313) for more information.
78 * [Bug][Enhancement] Corrected a behavioral issue with the `_NCProperties` attribute taking up too much space. See [GitHub #300](https://github.com/Unidata/netcdf-c/issues/300) and [GitHub #301](https://github.com/Unidata/netcdf-c/pull/301) for more information.
79 
80 * [Bug] Corrected behavior for `nc-config` so that, if `nf-config` is found in system, the proper fortran-related information will be conveyed. See [GitHub #296](https://github.com/Unidata/netcdf-c/issues/296] for more information.
81 
82 ## 4.4.1 - June 28, 2016
83 
84 * [File Change] Starting with release 4.4.1, netCDF-4 files created will have superblock version 0 instead of superblock version 2, as was observed in previous netCDF versions. This is due to a workaround required to avoid backwards binary incompatibility when using libhdf5 1.10.x or greater. Superblock versions 0 and 2 appear to be forward and backward compatible. Other than a different superblock number the data should remain consistent.
85 * [Enhancement] Added better error reporting when ncdump/nccopy are given a bad constraint in a DAP url. See [GitHub #279](https://github.com/Unidata/netcdf-c/pull/279) for more information.
86 
87 ### 4.4.1-RC3 - June 17, 2016
88 
89 * [Bug Fix] Misc. bug fixes and improvements.
90 * [Bug Fix] Corrected an issue where adding a \_FillValue attribute to a variable would result in other attributes being lost. See [GitHub #239](https://github.com/Unidata/netcdf-c/issues/239) for more details.
91 * [Bug Fix][Parallel I/O] Corrected an issue reported by Kent Yang at the HDF group related to Collective Parallel I/O and a potential hang.
92 
93 ### 4.4.1-RC2 - May 13, 2016
94 
95 * [Enhancement] Added provenance information to files created. This information consists of a persistent attribute named `_NCProperties` plus two computed attributes, `_IsNetcdf4` and `_SuperblockVersion`. Associated documentation was added to the file `docs/attribute_conventions.md`. See [GitHub pull request #260](https://github.com/Unidata/netcdf-c/pull/260) for more information.
96 * [Bug Fix] Cleaned up some dead links in the doxygen-generated documentation.
97 * [Bug Fix] Corrected several issues related to building under Visual Studio 2014.
98 * [Bug Fix] Corrected several test failures related to HDF5 `1.10.0`
99 * [Bug Fix] Reverted SOVersion *current* to 11 from 12; it was incorrectly incremented in netCDF-C release 4.4.1-RC1.
100 * [Enhancement][Windows] Bumped the included libhdf5 to 1.8.16 from 1.8.15 for pre-built Visual Studio installer files.
101 
102 
103 ### 4.4.1-RC1 - April 15, 2016
104 
105 * [Bug Fix][Enhancement] Fixed an issue with netCDF4 files generated using version `1.10.0` of the HDF5 library. The 1.10 release potentially changed the underlying file format, introducing a backwards compatibility issue with the files generated. HDF5 provided an API for retaining the 1.8.x file format, which is now on by default. See [GitHub Issue #250](https://github.com/Unidata/netcdf-c/issues/250) for more information.
106 * [Bug Fix] Corrected an issue with autotools-based builds performed out-of-source-tree. See [GitHub Issue #242](https://github.com/Unidata/netcdf-c/issues/242) for more information.
107 * [Enhancement] Modified `nc_inq_type()` so that it would work more broadly without requiring a valid ncid. See [GitHub Issue #240](https://github.com/Unidata/netcdf-c/issues/240) for more information.
108 * [Enhancement] Accepted a patch code which added a hashmap lookup for rapid var and dim retrieval in nc3 files, contributed by Greg Sjaardema. See [GitHub Pull Request #238](https://github.com/Unidata/netcdf-c/pull/238) for more information.
109 * [Bug Fix] Accepted a contributed pull request which corrected an issue with how the cmake-generated `nc-config` file determined the location of installed files. See [GitHub Pull Request #235](https://github.com/Unidata/netcdf-c/pull/235) for more information.
110 * [Enhancement] Added an advanced option for CMake-based builds, `ENABLE_SHARED_LIBRARY_VERSION`. This option is `ON` by default, but if turned off, only `libnetcdf.dylib` will be generated, instead of files containing the SOVERSION in the file name. This is a requested feature most people might not care about. See [GitHub #228](https://github.com/Unidata/netcdf-c/issues/228) for more information.
111 * [Bug Fix] Corrected an issue with duplicated error codes defined in multiple header files. See [GitHub #213](https://github.com/Unidata/netcdf-c/issues/213) for more information.
112 * [Bug Fix] Addressed an issue specific to Visual Studio 2015 on Windows. On very large files, some calls to the `fstat` class of functions would fail for no apparent reason. This behavior was **not** observed under Visual Studio 2013. This has now been mitigated. See [GitHub #188](https://github.com/Unidata/netcdf-c/issues/188) for more information.
113 * [Enhancement] Updated `nc-config` to report whether `logging` is enabled in netcdf. Additionally, if `f03` is available in an installed netcdf-fortran library, it will now be reported as well.
114 * [Bug Fix] Addressed an issue where `netcdf_mem.h` was not being installed by cmake. See [GitHub #227](https://github.com/Unidata/netcdf-c/issues/227) for more information.
115 * [Bug Fix] Addressed an issue where `ncdump` would crash when trying to read a netcdf file containing an empty ragged `VLEN` variable in an unlimited dimension. See [GitHub #221](https://github.com/Unidata/netcdf-c/issues/221) for more information.
116 
117 ## 4.4.0 Released - January 13, 2016
118 
119 * Bumped SO version to 11.0.0.
120 
121 * Modified `CMakeLists.txt` to work with the re-organized cmake configuration used by the latest HDF5, `1.8.16`, on Windows. Before this fix, netCDF would fail to locate hdf5 1.8.16 when using cmake on Windows. See [GitHub #186](https://github.com/Unidata/netcdf-c/issues/186) for more information.
122 
123 * Addressed an issue with `ncdump` when annotations were used. The indices for the last row suffered from an off-by-1 error. See [GitHub issue #181](https://github.com/Unidata/netcdf-c/issues/181) for more information.
124 
125 * Addressed an issue on platforms where `char` is `unsigned` by default (such as `ARM`), as well as an issue describing regarding undefined behavior, again on `ARM`. See [GitHub issue #159](https://github.com/Unidata/netcdf-c/issues/159) for detailed information.
126 
127 * Fixed an ambiguity in the grammar for cdl files. See [GitHub #178](https://github.com/Unidata/netcdf-c/issues/178) for more information.
128 
129 * Updated documentation for `nc_get_att_string()` to reflect the fact that it returns allocated memory which must be explicitly free'd using `nc_free_string()`. Reported by Constantine Khroulev, see [GitHub Issue 171](https://github.com/Unidata/netcdf-c/issues/171) for more information.
130 
131 * Modified ncgen to properly handle the L and UL suffixes for integer constants
132  to keep backward compatibility. Now it is the case the single L suffix
133  (e.g. 111L) is treated as a 32 bit integer. This makes it consistent with
134  the fact that NC_LONG (netcdf.h) is an alias for NC_INT. Existing .cdl
135  files should be examined for occurrences of the L prefix to ensure that
136  this change will not affect them.
137  (see Github issue 156[https://github.com/Unidata/netcdf-c/issues/156]).
138 
139 * Updated documentation to reference the new `NodeJS` interface to netcdf4, by Sven Willner. It is available from [https://www.npmjs.com/package/netcdf4](https://www.npmjs.com/package/netcdf4) or from the GitHub repository at [https://github.com/swillner/netcdf4-js](https://github.com/swillner/netcdf4-js).
140 
141 * Incorporated pull request https://github.com/Unidata/netcdf-c/pull/150 from Greg Sjaardema to remove the internal hard-wired use of `NC_MAX_DIMS`, instead using a dynamic memory allocation.
142 
143 ### 4.4.0-RC5 Released - November 11, 2015
144 
145 * Added a fix for https://github.com/Unidata/netcdf-c/issues/149, which was reported several times in quick succession within an hour of the RC4 release.
146 
147 ### 4.4.0-RC4 Released - November 10, 2015
148 
149 * Added CDM-5 support via new mode flag called NC_64BIT_DATA (alias NC_CDF5).
150 
151  Major kudos to Wei-Keng Liao for all the effort he put into getting this to work.
152 
153  This cascaded into a number of other changes.
154 
155  1. Renamed libsrcp5 -> libsrcp because pnetcdf can do parallel io for CDF-1, CDF-2 and CDF-5, not just CDF-5.
156  2. Given #1, then the NC_PNETCDF mode flag becomes a subset of NC_MPIIO, so made NC_PNETCDF an alias for NC_MPII.
157  3. NC_FORMAT_64BIT is now deprecated. Use NC_FORMAT_64BIT_OFFSET.
158 
159 Further information regarding the CDF-5 file format specifrication may be found here: http://cucis.ece.northwestern.edu/projects/PnetCDF/CDF-5.html
160 
161 * Modified configure.ac to provide finer control over parallel
162  support. Specifically, add flags for:
163 
164  1. HDF5_PARALLEL when hdf5 library has parallel enabled
165  2. --disable-parallel4 to be used when we do not want
166  netcdf-4 to use parallelism even if hdf5 has it enabled.
167 
168 
169 * Deprecating various extended format flags.
170 
171 The various extended format flags of the format `NC_FORMAT_FOO` have been refactored into the form `NC_FORMATX_FOO`. The old flags still exist but have been marked as deprecated and will be removed at some point. This was done to avoid confusion between the extended format flags and the format flags `NC_FORMAT_CLASSIC`, `NC_FORMAT_64BIT_OFFSET`, etc. The mapping of deprecated-to-new flags is as follows:
172 
173 Deprecated | Replaced with
174 -----------|-------------
175 NC\_FORMAT\_NC3 | NC\_FORMATX\_NC3
176 NC\_FORMAT\_NC\_HDF5 | NC\_FORMATX\_NC\_HDF5
177 NC\_FORMAT\_NC4 | NC\_FORMATX\_NC4
178 NC\_FORMAT\_NC\_HDF4 | NC\_FORMATX\_NC\_HDF4
179 NC\_FORMAT\_PNETCDF | NC\_FORMATX\_PNETCDF
180 NC\_FORMAT\_DAP2 | NC\_FORMATX\_DAP2
181 NC\_FORMAT\_DAP4 | NC\_FORMATX\_DAP4
182 NC\_FORMAT\_UNDEFINED | NC\_FORMATX\_UNDEFINED
183 
184 * Reduced minimum cmake version to `2.8.11` from `2.8.12`. This will allow for cmake use on a broader set of popular linux platforms without having to do a custom cmake install. See https://github.com/Unidata/netcdf-c/issues/135 for more information.
185 
186 * The documentation section `The Default Chunking Scheme` has been updated with more information. This lives in the `guide.dox` file in the `docs/` directory, or can be found online in the appropriate location (typically http://www.unidata.ucar.edu/netcdf/docs/), once this release has been published.
187 
188 ### 4.4.0-RC3 2015-10-08
189 
190 * Addressed an inefficiency in how bytes would be swapped when converting between `LITTLE` and `BIG` ENDIANNESS. See [NCF-338](https://bugtracking.unidata.ucar.edu/browse/NCF-338) for more information.
191 
192 * Addressed an issue where an interrupted read on a `POSIX` system would return an error even if errno had been properly set to `EINTR`. This issue was initially reported by David Knaak at Cray. More information may be found at [NCF-337](https://bugtracking.unidata.ucar.edu/browse/NCF-337).
193 
194 * Added a note to the install directions pointing out that parallel make
195 cannot be used for 'make check'.
196 
197 ### 4.4.0-RC2 Released 2015-07-09
198 
199 * Minor bug fixes and cleanup of issues reported with first release candidate.
200 
201 ### 4.4.0-RC1 Released 2015-06-09
202 
203 * The pre-built Windows binaries are now built using `Visual Studio 2012`, instead of `Visual Studio 2010`. Source-code compilation remains function with `Visual Studio 2010`, this is just a change in the pre-built binaries.
204 
205 * Added support for opening in-memory file content. See `include/netcdf_mem.h` for the procedure signature. Basically, it allows one to fill a chunk of memory with the equivalent of some netCDF file and then open it and read from it as if it were any other file. See [NCF-328](https://bugtracking.unidata.ucar.edu/browse/NCF-328) for more information.
206 
207 * Addressed an issue when reading hdf4 files with explicit little-endian datatypes. This issue was [reported by Tim Burgess at GitHub](https://github.com/Unidata/netcdf-c/issues/113). See [NCF-332](https://bugtracking.unidata.ucar.edu/browse/NCF-332) for more information.
208 
209 * Addressed an issue with IBM's `XL C` compiler on AIX and how it handled some calls to malloc. Also, as suggested by Wolfgang Hayek, developers using this compiler may need to pass `CPPFLAGS=-D_LINUX_SOURCE_COMPAT` to avoid some test failures.
210 
211 * Addressed an issure in netcdf4 related to specifying an endianness explicitly. When specifying an endianness for `NC_FLOAT`, the value would appear to not be written to file, if checked with `ncdump -s`. The issue was more subtle; the value would be written but was not being read from file properly for non-`NC_INT`. See [GitHub Issue](https://github.com/Unidata/netcdf-c/issues/112) or [NCF-331](https://bugtracking.unidata.ucar.edu/browse/NCF-331) for more information.
212 
213 * Addressed an issue in netcdf4 on Windows w/DAP related to how byte values were copied with sscanf. Issue originally reported by Ellen Johnson at Mathworks, see [NCF-330](https://bugtracking.unidata.ucar.edu/browse/NCF-330) for more information.
214 
215 * Addressed in issue in netcdf4 files on Windows, built with Microsoft Visual Studio, which could result in a memory leak. See [NCF-329](https://bugtracking.unidata.ucar.edu/browse/NCF-329) for more information.
216 
217 * Addressed an issue in netcdf4 files where writing unlimited dimensions that were not declared at head of the dimensions list, as reported by Ellen Johnson at Mathworks. See [NCF-326](https://bugtracking.unidata.ucar.edu/browse/NCF-326) for more information.
218 
219 * Added an authorization reference document as oc2/ocauth.html.
220 
221 * Fixed bug resulting in segmentation violation when trying to add a
222  _FillValue attribute to a variable in an existing netCDF-4 file
223  defined without it (thanks to Alexander Barth). See
224  [NCF-187](https://bugtracking.unidata.ucar.edu/browse/NCF-187) for
225  more information.
226 
227 ## 4.3.3.1 Released 2015-02-25
228 
229 * Fixed a bug related to renaming the attributes of coordinate variables in a subgroup. See [NCF-325](https://bugtracking.unidata.ucar.edu/browse/NCF-325) for more information.
230 
231 ## 4.3.3 Released 2015-02-12
232 
233 * Fixed bug resulting in error closing a valid netCDF-4 file with a dimension and a non-coordinate variable with the same name. [NCF-324](https://bugtracking.unidata.ucar.edu/browse/NCF-324)
234 
235 * Enabled previously-disabled shell-script-based tests for Visual Studio when `bash` is detected.
236 
237 ### 4.3.3-rc3 Released 2015-01-14
238 
239 * Added functionality to make it easier to build `netcdf-fortran` as part of the `netcdf-c` build for *NON-MSVC* builds. This functionality is enabled at configure time by using the following **Highly Experimental** options:
240 
241  * CMake: `-DENABLE_REMOTE_FORTRAN_BOOTSTRAP=ON`
242  * Autotools: `--enable-remote-fortran-bootstrap`
243 
244 Details are as follows:
245 
246 ----
247 
248 Enabling these options creates two new make targets:
249 
250 * `build-netcdf-fortran`
251 * `install-netcdf-fortran`
252 
253 Example Work Flow from netcdf-c source directory:
254 
255 * $ `./configure --enable-remote-fortran-bootstrap --prefix=$HOME/local`
256 * $ `make check`
257 * $ `make install`
258 * $ `make build-netcdf-fortran`
259 * $ `make install-netcdf-fortran`
260 
261 > These make targets are **only** valid after `make install` has been invoked. This cannot be enforced rigidly in the makefile for reasons we will expand on in the documentation, but in short: `make install` may require sudo, but using sudo will discard environmental variables required when attempting to build netcdf-fortran in this manner.<br><br>
262 
263 > It is important to note that this is functionality is for *convenience only*. It will remain possible to build `netcdf-c` and `netcdf-fortran` manually. These make targets should hopefully suffice for the majority of our users, but for corner cases it may still be required of the user to perform a manual build. [NCF-323](https://bugtracking.unidata.ucar.edu/browse/NCF-323)
264 
265 ----
266 
267 * Added a failure state if the `m4` utility is not found on non-Windows systems; previously, the build would fail when it reached the point of invoking m4.
268 
269 * Added an explicit check in the build systems (autotools, cmake) for the CURL-related option `CURLOPT_CHUNK_BGN_FUNCTION`. This option was introduced in libcurl version `7.21.0`. On installations which require libcurl and have this version, `CURLOPT_CHUNK_BGN_FUNCTION` will be available. Otherwise, it will not.
270 
271 * The pnetcdf support was not properly being used to provide mpi parallel io for netcdf-3 classic files. The wrong dispatch table was being used. [NCF-319](https://bugtracking.unidata.ucar.edu/browse/NCF-319)
272 
273 * In nccopy utility, provided proper default for unlimited dimension in chunk-size specification instead of requiring explicit chunk size. Added associated test. [NCF-321](https://bugtracking.unidata.ucar.edu/browse/NCF-321)
274 
275 * Fixed documentation typo in FILL_DOUBLE definition in classic format specification grammar. Fixed other typos and inconsistencies in Doxygen version of User Guide.
276 
277 * For nccopy and ncgen, added numeric options (-3, -4, -6, -7) for output format, to provide less confusing format version specifications than the error-prone equivalent -k options (-k1, -k2, -k3, -k4). The new numeric options are compatible with NCO's mnemonic version options. The old -k numeric options will still be accepted but are deprecated, due to easy confusion between format numbers and format names. [NCF-314](https://bugtracking.unidata.ucar.edu/browse/NCF-314)
278 
279 * Fixed bug in ncgen. When classic format was in force (k=1 or k=4), the "long" datatype should be treated as int32. Was returning an error. [NCF-318](https://bugtracking.unidata.ucar.edu/browse/NCF-318)
280 
281 * Fixed bug where if the netCDF-C library is built with the HDF5 library but without the HDF4 library and one attempts to open an HDF4 file, an abort occurs rather than returning a proper error code (NC_ENOTNC). [NCF-317](https://bugtracking.unidata.ucar.edu/browse/NCF-317)
282 
283 * Added a new option, `NC_EXTRA_DEPS`, for cmake-based builds. This is analogous to `LIBS` in autotools-based builds. Example usage:
284 
285  $ cmake .. -NC_EXTRA_DEPS="-lcustom_lib"
286 
287 More details may be found at the Unidata JIRA Dashboard. [NCF-316](https://bugtracking.unidata.ucar.edu/browse/NCF-316)
288 
289 
290 ### 4.3.3-rc2 Released 2014-09-24
291 
292 * Fixed the code for handling character constants
293  in datalists in ncgen. Two of the problems were:
294  1. It failed on large constants
295  2. It did not handle e.g. var = 'a', 'b', ...
296  in the same way that ncgen3 did.
297  See [NCF-309](https://bugtracking.unidata.ucar.edu/browse/NCF-309).
298 
299 * Added a new file, `netcdf_meta.h`. This file is generated automatically at configure time and contains information related to the capabilities of the netcdf library. This file may be used by projects dependent upon `netcdf` to make decisions during configuration, based on how the `netcdf` library was built. The macro `NC_HAVE_META_H` is defined in `netcdf.h`. Paired with judicious use of `ifdef`'s, this macro will indicate to developers whether or not the meta-header file is present. See [NCF-313](https://bugtracking.unidata.ucar.edu/browse/NCF-313).
300 
301  > Determining the presence of `netcdf_meta.h` can also be accomplished by methods common to autotools and cmake-based build systems.
302 
303 * Changed `Doxygen`-generated documentation hosted by Unidata to use more robust server-based searching.
304 * Corrected embedded URLs in release notes.
305 * Corrected an issue where building with HDF4 support with Visual Studio would fail.
306 
307 ### 4.3.3-rc1 Released 2014-08-25
308 
309 * Added `CMake`-based export files, contributed by Nico Schlömer. See https://github.com/Unidata/netcdf-c/pull/74.
310 
311 * Documented that ncgen input can come from standard input.
312 
313 * Regularized generation of libnetcdf.settings file to make parsing it easier.
314 
315 * Fixed ncdump bug for char variables with multiple unlimited dimensions and added an associated test. Now the output CDL properly disambiguates dimension groupings, so that ncgen can generate the original file from the CDL. [NCF-310](https://bugtracking.unidata.ucar.edu/browse/NCF-310)
316 
317 * Converted the [Manually-maintained FAQ page](http://www.unidata.ucar.edu/software/netcdf/docs/faq.html) into markdown and added it to the `docs/` directory. This way the html version will be generated when the rest of the documentation is built, the FAQ will be under version control, and it will be in a more visible location, hopefully making it easier to maintain.
318 
319 * Bumped minimum required version of `cmake` to `2.8.12`. This was necessitated by the adoption of the new `CMAKE_MACOSX_RPATH` property, for use on OSX.
320 
321 * Jennifer Adams has requested a reversion in behavior so that all dap requests include a constraint. Problem is caused by change in prefetch where if all variables are requested, then no constraint is generated. Fix is to always generate a constraint in prefetch.
322  [NCF-308](https://bugtracking.unidata.ucar.edu/browse/NCF-308)
323 
324 * Added a new option for cmake-based builds, `ENABLE_DOXYGEN_LATEX_OUTPUT`. On those systems with `make` and `pdflatex`, setting this option **ON** will result in pdf versions of the documentation being built. This feature is experimental.
325 
326 * Bumped minimum CMake version to `2.8.9` from `2.8.8` as part of a larger pull request contributed by Nico Schlömer. [Pull Request #64](https://github.com/Unidata/netcdf-c/pull/64)
327 
328 * Replaced the `NetCDF Library Architecture` image with an updated version from the 2012 NetCDF Workshop slides.
329 
330 * Fix HDF4 files to support chunking.
331  [NCF-272](https://bugtracking.unidata.ucar.edu/browse/NCF-272)
332 
333 * NetCDF creates a `libnetcdf.settings` file after configuration now, similar to those generated by `HDF4` and `HDF5`. It is installed into the same directory as the libraries. [NCF-303](https://bugtracking.unidata.ucar.edu/browse/NCF-303).
334 
335 
336 * Renamed `man4/` directory to `docs/` to make the purpose and contents clearer. See [man4 vs. docs #60](https://github.com/Unidata/netcdf-c/issues/60).
337 
338 * Removed redundant variable `BUILD_DOCS` from the CMake configuration file. See the issue at github: [#59](https://github.com/Unidata/netcdf-c/issues/59).
339 
340 * Added missing documentation templates to `man4/Makefile.am`, to correct an issue when trying to build the local `Doxygen`-generated documentation. This issue was reported by Nico Schlömer and may be viewed on github. [Releases miss Doxygen files #56](https://github.com/Unidata/netcdf-c/issues/56)
341 
342 * When the NC_MPIPOSIX flag is given for parallel I/O access and the HDF5 library does not have the MPI-POSIX VFD configured in, the NC_MPIPOSIX flag is transparently aliased to the NC_MPIIO flag within the netCDF-4 library.
343 
344 ## 4.3.2 Released 2014-04-23
345 
346 * As part of an ongoing project, the Doxygen-generated netcdf documentation has been reorganized. The goal is to make the documentation easier to parse, and to eliminate redundant material. This project is ongoing.
347 
348 * The oc .dodsrc reader was improperly handling the user name and password entries. [NCF-299](https://bugtracking.unidata.ucar.edu/browse/NCF-299)
349 
350 * CTestConfig.cmake has been made into a template so that users may easily specify the location of an alternative CDash-based Dashboard using the following two options:
351 
352  * `NC_TEST_DROP_SITE` - Specify an alternative Dashboard by URL or IP address.
353 
354  * `NC_CTEST_DROP_LOC_PREFIX` - Specify a prefix on the remote webserver relative to the root directory. This lets CTest accommodate dashboards that do not live at the top level of the web server.
355 
356 * Return an error code on open instead of an assertion violation for truncated file.
357 
358 * Documented limit on number of Groups per netCDF-4 file (32767).
359 
360 ### 4.3.2-rc2 Released 2014-04-15
361 
362 * Cleaned up a number of CMake inconsistencies related to CMake usage, parallel builds.
363 * Now passing -Wl,--no-undefined to linker when appropriate.
364 * Corrected an issue preventing large file tests from running correctly under Windows.
365 * Misc Bug Fixes detected by static analysis.
366 
367 ### 4.3.2-rc1 Released 2014-03-20
368 
369 * Pre-built Windows downloads will now be bundled with the latest (as of the time of this writing) versions of the various dependencies:
370  * `hdf5: 1.8.12`
371  * `zlib: 1.2.8`
372  * `libcurl: 7.35.0`
373 
374 * Added a separate flag to enable DAP AUTH tests. These tests are disabled by default. The flags for autotools and CMAKE-based builds are (respectively):
375  * --enable-dap-auth-tests
376  * -DENABLE\_DAP\_AUTH\_TESTS
377 
378 * Fixed small default chunk size for 1-dimensional record variables. [NCF-211](https://bugtracking.unidata.ucar.edu/browse/NCF-211)
379 
380 * Cleaned up type handling in netCDF-4 to fix bugs with fill-values.
381 
382 * Corrected "BAIL" macros to avoid infinite loop when logging is disabled and an error occurs.
383 
384 * Refactored how types are used for attributes, variables, and committed types, clarifying and categorizing fields in structs, and eliminating duplicated type information between variables and types they use.
385 
386 * Made type structure sharable by committed datatypes and variables that use it.
387 
388 * Handled string datatypes correctly, particularly for fill value attributes. Expanded testing for string fill values.
389 
390 * Simplified iteration of objects in the file when it's opened, tracking fewer objects and using less memory.
391 
392 * Enabled netCDF-4 bit-for-bit reproducibility for nccopy and other applications (thanks to Rimvydas Jasinskas and Quincey Koziol) by turning off HDF5 object creation, access, and modification time tracking. [NCF-290](https://bugtracking.unidata.ucar.edu/browse/NCF-290)
393 
394 * Addressed an issue where `cmake`-based builds would not properly create a `pkg-config` file. This file is now created properly by `cmake`. [NCF-288](https://bugtracking.unidata.ucar.edu/browse/NCF-288)
395 
396 * Addressed an issue related to old DAP servers. [NCF-287](https://bugtracking.unidata.ucar.edu/browse/NCF-287)
397 
398 * Modified nc_{get/put}_vars to no longer use
399  nc_get/put_varm. They now directly use nc_get/put_vara
400  directly. This means that nc_get/put_vars now work
401  properly for user defined types as well as atomic types.
402  [NCF-228] (https://bugtracking.unidata.ucar.edu/browse/NCF-228)
403 
404 ## 4.3.1.1 Released 2014-02-05
405 
406 This is a bug-fix-only release for version 4.3.1.
407 
408 * Corrected a DAP issue reported by Jeff Whitaker related to non-conforming servers.
409 
410 * Corrected an issue with DAP tests failing in a 64-bit Cygwin environment. [NCF-286](https://bugtracking.unidata.ucar.edu/browse/NCF-286)
411 
412 ## 4.3.1 Released 2014-01-16
413 
414 * Add an extended format inquiry method to the netCDF API: nc\_inq\_format\_extended. NC\_HAVE\_INQ\_FORMAT\_EXTENDED is defined in netcdf.h [NCF-273]
415 
416 [NCF-273]:https://bugtracking.unidata.ucar.edu/browse/NCF-273
417 
418 
419 ### 4.3.1-rc6 Released 2013-12-19
420 
421 * Fixed fill value handling for string types in nc4\_get\_vara().
422 
423 * Corrected behavior of nc\_inq\_unlimdim and nv\_inq\_unlimdims to report dimids
424  in same order as nc\_inq\_dimids.
425 
426 * Addressed an issue reported by Jeff Whitaker regarding `nc_inq_nvars` returning an incorrect number of dimensions (this issue was introduced in 4.3.1-rc5). Integrated a test contributed by Jeff Whitaker.
427 
428 * A number of previously-disabled unit tests were reviewed and made active.
429 
430 
431 ### 4.3.1-rc5 Released 2013-12-06
432 
433 * When opening a netCDF-4 file, streamline the iteration over objects in the underlying HDF5 file.
434 
435 * Fixed netCDF-4 failure when renaming a dimension and renaming a variable using that dimension, in either order. [NCF-177]
436 
437 [NCF-177]:https://bugtracking.unidata.ucar.edu/browse/NCF-177
438 
439 * When compiling with `hdf4` support, both autotools and cmake-based builds now properly look for the `libjpeg` dependency and will link against it when found (or complain if it's not). Also added `ENABLE_HDF4_FILE_TESTS` option to CMake-based builds.
440 
441 * Fixed bug in ncgen; it was not properly filling empty string constants ("") to be the proper length. [NCF-279]
442 
443 [NCF-279]:https://bugtracking.unidata.ucar.edu/browse/NCF-279
444 
445 * Fixed bug in ncgen where it was interpreting int64 constants
446  as uint64 constants. [NCF-278]
447 
448 [NCF-278]:https://bugtracking.unidata.ucar.edu/browse/NCF-278
449 
450 * Fixed bug in handling Http Basic Authorization. The code was actually there but was not being executed. [NCF-277]
451 
452 [NCF-277]:https://bugtracking.unidata.ucar.edu/browse/NCF-277
453 
454 * Added hack to the DAP code to address a problem with the Columbia.edu server. That server does not serve up proper DAP2 DDS replies. The Dataset {...} name changes depending on if the request has certain kinds of constraints. [NCF-276]
455 
456 [NCF-276]:https://bugtracking.unidata.ucar.edu/browse/NCF-276
457 
458 * Fixed bugs with ncdump annotation of values, using -b or -f
459  options. [NCF-275]
460 
461 [NCF-275]:https://bugtracking.unidata.ucar.edu/browse/NCF-275
462 
463 
464 ### 4.3.1-rc4 Released 2013-11-06
465 
466 * Addressed an issue on Windows where `fstat` would report an incorrect file size on files > 4GB. [NCF-219]
467 
468 
469 * Added better documentation about accessing ESG datasets.
470  See http://www.unidata.ucar.edu/software/netcdf/docs/esg.html.
471 
472 * Corrected an issue with CMake-based builds enabling HDF4 support where the HDF4 libraries were in a non-standard location.
473 
474 * Fix bug introduced by [NCF-267] where octal constants above
475 '\177' were not recognized as proper octal constants. [NCF-271]
476 
477 [NCF-271]:https://bugtracking.unidata.ucar.edu/browse/NCF-271
478 
479 * Fixed an issue where the `netcdf.3` man page was not being installed by CMake-based builds. [Github](https://github.com/Unidata/netcdf-c/issues/3)
480 
481 
482 
483 ### 4.3.1-rc3 Released 2013-09-24
484 
485 * Modify ncgen to support NUL characters in character array
486  constants. [NCF-267]
487 
488 [NCF-267]:https://bugtracking.unidata.ucar.edu/browse/NCF-267
489 
490 * Modify ncgen to support disambiguating references to
491  an enum constant in a data list. [NCF-265]
492 
493 [NCF-265]:https://bugtracking.unidata.ucar.edu/browse/NCF-265
494 
495 * Corrected bug in netCDF-4 dimension ID ordering assumptions, resulting in access that works locally but fails through DAP server. [NCF-166]
496 
497 [NCF-166]:https://bugtracking.unidata.ucar.edu/browse/NCF-166
498 
499 * Added a new configuration flag, `NC_USE_STATIC_CRT` for CMake-based Windows builds. The default value is 'OFF'. This will allow the user to define whether to use the shared CRT libraries (\\MD) or static CRT libraries (\\MT) in Visual Studio builds.
500 
501 * Ensure netCDF-4 compiles with OpenMPI as an alternative to MPICH2. [NCF-160]
502 
503 [NCF-160]:https://bugtracking.unidata.ucar.edu/browse/NCF-160
504 
505 * Addressed issue with hanging Parallel netCDF-4 using HDF5 1.8.10. [NCF-240]
506 
507 [NCF-240]:https://bugtracking.unidata.ucar.edu/browse/NCF-240
508 
509 * Addressed issue with Large File Support on Windows, using both 32 and 64-bit builds. [NCF-219]
510 
511 [NCF-219]:https://bugtracking.unidata.ucar.edu/browse/NCF-219
512 
513 * Removed deprecated directories:
514  * librpc/
515  * udunits/
516  * libcf/
517  * libcdmr/
518 
519 ### 4.3.1-rc2 Released 2013-08-19
520 
521 * Added `configure` and accompanying configuration files/templates to release repository. **These will only be added to tagged releases on GitHub**.
522 
523 * Integrated a fix by Quincey Koziol which addressed a variation of [NCF-250], *Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging*.
524 
525 [NCF-250]:https://bugtracking.unidata.ucar.edu/browse/NCF-250
526 
527 * Integrated change contributed by Orion Poplawski which integrated GNUInstallDirs into the netCDF-C CMake system; this will permit systems that install into lib64 (such as Fedora) to `make install` without problem.
528 
529 * Corrected an error with the CMake config files that resulted in the `netcdf.3` manpage not being built or installed.
530 
531 ### 4.3.1-rc1 Released 2013-08-09
532 
533 * Migrated from the netCDF-C `subversion` repository to a publicly available GitHub repository available at https://github.com/Unidata/netCDF-C. This repository may be checked out (cloned) with the following command:
534 
535  $ git clone https://github.com/Unidata/netCDF-C.git
536 
537 * Note: in this release, it is necessary to generate the `configure` script and makefile templates using `autoreconf` in the root netCDF-C directory.:
538 
539  $ autoreconf -i -f
540 
541 * Added `nc_rename_grp` to allow for group renaming in netCDF-4 files. [NCF-204]
542 
543 [NCF-204]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
544 
545 * Added a `NC_HAVE_RENAME_GRP` macro to netcdf.h, [as per a request by Charlie Zender][cz1]. This will allow software compiling against netcdf to easily query whether or not nc\_rename\_grp() is available.
546 
547 [cz1]: https://bugtracking.unidata.ucar.edu/browse/NCF-204
548 
549 * Added Greg Sjaardema's contributed optimization for the nc4\_find\_dim\_len function in libsrc4/nc4internal.c. The patch eliminates several malloc/free calls that exist in the original coding.
550 
551 * Added support for dynamic loading, to compliment the dynamic loading support introduced in hdf 1.8.11. Dynamic loading support depends on libdl, and is enabled as follows: [NCF-258]
552  * autotools-based builds: --enable-dynamic-loading
553  * cmake-based builds: -DENABLE\_DYNAMIC\_LOADING=ON
554 
555 [NCF-258]: https://bugtracking.unidata.ucar.edu/browse/NCF-258
556 
557 * Fix issue of netCDF-4 parallel independent access with unlimited dimension hanging. Extending the size of an unlimited dimension in HDF5 must be a collective operation, so now an error is returned if trying to extend in independent access mode. [NCF-250]
558 
559 [NCF-250]: https://bugtracking.unidata.ucar.edu/browse/NCF-250
560 
561 * Fixed bug with netCDF-4's inability to read HDF5 scalar numeric attributes. Also allow, in addition to zero length strings, a new NULL pointer as a string value. to improve interoperability with HDF5. This required a new CDL constant, 'NIL', that can be output from ncdump for such a string value in an HDF5 or netCDF-4 file. The ncgen utility was also modified to properly handle such NIL values for strings. [NCF-56]
562 
563 [NCF-56]: https://bugtracking.unidata.ucar.edu/browse/NCF-56
564 
565 * Parallel-build portability fixes, particularly for OpenMPI and gcc/gfortran-4.8.x on OSX.
566 
567 * Fix contributed by Nath Gopalaswamy to large file problem reading netCDF classic or 64-bit offset files that have a UINT32_MAX flag for large last record size of a variable that has values larger than 1 byte. This problem had previously been fixed for *writing* such data, but was only tested with an ncbyte variable.
568 
569 * Fixed various minor documentation problems.
570 
571 ## 4.3.0 Released 2013-04-29
572 
573 * fsync: Changed default in autotools config file; fsync must now be
574 explicitly enabled instead of explicitly disabled. [NCF-239]
575 
576 [NCF-239]: https://bugtracking.unidata.ucar.edu/browse/NCF-239
577 
578 * Fixed netCDF-4 bug where odometer code for libdap2 mishandled stride > 1. Bug reported by Ansley Manke. [NCF-249]
579 
580 [NCF-249]: https://bugtracking.unidata.ucar.edu/browse/NCF-249
581 
582 * Fixed netCDF-4 bug so netCDF just ignores objects of HDF5 reference type in
583 the file, instead of rejecting the file. [NCF-29]
584 
585 [NCF-29]: https://bugtracking.unidata.ucar.edu/browse/NCF-29
586 
587 * Fixed netCDF-4 bug with particular order of creation of dimensions,
588 coordinate variables, and subgroups resulting in two dimensions with the
589 same dimension ID. [NCF-244]
590 
591 [NCF-244]: https://bugtracking.unidata.ucar.edu/browse/NCF-244
592 
593 * Fixed netCDF-4 bug with a multidimensional coordinate variable in a
594 subgroup getting the wrong dimension IDs for its dimensions. [NCF-247]
595 
596 [NCF-247]: https://bugtracking.unidata.ucar.edu/browse/NCF-247
597 
598 * Fixed bug with incorrect fixed-size variable offsets in header getting
599 written when schema changed for files created by parallel-netcdf. Thanks
600 to Wei-keng Liao for developing and contributing the fix. [NCF-234]
601 
602 [NCF-234]: https://bugtracking.unidata.ucar.edu/browse/NCF-234
603 
604 * Fixed bug in handling old servers that do not do proper Grid to
605 Structure conversions. [NCF-232]
606 
607 [NCF-232]: https://bugtracking.unidata.ucar.edu/browse/NCF-232
608 
609 * Replaced the oc library with oc2.0
610 
611 * Fix bug with nc\_get\_var1\_uint() not accepting unsigned ints larger
612 than 2\*\*31. [NCF-226]
613 
614 [NCF-226]: https://bugtracking.unidata.ucar.edu/browse/NCF-226
615 
616 * Fix to convert occurrences of '/' in DAP names to %2f. [NCF-223]
617 
618 [NCF-223]: https://bugtracking.unidata.ucar.edu/browse/NCF-223
619 
620 * Fix bug in netCDF-4 with scalar non-coordinate variables with same name
621 as dimensions. [NCF-222]
622 
623 [NCF-222]: https://bugtracking.unidata.ucar.edu/browse/NCF-222
624 
625 * Fix bug in which calling netCDF-4 functions in which behavior that
626 should not depend on order of calls sometimes produces the wrong
627 results. [NCF-217]
628 
629 [NCF-217]: https://bugtracking.unidata.ucar.edu/browse/NCF-217
630 
631 * Merged in nccopy additions from Martin van Driel to support -g and -v
632 options for specifying which groups or variables are to be copied.
633 [NCF-216]
634 
635 [NCF-216]: https://bugtracking.unidata.ucar.edu/browse/NCF-216
636 
637 * Merged in parallel-netcdf bugs fixes from Greg Sjaardema. [NCF-214]
638 
639 [NCF-214]: https://bugtracking.unidata.ucar.edu/browse/NCF-214
640 
641 * Modify ncgen so that if the incoming file has a special attribute, then
642 it is used to establish the special property of the netcdf file, but the
643 attribute is not included as a real attribute in the file. [NCF-213].
644 
645 [NCF-213]: https://bugtracking.unidata.ucar.edu/browse/NCF-213
646 
647 * Added library version info to the user-agent string so that the server
648 logs will be more informative. [NCF-210]
649 
650 [NCF-210]: https://bugtracking.unidata.ucar.edu/browse/NCF-210
651 
652 * Added work around for bad servers that sometimes sends DAP dataset with
653 duplicate field names. [NCF-208]
654 
655 [NCF-208]: https://bugtracking.unidata.ucar.edu/browse/NCF-208
656 
657 * Fixed bug with strided access for NC\_STRING type. [NCF-206]
658 
659 [NCF-206]: https://bugtracking.unidata.ucar.edu/browse/NCF-206
660 
661 * Prevented adding an invalid \_FillValue attribute to a variable (with
662 nonmatching type or multiple values), to avoid later error when any
663 record variable is extended. [NCF-190]
664 
665 [NCF-190]: https://bugtracking.unidata.ucar.edu/browse/NCF-190
666 
667 * Fix bug in which some uses of vlen within compounds causes HDF5 errors.
668 [NCF-155]
669 
670 [NCF-155]: https://bugtracking.unidata.ucar.edu/browse/NCF-155
671 
672 * Fixed ncdump bug in display of data values of variables that use
673 multiple unlimited dimensions. [NCF-144]
674 
675 [NCF-144]: https://bugtracking.unidata.ucar.edu/browse/NCF-144
676 
677 * Fix bug in which interspersing def\_var calls with put\_var calls can
678 lead to corrupt metadata in a netCDF file with groups and inherited
679 dimensions. [NCF-134]
680 
681 [NCF-134]: https://bugtracking.unidata.ucar.edu/browse/NCF-134
682 
683 * Building shared libraries works with DAP and netCDF4 functionality.
684 [NCF-205] [NCF-57]
685 
686 [NCF-205]: https://bugtracking.unidata.ucar.edu/browse/NCF-205
687 [NCF-57]: https://bugtracking.unidata.ucar.edu/browse/NCF-57
688 
689 * 32-and-64-bit builds are working under MinGW on Windows. [NCF-112]
690 
691 [NCF-112]: https://bugtracking.unidata.ucar.edu/browse/NCF-112
692 
693 * Config.h for Windows compiles are included in the build. [NCF-98]
694 
695 [NCF-98]: https://bugtracking.unidata.ucar.edu/browse/NCF-98
696 
697 * NetCDF-4 dependency on NC\_MAX\_DIMS has been removed. [NCF-71]
698 
699 [NCF-71]: https://bugtracking.unidata.ucar.edu/browse/NCF-71
700 
701 * 64-bit DLL's are produced on Windows. [NCF-65]
702 
703 [NCF-65]: https://bugtracking.unidata.ucar.edu/browse/NCF-65
704 
705 * DLL Packaging issues are resolved. [NCF-54]
706 
707 [NCF-54]: https://bugtracking.unidata.ucar.edu/browse/NCF-54
708 
709 * The CMake build system (with related ctest and cdash systems for
710 testing) has been integrated into netCDF-C. This allows for Visual
711 Studio-based builds in addition to gcc-based builds. This requires at
712 least CMake version 2.8.8. This replaces/supplements the cross-compiled
713 set of Visual-Studio compatible netCDF libraries introduced in netCDF
714 4.2.1-rc1.
715 
716 ## 4.2.1.1 Released 2012-08-03
717 
718 * Patched libdap2/ncdap3.c to fix DAP performance bug remotely accessing large files (> 2GiB).
719 
720 * Patched ncdump/dumplib.c to properly escape special characters in CDL output from ncdump for netCDF-4 string data.
721 
722 
723 ### 4.2.1 Released 2012-07-18
724 
725 * Added a specific NC\_MMAP mode flag to modify behavior of NC\_DISKLESS.
726 
727 * Changed the file protections for NC\_DISKLESS created files to 0666
728 [NCF-182]
729 
730 * Fixed ncdump to report error when an unsupported option is specified.
731 [NCF-180]
732 
733 * Fixed documentation of CDL char constants in Users Guide and ncgen man
734 page.
735 
736 * Fixed memory leak detected by valgrind in one of the HDF5 tests.
737 
738 * Fixed problem with \#elif directives in posixio.c revealed by PGI
739 compilers.
740 
741 ### 4.2.1-rc1 Released 2012-06-18
742 
743 * Ported static and shared libraries (DLL's) for both 32- and 64-bit
744 Windows, including support for DAP remote access, with netCDF-3 and
745 netCDF-4/HDF5 support enabled. The environment for this build is
746 MSYS/MinGW/MinGW64, but the resulting DLLs may be used with Visual
747 Studio. [NCF-112] [NCF-54] [NCF-57] [NCF-65]
748 
749 * Implemented diskless files for all netCDF formats. For nc\_create(),
750 diskless operation performs all operations in memory and then optionally
751 persists the results to a file on close. For nc\_open(), but only for
752 netcdf classic files, diskless operation caches the file in-memory,
753 performs all operations on the memory resident version and then writes
754 all changes back to the original file on close.
755 [NCF-110][NCF-109][NCF-5]
756 
757 * Added MMAP support. If diskless file support is enabled, then it is
758 possible to enable implementation of diskless files using the operating
759 system's MMAP facility (if available). The enabling flag is
760 "--enable-mmap". This is most useful when using nc\_open() and when only
761 parts of files, a single variable say, need to be read.
762 
763 * Added configure flag for --disable-diskless.
764 
765 * Added nccopy command-line options to exploit diskless files, resulting
766 in large speedups for some operations, for example converting unlimited
767 dimension to fixed size or rechunking files for faster access. Upgraded
768 doxygen and man-page documentation for ncdump and nccopy utilities,
769 including new -w option for diskless nccopy, with an example.
770 
771 * Modified Makefile to allow for concurrent builds and to support builds
772 outside the source tree, e.g. 'mkdir build; cd build;
773 SOURCE-DIR/configure' where SOURCE-DIR is the top-level source
774 directory.
775 
776 * Fixed some netCDF-4 bugs with handling strings in non-netCDF-4 HDF5
777 files. [NCF-150]
778 
779 * Fixed bug using nccopy to compress with shuffling that doesn't compress
780 output variables unless they were already compressed in the input file.
781 [NCF-162]
782 
783 * Fixed bug in 64-bit offset files with large records, when last record
784 variable requires more than 2\*\*32 bytes per record. [NCF-164]
785 
786 * Fix bug in which passing a NULL path to nc\_open causes failure.
787 [NCF-173]
788 
789 * Fixed ncgen bugs in parsing and handling opaque data.
790 
791 * Fixed ncdump bug, not escaping characters special to CDL in enumeration
792 labels. [NCF-169]
793 
794 * Fixed bug reading netCDF int into a C longlong or writing from longlong
795 to external int on 32-bit platforms with classic format files. The upper
796 32 bits of the longlong were not cleared on read or used on write.
797 [NCF-171]
798 
799 * Resolved some erroneous returns of BADTYPE errors and RANGE errors due
800 to conflating C memory types with external netCDF types when accessing
801 classic or 64-bit offset files. [NCF-172]
802 
803 * Fixed bug with ncdump -t interpreting unit attribute without base time
804 as a time unit. [NCF-175]
805 
806 * Changed port for testing remote access test server to increase
807 reliability of tests.
808 
809 * Modified ncio mechanism to support multiple ncio packages, so that it is
810 possible to have e.g. posixio and memio operating at the same time.
811 
812 * Generation of documentation is disabled by default. Use --enable-doxygen
813 to generate. [NCF-168]
814 
815 * Added description of configure flags to installation guide.
816 
817 * Clarified documentation of arguments to nc**open() and nc**create() and
818 their default values.
819 
820 * Fixed doxygen installation guide source file to preserve line breaks in
821 code and scripts. [NCF-174]
822 
823 * Cleaned up a bunch of lint issues (unused variables, etc.) and some
824 similar problems reported by clang static analysis.
825 
826 * Updated and fixed pkg-config source file netcdf.pc.in to work with
827 separated netCDF language-specific packages. Also fixed nc-config to
828 call nf-config, ncxx-config, and ncxx4-config for for backward
829 compatibility with use of nc-config in current Makefiles. [NCF-165]
830 [NCF-179]
831 
832 ## 4.2.0 2012-05-01
833 
834 * Completely rebuilt the DAP constraint handling. This primarily affects
835 users who specify a DAP constraint as part of their URL. [NCF-120]
836 
837 * Fixed cause of slow nccopy performance on file systems with many records
838 and large disk block size or many record variables, by accessing data a
839 record at a time instead of a variable at a time. [NCF-142]
840 
841 * Performance improvement to DAP code to support fetching partial
842 variables into the cache; especially important when using nc\_get\_var()
843 API. A partial variable is one that has ranges attached to the
844 projection variables (e.g. x[1:10][20:21]) [NCF-157]
845 
846 * Separate the Fortran and C++ libraries and release the C library and
847 ncdump/ncgen/nccopy without Fortran or C++. [NCF-24]
848 
849 * Documentation mostly migrated to Doxygen, from Texinfo. [NCF-26]
850 
851 * Properly convert vara start/count parameters to DAP [NCF-105][NCF-106]
852 
853 * Fixed major wasted space from previous default variable chunk sizes
854 algorithm. [NCF-81]
855 
856 * Fixed bug in nccopy, in which compression and chunking options were
857 ignored for netCDF-4 input files. [NCF-79]
858 
859 * Fixed bug in ncgen in which large variables (more than 2**18 elements)
860 duplicates the first 2**18 values into subsequent chunks of data
861 [NCF-154].
862 
863 * Applied Greg Sjaardema's nccopy bug fix, not compressing output
864 variables f they were not already using compression on the input file
865 when shuffle specified. [NCF-162]
866 
867 * Fixed problem when a URL is provided that contains only a host name.
868 [NCF-103]
869 
870 * Fixed behavior of ncgen flags so that -o => -lb and, in the absence of
871 any other markers, make the default be -k1 [NCF-158]
872 
873 * Created a text INSTALL file for netCDF-4.2 release. [NCF-161]
874 
875 * Fixed bug in ncgen for vlen arrays as fields of compound types where
876 datalists for those types was improperly interpreted [NCF-145] (but see
877 NCF-155).
878 
879 * Improve use of chunk cache in nccopy utility, making it practical for
880 rechunking large files. [NCF-85]
881 
882 * Fixed nccopy bug copying a netCDF-4 file with a chunksize for an
883 unlimited dimension that is larger than the associated dimension size.
884 [NCF-139]
885 
886 * Fixed nccopy bug when rechunking a netCDF-4 file with a chunkspec option
887 that doesn't explicitly specify all dimensions. [NCF-140]
888 
889 * Fixed bug in netCDF-4 files with non-coordinate variable with the same
890 name as a dimension. [NCF-141]
891 
892 * Incorporated Wei Huang's fix for bug where netCDF-4 sometimes skips over
893 too many values before adding fill values to an in-memory buffer.
894 [NCF-143]
895 
896 * Fixed ncgen bug with netCDF-4 variable-length constants (H/T to Lynton
897 Appel). [NCF-145]
898 
899 * Incorporated Peter Cao's performance fixes using HDF5 link iterator for
900 any group with many variables or types. [NCF-148]
901 
902 * Incorporated Constantine Khroulev's bug fix for invalid usage of
903 MPI\_Comm\_f2c in nc\_create\_par. [NCF-135]
904 
905 * Fixed turning off fill values in HDF5 layers when NOFILL mode is set in
906 netCDF-4 API (thanks to Karen Schuchardt). [NCF-151]
907 
908 * Fixed bug with scalar coordinate variables in netCDF-4 files, causing
909 failure with --enable-extra-tests [NCF-149]
910 
911 * Cleaned up the definition and use of nulldup. [NCF-92][NCF-93][NCF-94]
912 
913 * Fixed various '\#include' bugs. [NCF-91][NCF-96][NCF-127]
914 
915 * v2 API functions modified to properly call the external API instead of
916 directly calling the netcdf-3 functions. [NCF-100]
917 
918 * Fixed problem with 64-bit offset format where writing more than 2\*\*31
919 records resulted in erroneous NC\_EINVALCOORDS error. [NCF-101]
920 
921 * Restored original functionality of ncgen so that a call with no flags,
922 only does the syntax check. [NCF-104]
923 
924 * Corrected misc. test bugs [NCF-107]
925 
926 * Modified ncdump to properly output various new types (ubyte, ushort,
927 uint, int64, and uint64). [NCF-111]
928 
929 * Fixed incorrect link flag for szip in configure.ac [NCF-116]
930 
931 * ncdump -t now properly parses ISO "T" separator in date-time strings.
932 [NCF-16]
933 
934 * ncdump -t "human time" functionality now available for attributes and
935 bounds variables [NCF-70]
936 
937 * In ncdump, add -g option to support selection of groups for which data
938 is displayed. [NCF-11]
939 
940 * Now supports bluefire platform [NCF-52]
941 
942 * ncdump now properly displays values of attributes of type NC\_USHORT as
943 signed shorts [NCF-82]
944 
945 * Rename some code files so that there are no duplicate filenames.
946 [NCF-99]
947 
948 * Demonstration of netCDF-4 Performance Improvement with KNMI Data
949 [NCF-113]
950 
951 * Dimension size in classic model netCDF-4 files now allows larger sizes
952 than allowed for 64-bit offset classic files. [NCF-117]
953 
954 * ncdump now reports correct error message when "-x" option specifying
955 NcML output is used on netCDF-4 enhanced model input. [NCF-129]
956 
957 * Fixed bug causing infinite loop in ncdump -c of netCDF-4 file with
958 subgroup with variables using inherited dimensions. [NCF-136]
959 
960 ## 4.1.3 2011-06-17
961 
962 * Replace use of --with-hdf5= and other such configure options that
963 violate conventions and causes build problems. Set environment variables
964 CPPFLAGS, LDFLAGS, and LD\_LIBRARY\_PATH instead, before running
965 configure script. [NCF-20]
966 
967 * Detect from configure script when szlib is needed [NCF-21]
968 
969 * Fix bug that can silently zero out portions of a file when writing data
970 in nofill mode beyond the end of a file, crossing disk-block boundaries
971 with region to be written while in-memory buffer is in a specific state.
972 This bug was observed disabling fill mode using Lustre (or other large
973 blksize file system) and writing data slices in reverse order on disk.
974 [NCF-22]
975 
976 * Fix bug that prevents netCDF-4/HDF5 files created with netCDF-4.1.2 from
977 being read by earlier versions of netCDF or HDF5 versions before 1.8.7.
978 [NCF-23]
979 
980 * Fix bug in configure that did not make the search for the xdr library
981 depend on --enable-dap. [NCF-41]
982 
983 * Fix ncgen bug that did not use the value of a \_Format attribute in the
984 input CDL file to determine the kind of output file created, when not
985 specified by the -k command-line flag. [NCF-42]
986 
987 * Fix ncgen bug, not properly handling unsigned longlong parsing. [NCF-43]
988 
989 * Fix DAP client code to suppress variables with names such as "x.y",
990 which DAP protocol interprets as variable "y" inside container "x". Such
991 variables will be invisible when accessed through DAP client. [NCF-47]
992 
993 * Define uint type for unsigned integer, if not otherwise available.
994 Symptom was compile error involving uint in putget.c. [NCF-49]
995 
996 * Fix username+password handling in the DAP client code. [NCF-50]
997 
998 * Add test for handling parallel I/O problem from f77 when user forgets to
999 turn on one of the two MPI flags. [NCF-60]
1000 
1001 * Resolved "make check" problems when ifort compiler. Some "make install"
1002 problems remain when using MPI and shared libraries. [NCF-61]
1003 
1004 * Fix problem with f90\_def\_var not always handle deflate setting when
1005 compiler was ifort. [NCF-67]
1006 
1007 * Check that either MPIIO or MPIPOSIX flag is set when parallel create or
1008 open is called. Also fix examples that didn't set at least one of these
1009 flags. [NCF-68]
1010 
1011 * Improve documentation on handling client-side certificates [NCF-48]
1012 
1013 * Document that array arguments, except in varm functions, must point to
1014 contiguous blocks of memory. [NCF-69]
1015 
1016 * Get netCDF-4 tests working for DLLs generated with mingw. [NCF-6]
1017 
1018 * Make changes necessary for upgrading to HDF5 1.8.7 [NCF-66]
1019 
1020 ### 4.1.3-rc1 2011-05-06
1021 
1022 * Stop looking for xdr if --disable-dap is used.
1023 
1024 * Don't try to run (some) fortran configure tests on machines with no
1025 fortran.
1026 
1027 * Allow nccopy to rechunk with chunksizes larger than current dimension
1028 lengths.
1029 
1030 * Initial implementation of CDMREMOTE is complete; needs comprehensive
1031 testing.
1032 
1033 ### 4.1.3-beta1 2011-04-29
1034 
1035 * Fixed szlib not linking bug.
1036 
1037 * Fixed dreaded "nofill bug", lurking in netCDF classic since at least
1038 1999. Writing more than a disk block's worth of data that crossed disk
1039 block boundaries more than a disk block beyond the end of file in nofill
1040 mode could zero out recently written earlier data that hadn't yet been
1041 flushed to disk.
1042 
1043 * Changed setting for H5Pset\_libver\_bounds to ensure that all netCDF-4
1044 files can be read by HDF5 1.8.x.
1045 
1046 * Merged libncdap3 and libncdap4 into new libdap2 library. The suffix dap2
1047 now refers to the dap protocol. This is in prep for adding dap4 protocol
1048 support.
1049 
1050 * Took out --with-hdf5 and related options due to high cost of maintaining
1051 this non-standard way of finding libraries.
1052 
1053 ## 4.1.2 2011-03-29
1054 
1055 * Changes in build system to support building dlls on cygwin/mingw32.
1056 
1057 * Changes to fix portability problems and get things running on all test
1058 platforms.
1059 
1060 * Some minor documentation fixes.
1061 
1062 * Fixed opendap performance bug for nc\_get\_vars; required adding
1063 nc\_get\_var{s,m} to the dispatch table.
1064 
1065 * Now check for libz in configure.ac.
1066 
1067 * Fixed some bugs and some performance problems with default chunksizes.
1068 
1069 ### 4.1.2-beta2 2011-01-11
1070 
1071 * Add "-c" option to nccopy to specify chunk sizes used in output in terms
1072 of list of dimension names.
1073 
1074 * Rewrite netCDF-4 attribute put code for a large speedup when writing
1075 lots of attributes.
1076 
1077 * Fix nc-config --libs when static dependent libraries are not installed
1078 in the same directory as netCDF libraries (thanks to Jeff Whitaker).
1079 
1080 * Build shared libraries by default, requiring separate Fortran library.
1081 Static libraries now built only with --disable-shared.
1082 
1083 * Refactor of HDF5 file metadata scan for large speedup in opening files,
1084 especially large files.
1085 
1086 * Complete rewrite of the handling of character datalist constants. The
1087 heuristics are documented in ncgen.1.
1088 
1089 * Eliminate use of NC\_MAX\_DIMS and NC\_MAX\_VARS in ncdump and nccopy,
1090 allocating memory as needed and reducing their memory footprint.
1091 
1092 * Add documentation for new nc\_inq\_path() function.
1093 
1094 * Use hashing to speedup lookups by name for files with lots of dimensions
1095 and variables (thanks to Greg Sjaardema).
1096 
1097 * Add options to nccopy to support uniform compression of variables in
1098 output, shuffling, and fixing unlimited dimensions. Documented in
1099 nccopy.1 man page and User's Guide.
1100 
1101 ### 4.1.2-beta1 2010-07-09
1102 
1103 * Fix "ncdump -c" bug identifying coordinate variables in groups.
1104 
1105 * Fix bug in libsrc/posixio.c when providing sizehint larger than default,
1106 which then doesn't get used (thanks to Harald Anlauf).
1107 
1108 * Fix netCDF-4 bug caused when doing enddef/redef and then defining
1109 coordinate variable out of order.
1110 
1111 * Fixed bug in man4 directory automake file which caused documentation to
1112 be rebuilt after make clean.
1113 
1114 * Turned off HDF5 caching when parallel I/O is in use because of its
1115 memory use.
1116 
1117 * Refactoring of netCDF code with dispatch layer to decide whether to call
1118 netCDF classic, netCDF-4, or opendap version of a function.
1119 
1120 * Refactoring of netCDF-4 memory internals to reduce memory use and end
1121 dependence on NC\_MAX\_DIMS and NC\_MAX\_NAME.
1122 
1123 * Modified constraint parser to be more compatible with a java version of
1124 the parser.
1125 
1126 * Modified ncgen to utilize iterators internally; should be no user
1127 visible effect.
1128 
1129 * Fixed two large-file bugs with using classic format or 64-bit offset
1130 format and accessing multidimensional variables with more than 2\*\*32
1131 values.
1132 
1133 ## 4.1.1 2010-04-01
1134 
1135 * Fixed various build issues.
1136 
1137 * Fixed various memory bugs.
1138 
1139 * Fixed bug for netCDF-4 files with dimensions and coord vars written in
1140 different orders, with data writes interspersed.
1141 
1142 * Added test for HDF5-1.8.4 bug.
1143 
1144 * Added new C++ API from Lynton Appel.
1145 
1146 ## 4.1 2010-01-30
1147 
1148 * Much better memory leak checking with valgrind.
1149 
1150 * Added per-variable chunk cache control for better performance. Use
1151 nc\_set\_var\_chunk\_cache / nf\_set\_var\_chunk\_cache /
1152 nf90\_set\_var\_chunk\_cache to set the per-variable cache.
1153 
1154 * Automatically set per-variable chunk cache when opening a file, or
1155 creating a variable, so that the cache is big enough for more than one
1156 chunk. (Can be overridden by user). Settings may be changed with
1157 configure options --max-default-chunk-size and
1158 --default-chunks-in-cache.
1159 
1160 * Better default chunks size. Now chunks are sized to fit inside the
1161 DEFAULT\_CHUNK\_SIZE (settable at configure time with
1162 --with-default-chunk-size= option.)
1163 
1164 * Added nccopy utility for converting among netCDF format variants or to
1165 copy data from DAP servers to netCDF files.
1166 
1167 * The oc library has been modified to allow the occurrence of alias
1168 definitions in the DAS, but they will be ignored.
1169 
1170 * The old ncgen has been moved to ncgen3 and ncgen is now the new ncgen4.
1171 
1172 * Modified --enable-remote-tests to be on by default.
1173 
1174 * Fixed the nc\_get\_varm code as applied to DAP data sources.
1175 
1176 * Added tests for nc-config.
1177 
1178 * Many documentation fixes.
1179 
1180 * Added capability to use the parallel-netcdf (a.k.a. pnetcdf) library to
1181 perform parallel I/O on classic and 32-bit offset files. Use the
1182 NC\_PNETCDF mode flag to get parallel I/O for non-netcdf-4 files.
1183 
1184 * Added libcf library to netCDF distribution. Turn it on with configure
1185 option --with-libcf.
1186 
1187 * Added capability to read HDF4 files created with the SD (Scientific
1188 Data) API.
1189 
1190 * The DAP support was revised to closely mimic the original libnc-dap
1191 support.
1192 
1193 * Significantly revised the data handling mechanism in ncgen4 to more
1194 closely mimic the output from the original ncgen.
1195 
1196 * Added prototype NcML output capability to ncgen4. It is specified by the
1197 -lcml flag.
1198 
1199 * Added capability to read HDF5 files without dimension scales. This will
1200 allow most existing HDF5 datasets to be read by netCDF-4.
1201 
1202 * Fixed bug with endianness of default fill values for integer types when
1203 variables are created with a non-native endiannesss and use the default
1204 fill value.
1205 
1206 * Significant refactoring of HDF5 type handling to improve performance and
1207 handle complicated nesting of types in cross-platform cases.
1208 
1209 * Added UDUNITS2 to the distribution. Use --with-udunits to build udunits
1210 along with netcdf.
1211 
1212 * Made changes suggested by HDF5 team to relax creation-order requirement
1213 (for read-only cases) which allows HDF5 1.6.x files to be retrofitted
1214 with dimension scales, and be readable to netCDF-4.
1215 
1216 * Handle duplicate type names within different groups in ncdump. Fix group
1217 path handling in absolute and relative variable names for "-v" option.
1218 
1219 * Added nc-config shell script to help users build netCDF programs without
1220 having to figure out all the compiler options they will need.
1221 
1222 * Fixed ncdump -s bug with displaying special attributes for classic and
1223 64-bit offset files.
1224 
1225 * For writers, nc\_sync() now calls fsync() to flush data to disk sooner.
1226 
1227 * The nc\_inq\_type() function now works for primitive types.
1228 
1229 ## 4.0.1 2009-03-26
1230 
1231 * Added optional arguments to F90 API to nf90\_open/create,
1232 nf90\_create\_var, and nf90\_inquire\_variable so that all netCDF-4
1233 settings may be accomplished with optional arguments, instead of
1234 separate function calls.
1235 
1236 * Added control of HDF5 chunk cache to allow for user performance tuning.
1237 
1238 * Added parallel example program in F90.
1239 
1240 * Changed default chunking to better handle very large variables.
1241 
1242 * Made contiguous the default for fixed size data sets with no filters.
1243 
1244 * Fixed bug in nc\_inq\_ncid; now it returns NC\_ENOGRP if the named group
1245 is not found.
1246 
1247 * Fixed man pages for C and F77 so that netCDF-4 builds will result in man
1248 pages that document new netCDF-4 functions.
1249 
1250 * Added OPeNDAP support based on a new C-only implementation. This is
1251 enabled using --enable-dap option and requires libcurl. The configure
1252 script will attempt to locate libcurl, but if it fails, then its
1253 location must be specified by the --with-curl option.
1254 
1255 ### 4.0.1-beta2 2008-12-26
1256 
1257 * Changed chunksizes to size\_t from int.
1258 
1259 * Fixed fill value problem from F77 API.
1260 
1261 * Fixed problems in netcdf-4 files with multi-dimensional coordinate
1262 variables.
1263 
1264 * Fixed ncgen to properly handle CDL input that uses Windows line endings
1265 ("\r\n"), instead of getting a syntax error.
1266 
1267 * Added "-s" option to ncdump to display performance characterisitics of
1268 netCDF-4 files as special virtual attributes, such as \_Chunking,
1269 \_DeflateLevel, \_Format, and \_Endianness.
1270 
1271 * Added "-t" option to ncdump to display times in human readable form as
1272 strings. Added code to interpret "calendar" attribute according to CF
1273 conventions, if present, in displaying human-readable times.
1274 
1275 * Added experimental version of ncgen4 capable of generating netcdf-4 data
1276 files and C code for creating them. In addition, it supports the special
1277 attributes \_Format, etc.
1278 
1279 * 4.0.1-beta1 2008-10-16
1280 
1281 * Fixed Fortran 90 int64 problems.
1282 
1283 * Rewrote HDF5 read/write code in accordance with performance advice from
1284 Kent.
1285 
1286 * Fixed memory leaks in gets/puts of HDF5 data.
1287 
1288 * Fixed some broken tests for parallel I/O (i.e. MPI) builds.
1289 
1290 * Fixed some cross-compile problems.
1291 
1292 * Rewrote code which placed bogus errors on the HDF5 error stack, trying
1293 to open non-existent attributes and variables. Now no HDF5 errors are
1294 seen.
1295 
1296 * Removed man subdirectory. Now man4 subdirectory is used for all builds.
1297 
1298 * Changed build so that users with access to parallel make can use it.
1299 
1300 * Added experimental support for accessing data through OPeNDAP servers
1301 using the DAP protocol (use --enable-opendap to build it).
1302 
1303 * Fixed ncdump bugs with array field members of compound type variables.
1304 Fixed ncdump bug of assuming default fill value for data of type
1305 unsigned byte.
1306 
1307 ## 4.0 2008-05-31
1308 
1309 * Introduced the use of HDF5 as a storage layer, which allows use of
1310 groups, user-defined types, multiple unlimited dimensions, compression,
1311 data chunking, parallel I/O, and other features. See the netCDF Users
1312 Guide for more information.
1313 
1314 ## 3.6.3 2008-05-31
1315 
1316 * In ncdump and ncgen, added CDL support for UTF-8 encoding of characters
1317 in names and for escaped special chars in names. Made sure UTF-8 names
1318 are normalized using NFC rules before storing or comparing.
1319 
1320 * Handle IEEE NaNs and infinities in a platform-independent way in ncdump
1321 output.
1322 
1323 * Added support for ARM representation of doubles, (thanks to Warren
1324 Turkal).
1325 
1326 * Fixed bug in C++ API creating 64-bit offset files. (See
1327 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#cxx_64-bit).
1328 
1329 * Fixed bug for variables larger than 4 GB. (See
1330 http://www.unidata.ucar.edu/software/netcdf/docs/known_problems.html#large_vars_362).
1331 
1332 * Changed the configure.ac to build either 3.6.x or 4.x build from the
1333 same configure.ac.
1334 
1335 * Build now checks gfortran version and handles it cleanly, also Portland
1336 Group in Intel fortran, with various configurations.
1337 
1338 * A Fortran netcdf.inc file is now created at build time, based on the
1339 setting of --disable-v2.
1340 
1341 * Documentation has been fixed in several places.
1342 
1343 * Upgraded to automake 1.10, autoconf 2.62, and libtool 2.2.2.
1344 
1345 * Includes missing Windows Visual Studio build files.
1346 
1347 * Fixed missing include of config.h in a C++ test program.
1348 
1349 * Fixed maintainer-clean in man directory.
1350 
1351 * Fixed --enable-c-only and make check.
1352 
1353 * Fixed behavior when opening a zero-length file.
1354 
1355 * Many portability enhancements to build cleanly on various platforms.
1356 
1357 * Turned on some old test programs which were not being used in the build.
1358 
1359 ## 3.6.2 2007-03-05
1360 
1361 * Released.
1362 
1363 ### 3.6.2 beta6 2007-01-20
1364 
1365 * Fine tuning of build system to properly handle cygwin, Mingw, and
1366 strange configuration issues.
1367 
1368 * Automake 1.10 has a problem with running our tests on MinGW, so I'm
1369 switching back to automake 1.9.6 for this release.
1370 
1371 ### 3.6.2 beta5 2006-12-30
1372 
1373 * Now netCDF configuration uses autoconf 2.61, and automake 1.10. (Thanks
1374 to Ralf Wildenhues for the patches, and all the autotools help in
1375 general!)
1376 
1377 * Final major revision of netCDF tutorial before the 3.6.2 release.
1378 
1379 * Now netCDF builds under MinGW, producing a windows DLL with the C and
1380 F77 APIs. Use the --enable-shared --enable-dll --disable-cxx
1381 --disable-f90 flags to configure. (C++ and F90 have never been built as
1382 windows DLLs, but might be in a future release if there is user
1383 interest). This has all been documented in the netCDF Porting and
1384 Installation Guide.
1385 
1386 * Now extreme numbers (i.e. those close to the limits of their type) can
1387 be turned off in nc\_test/nf\_test, with --disable-extreme-numbers. It
1388 is turned off automatically for Solaris i386 systems.
1389 
1390 * Added --enable-c-only option to configure. This causes only the core
1391 netCDF-3 C library to be built. It's the same as --disable-f77
1392 --disable-cxx --disable-v2 --disable-utilities.
1393 
1394 * Added --disable-utilities to turn off building and testing of
1395 ncgen/ncdump.
1396 
1397 * Fix a long-standing bug in nf90\_get\_att\_text() pointed out by Ryo
1398 Furue, to make sure resulting string is blank-padded on return. This is
1399 fixed in the Fortran-90 interface, but is impractical to fix in the
1400 Fortran-77 interface implemented via cfortran.h.
1401 
1402 * Now large file tests are run if --enable-large-file-tests is used in the
1403 configure.
1404 
1405 * For Cray users, the ffio module is used if the --enable-ffio option is
1406 passed to configure.
1407 
1408 * Unrolled loops in byte-swapping code used on little-endian platforms to
1409 reduce loop overhead. This optimization resulted in a 22% speedup for
1410 some applications accessing floats or ints (e.g. NCO utilities ncap and
1411 ncbo) and a smaller speedup for shorts or doubles.
1412 
1413 * Added "-k" option to ncdump and ncgen, for identifying and specifying
1414 the kind of netCDF file, one of "classic", "64-bit-offset", "hdf5", or
1415 "hdf5-nc3". Removed output of kind of netCDF file in CDL comment
1416 produced by ncdump.
1417 
1418 * Fixed bug of ncdump seg-faulting if invoked incorrectly with option like
1419 "-c" or "-h" but no file name.
1420 
1421 ### 3.6.2 beta4 2006-08-15
1422 
1423 * Changed F77/F90 man pages from netcdf.3f and netcdf.3f90 to
1424 netcdf\_f77.3 and netcdf\_f90.3. Also fixed broken install of man pages.
1425 
1426 * Changed configure script so that "-g -O2" is no longer set as CFLAGS,
1427 CXXFLAGS, and FFLAGS by default if a GNU compiler is being used. Now
1428 nothing is set.
1429 
1430 * Changed configure script so that fortran flag is set in config.h.
1431 
1432 * Updated Installation and Porting Guide, C++ Interface Guide, F77 and F90
1433 Interface Guides.
1434 
1435 * Build with static libraries by default.
1436 
1437 * Added configure option --enable-separate-fortran, which causes the
1438 fortran library to be built separately. This is turned on automatically
1439 for shared libraries.
1440 
1441 * Improved clarity of error messages.
1442 
1443 * Changed configuration to get cygwin DLL and mingw DLL builds working,
1444 for the C library only (i.e. no F77, F90, or C++ APIs).
1445 
1446 * Changed type of ncbyte in C++ interface from unsigned char to signed
1447 char, for consistency with C interface. The C++ documentation warned
1448 this change would eventually occur.
1449 
1450 * Changed the C++ interface to use only the netCDF-3 C interface instead
1451 of the older netCDF-2 C interface. This has the added benefit that
1452 on-the-fly numeric conversions are now supported using get methods, for
1453 example you can get data of any type as double. When using --disable-v2
1454 flag to configure, the C++ interface can now be built and installed.
1455 
1456 ### 3.6.2 beta3 2006-05-24
1457 
1458 * Changed to use default prefix of /usr/local instead of package-based
1459 prefix of previous releases of netCDF. Use the --prefix argument to the
1460 configure script to override the default.
1461 
1462 * Made separate fortran library file, instead of appending fortran library
1463 functions to the C library file, if --enable-separate-fortran is used
1464 during configure (it's turned on automatically if --enable-shared is
1465 used). If uses, the fortran API users must link to *both* the C library
1466 and the new fortran library, like this: -lnetcdff -lnetcdf
1467 
1468 * Added netCDF examples in C, C++, F77, F90, and CDL. See the examples
1469 subdirectory.
1470 
1471 * Added the NetCDF Tutorial.
1472 
1473 * Minor fixes to some of the netCDF documentation.
1474 
1475 * Made it possible to build without V2 API using --disable-v2 from
1476 configure.
1477 
1478 * Switched to new build system, with automake and libtool. Now shared
1479 libraries are built (as well as static ones) on platforms which support
1480 it. For more information about shared libraries, see
1481 http://www.unidata.ucar.edu/software/netcdf/docs/faq.html#shared_intro
1482 
1483 * Fixed ncdump crash that happened when no arguments were used.
1484 
1485 * Fixed for building with gfortran 4.1.0.
1486 
1487 * Important fix for machines whose SIZEOF\_SIZE\_T != SIZEOF\_LONG, such
1488 as NEC-SX, thanks to Stephen Leak.
1489 
1490 * Fixed C++ on AIX platform.
1491 
1492 * Fixed 64-bit builds on AIX platform.
1493 
1494 * Removed bad assertion that could be triggered in rare cases when reading
1495 a small file.
1496 
1497 * Added comments in v1hpg.c to clarify purpose of each internal function.
1498 
1499 * Make sure filesize is determined in nc\_close() *after* buffers get
1500 flushed.
1501 
1502 * Fix long-standing problem resulting in files up to 3 bytes longer than
1503 necessary if there is exactly one record variable of type byte, char, or
1504 short and if the number of values per record for that variable is not
1505 divisible by 4 (or 2 in the case of short). Now the filesize determined
1506 from header info by NC\_calcsize should be correct in all cases.
1507 
1508 ## 3.6.1 2006-01-31
1509 
1510 * Updated installation manual for 3.6.1.
1511 
1512 * Changed installation to try to provide correct compiler flags for
1513 compiling in 64-bit mode on Sun, Irix, AIX, and HPUX. (HPUX doesn't work
1514 for me, however). Now run configure with --enable-64bit to get a 64 bit
1515 compile.
1516 
1517 * Fixed long-standing bug that would cause small netCDF files to be padded
1518 on the end with zero bytes to 4096 bytes when they were opened and
1519 changed. Now small files should stay small after you change a value.
1520 
1521 * Fixed bug in assertions in putget.c that would only be noticed if you
1522 change the manifest constant NC\_MAX\_DIMS in netcdf.h to be different
1523 from NC\_MAX\_VAR\_DIMS.
1524 
1525 * Moved test ftest.F from fortran to nf\_test directory, and fixed bug in
1526 ftest.F which caused it to return 0 even if tests failed (no tests were
1527 failing, however). Also renamed some test output files to make things a
1528 little clearer.
1529 
1530 * If open for writing, pad with up to 3 extra zero bytes before close to
1531 the correct canonical length, calculated from the header. Previously
1532 files could be short due to not padding when writing in NOFILL mode.
1533 
1534 * Doubled arbitrary limits on number of dimensions, variables, attributes,
1535 and length of names.
1536 
1537 * Change name of nc\_get\_format() to nc\_inq\_format(). Add analogous
1538 interfaces for nf\_inq\_format(), nf90\_inquire(), and
1539 NcFile::get\_format() to f77, f90, and C++ interfaces. Document new
1540 function in texinfo files. Add minimal test to nc\_test, nf\_test.
1541 
1542 ### 3.6.1-beta3 2005-02-17
1543 
1544 * Added function nc\_get\_format(int ncid, int\* formatp) that returns
1545 either NC\_FORMAT\_CLASSIC or NC\_FORMAT\_64BIT for a CDF1 or CDF2 file,
1546 respectively.
1547 
1548 * Added test to nc\_test that detects whether format version was changed
1549 after a file is reopened and define mode is entered.
1550 
1551 * Correctly configure for Intel ifort Fortran compiler on Linux.
1552 
1553 ### 3.6.0-p1 2005-02-18
1554 
1555 * Fixed bug that changes CDF2 files to CDF1 files if CDF2 file is reopened
1556 for write access and either an attribute is changed or define mode is
1557 entered.
1558 
1559 ### 3.6.1-beta2 2005-1-6
1560 
1561 * Fixed absoft compile problem. Maybe.
1562 
1563 ### 3.6.1-beta1 2005-1-3
1564 
1565 * Fixed Cygwin C++ problem.
1566 
1567 * Fixed large file problem in MS Visual C++.NET environment.
1568 
1569 * More information in installation and porting guide.
1570 
1571 ## 3.6.0 2004-12-16
1572 
1573 * Added texinfo source for the documentation.
1574 
1575 * Added large file tests to Windows directory in distribution.
1576 
1577 * Modified win32 visual studio project files so that m4 is no longer
1578 required to build netcdf under visual studio.
1579 
1580 * Modified rules.make to use install instead of cp, fixing install problem
1581 for cygwin users.
1582 
1583 * Modified configure/install stuff to support HP-UX.
1584 
1585 * Modified configure/install stuff to support G95.
1586 
1587 * In the f90 interface, applied Arnaud Desitter's fixes to correct
1588 mismatches between scalar and array arguments, eliminating (legitimate)
1589 complaints by the NAGWare f95 compiler. Also fixed bugs introduced in
1590 3.6.0-beta5 in the mapped array interfaces.
1591 
1592 ### 3.6.0-beta6 2004-10-05
1593 
1594 * Fixed AIX 64-bit/largefile install problems.
1595 
1596 * Removed FAQ section from netcdf.texi User's Guide, in deference to
1597 online version that can be kept up to date more easily.
1598 
1599 ### 3.6.0-beta5 2004-10-04
1600 
1601 * Fixed assertion violation on 64-bit platforms when size of last fixed
1602 size variable exceeds 2\^32 - 1.
1603 
1604 * Removed another restriction on file size by making record size (derived
1605 from other sizes, not part of the format) an off\_t instead of a
1606 size\_t, when an off\_t is larger than a size\_t. This permits records
1607 to be *much* larger in either classic format or 64-bit-offset format.
1608 
1609 * Incorporated patch from Mathis Rosenhauer to improve performance of
1610 Fortran 90 interface for calls to nf90\_put\_var\_TYPE(),
1611 nf90\_get\_var\_TYPE(), nf90\_put\_vara\_TYPE(), and
1612 nf90\_get\_vara\_TYPE() functions by not emulating them with the
1613 corresponding nf90\_put\_varm\_TYPE() and nf90\_get\_varm\_TYPE() calls.
1614 
1615 * Added tests for invalid offsets in classic format when defining multiple
1616 large variables.
1617 
1618 * Improved installation ease. Have configure script use Large File Support
1619 as a default, if available.
1620 
1621 * Add "extra\_test" as a target for testing Large File Support.
1622 
1623 ### 3.6.0-beta3 2004-08-24
1624 
1625 * Upgraded to recent autoconf, changed configure to (hopefully) improve
1626 installation. Also added macros to deal with large file systems.
1627 
1628 * Added nf\_set\_default\_format to Fortran interface.
1629 
1630 * Added testing to the set\_default\_format functions to nc\_test and
1631 nf\_test.
1632 
1633 * Added documentation to the man page for set\_default\_format functions.
1634 
1635 * Added two new error return codes to C, f77, and f90 interfaces for
1636 invalid dimension size and for bad variable size. Made test for max
1637 dimension size depend on whether 64-bit offsets used. Fixed bug with
1638 dimension sizes between 2\^31 and 2\^32 (for byte variables).
1639 
1640 * Fixed ncdump to properly print dimensions larger than 2\^31.
1641 
1642 * Fixed ncgen to properly handle dimensions between 2\^31 and 2\^32.
1643 
1644 ### 3.6.0-beta2
1645 
1646 * Added -v2 (version 2 format with 64-bit offsets) option to
1647 ncgen, to specify that generated files or generated C/Fortran code
1648 should create 64-bit offset files. Also added -x option to ncgen to
1649 specify use of no-fill mode for fast creation of large files.
1650 
1651 * Added function to set default create mode to C interface
1652 (nc\_set\_default\_create).
1653 
1654 * Added win32 directory, with NET subdirectory to hold .NET port of
1655 netCDF. To use, open netcdf.sln with Visual Studio, and do a clean and
1656 then a build of either the debug or release builds. Tests will be run as
1657 part of the build process. VC++ with managed extensions is required
1658 (i.e. VC++.NET).
1659 
1660 * Added windows installer files to build windows binary installs.
1661 
1662 ### 3.6.0-beta1
1663 
1664 * By incorporating Greg Sjaardema's patch, added support for
1665 64-bit offset files, which remove many of the restrictions relating to
1666 very large files (i.e. larger than 2 GB.) This introduces a new data
1667 format for the first time since the original netCDF format was
1668 introduced. Files in this new 64-bit offset format can't be read by
1669 earlier versions of netCDF. Users should continue to use the netCDF
1670 classic format unless they need to create very large files.
1671 
1672 * The test suite, nc\_test, will now be run twice, once for netCDF classic
1673 format testing, and once for 64-bit offset format testing.
1674 
1675 * The implementation of the Fortran-77 interface has been adapted to
1676 version 4.3 of Burkhard Burow's "cfortran.h".
1677 
1678 ### 3.6.0-alpha
1679 
1680 * Added NEC SX specific optimization for NFILL tunable
1681 parameter in libsrc/putget.c
1682 
1683 Added support for the ifc Fortran-90 compiler creating files "netcdf.d"
1684 and "typesizes.d" (instead of ".mod" files).
1685 
1686 * Fixed access to iargc and getarg functions from Fortran-90 for NAG f90
1687 compiler, contributed by Harald Anlauf.
1688 
1689 ## 3.5.1 2004-02-03
1690 
1691 * Updated INSTALL.html for Mac OS X (Darwin).
1692 
1693 * Made the installation of the netCDF Fortran-90 module file more robust
1694 regarding the name of the file.
1695 
1696 * Added support for eight-byte integers in Fortran90 interface.
1697 
1698 * Increased advisory limits in C netcdf.h and Fortran netcdf.inc for
1699 maximum number of dimensions, variables, and attributes.
1700 
1701 * Changed C++ declarations "friend NcFile" to "friend class NcFile" in
1702 cxx/netcdfcpp.h to conform to standard.
1703 
1704 * Added Dan Schmitt's backward compatible extension to the C++ record
1705 interface to work with arbitrary dimension slices.
1706 
1707 * Added C++ documentation note that caller is responsible for deleting
1708 pointer returned by Variable::values() method when no longer needed.
1709 
1710 * Made C++ interface more standard; the result may not compile on some old
1711 pre-standard C++ compilers.
1712 
1713 * Fixed bug in ncgen when parsing values of a multidimensional char
1714 variable that resulted in failure to pad a value with nulls on IRIX.
1715 
1716 * Fixed ncdump bug adding extra quote to char variable data when using -fc
1717 or -ff option.
1718 
1719 * Fixed so compiling with -DNO\_NETCDF\_2 will work for building without
1720 backward-compatibility netCDF-2 interfaces.
1721 
1722 * Eliminated use of ftruncate(), because it fails on FAT32 file systems
1723 under Linux.
1724 
1725 * Initialized a pointer in putget.m4 (used to generate putget.c) that was
1726 involved in uninitialized memory references when nc\_test is run under
1727 Purify. Two users had reported seeing crashes resulting from this
1728 problem in their applications.
1729 
1730 * Reverted pointer initializations in putget.m4, after testing revealed
1731 these caused a performance problem, resulting in many extra calls to
1732 px\_pgin and px\_pgout when running nc\_test.
1733 
1734 * Added checking of size of "dimids" vector in function
1735 nf90\_inquire\_variable(...) and error-returning if it isn't
1736 sufficiently capacious.
1737 
1738 * Added variable index to ncvarget() and ncattinq() error messages and
1739 attribute name to ncattinq() error message.
1740 
1741 * Tweaked configure script to work with recent C++ compilers.
1742 
1743 * Fixed a memory leak in C++ interface, making sure NcVar::cur\_rec[] gets
1744 deleted in NcVar destructor.
1745 
1746 * Reimplemented nc\_sync() fix of version 3.5.0 to eliminate performance
1747 penalty when synchronization is unnecessary.
1748 
1749 * Changed order of targets in Makefile to build Fortran interface last, as
1750 a workaround for problem with make on AIX platforms.
1751 
1752 ## 3.5.0 2001-03-23
1753 
1754 * Added Fortran 90 interface.
1755 
1756 * Changed C macro TIMELEN in file cxx/nctst.cpp to TIMESTRINGLEN to avoid
1757 clash with macro defined on AIX systems in /usr/include/time.h.
1758 
1759 * Fixed miswriting of netCDF header when exiting define mode. Because the
1760 header was always written correctly later, this was only a problem if
1761 there was another reader of the netCDF file.
1762 
1763 * Fixed explicit synchronizing between netCDF writer and readers via the
1764 nc\_sync(), nf\_sync(), and ncsync() functions.
1765 
1766 * Fixed a number of bugs related to attempts to support shrinking the
1767 header in netCDF files when attributes are rewritten or deleted. Also
1768 fixed the problem that nc\_\_endef() did not work as intended in
1769 reserving extra space in the file header, since the extra space would be
1770 compacted again on calling nc\_close().
1771 
1772 * Fixed the "redef bug" that occurred when nc\_enddef() or nf\_enddef() is
1773 called after nc\_redef() or nf\_redef(), the file is growing such that
1774 the new beginning of a record variable is in the next "chunk", and the
1775 size of at least one record variable exceeds the chunk size (see
1776 netcdf.3 man page for a description of this tuning parameter and how to
1777 set it). This bug resulted in corruption of some values in other
1778 variables than the one being added.
1779 
1780 * The "\*\*" tuning functions for the Fortran interface, nf\*\*create,
1781 nf\*\*open, and nf\*\*enddef, are now documented in the Fortran interface
1782 man pages.
1783 
1784 * Add an 'uninstall' target to all the Makefiles. Dave Glowacki
1785 <dglo@SSEC.WISC.EDU> 199810011851.MAA27335
1786 
1787 * Added support for multiprocessing on Cray T3E. Hooks added by Glenn, but
1788 the majority of the work was done at NERSC. Also includes changes to
1789 ffio option specification. Patch rollup provided by R. K. Owen
1790 <rkowen@Nersc.GOV>. The following functions are added to the public
1791 interface. nc**create\_mp() nc**open\_mp() nc\_set\_base\_pe()
1792 nc\_inq\_base\_pe()
1793 
1794 * Fixed makefile URL for Win32 systems in INSTALL file.
1795 
1796 * Made test for UNICOS system in the configure script case independent.
1797 
1798 * Ported to the following systems: AIX 4.3 (both /bin/xlc and
1799 /usr/vac/bin/xlc compilers) IRIX 6.5 IRIX64 6.5
1800 
1801 * Changed the extension of C++ files from ".cc" to ".cpp". Renamed the C++
1802 interface header file "netcdfcpp.h" instead of "netcdf.hh", changing
1803 "netcdf.hh" to include "netcdfcpp.h" for backward compatibility.
1804 
1805 * Treat "FreeBSD" systems the same as "BSD/OS" system w.r.t. Fortran and
1806 "whatis" database.
1807 
1808 * Corrected manual pages: corrected spelling of "enddef" (was "endef") and
1809 ensured that the words "index" and "format" will be correctly printed.
1810 
1811 * Updated support for Fortran-calling-C interface by updating
1812 "fortran/cfortran.h" from version 3.9 to version 4.1. This new version
1813 supports the Portland Group Fortran compiler (C macro "pgiFortran") and
1814 the Absoft Pro Fortran compiler (C macro "AbsoftProFortran").
1815 
1816 * Corrected use of non-integral-constant-expression in specifying size of
1817 temporary arrays in file "libsrc/ncx\_cray.c".
1818 
1819 * Added Compaq Alpha Linux workstation example to INSTALL file.
1820 
1821 * Ported cfortran.h to Cygnus GNU Win32 C compiler (gcc for Windows).
1822 
1823 * Fixed bug in ncdump using same CDL header name when called with multiple
1824 files.
1825 
1826 * Added new NULL data type NC\_NAT (Not A Type) to facilitate checking
1827 whether a variable object has had its type defined yet, for example when
1828 working with packed values.
1829 
1830 * Fixed use of compile-time macro NO\_NETCDF\_2 so it really doesn't
1831 include old netCDF-2 interfaces, as intended.
1832 
1833 * Ported to MacOS X Public Beta (Darwin 1.2/PowerPC).
1834 
1835 * Fixed C++ friend declarations to conform to C++ standard.
1836 
1837 * Changed INSTALL file to INSTALL.html instead.
1838 
1839 ## 3.4 1998-03-09
1840 
1841 * Fixed ncx\_cray.c to work on all CRAY systems, not just CRAY1. Reworked
1842 USE\_IEG, which was incorrect. Reworked short support. Now USE\_IEG and
1843 otherwise both pass t\_ncx.
1844 
1845 * To better support parallel systems, static and malloc'ed scratch areas
1846 which were shared in the library were eliminated. These were made
1847 private and on the stack where possible. To support this, the macros
1848 ALLOC\_ONSTACK and FREE\_ONSTACK are defined in onstack.h.
1849 
1850 * The buffered i/o system implementation in posixio.c was reimplemented to
1851 limit the number and size of read() or write() system calls and use
1852 greater reliance on memory to memory copy. This saves a great deal of
1853 wall clock time on slow (NFS) filesystems, especially during
1854 nc\_endef().
1855 
1856 * Added performance tuning "underbar underbar" interfaces nc**open(),
1857 nc**create(), and nc\_\_enddef().
1858 
1859 * The 'sizehint' contract between the higher layers and the ncio layer is
1860 consistently enforced.
1861 
1862 * The C++ interface has been updated so that the deprecated "nclong"
1863 typedef should no longer be required, and casts to nclong no longer
1864 necessary. Just use int or long as appropriate. nclong is still
1865 supported for backwards compatibility.
1866 
1867 * The ncdump utility now displays byte values as signed, even on platforms
1868 where the type corresponding to a C char is unsigned (SGI, for example).
1869 Also the ncdump and ncgen utilities have been updated to display and
1870 accept byte attributes as signed numeric values (with a "b" suffix)
1871 instead of using character constants.
1872 
1873 * In libsrc/error.c:nc\_strerror(int), explain that NC\_EBADTYPE applies
1874 to "\_FillValue type mismatch".
1875 
1876 * Some changes to configure scripts (aclocal.m4), macros.make.in and
1877 ncgen/Makefile to support NEC SUPER-UX 7.2.
1878 
1879 * The "usage" messages of ncgen and ncdump include the string returned
1880 from nc\_inq\_libvers().
1881 
1882 * Corrected some casts in the library so that all phases of the arithmetic
1883 computing file offsets occurs with "off\_t" type. This allows certain
1884 larger netcdf files to be created and read on systems with larger
1885 (64bit) off\_t.
1886 
1887 * In ncgen, multidimensional character variables are now padded to the
1888 length of last dimension, instead of just concatenating them. This
1889 restores an undocumented but convenient feature of ncgen under netCDF-2.
1890 Also, a syntax error is now reliably reported if the netcdf name is
1891 omitted in CDL input.
1892 
1893 * Fortran and C code generated by ncgen for netCDF components whose names
1894 contain "-" characters will now compile and run correctly instead of
1895 causing syntax errors.
1896 
1897 * The library allows "." characters in names as well as "\_" and "-"
1898 characters. A zero length name "" is explicitly not allowed. The ncgen
1899 utility will now permit "." characters in CDL names as well.
1900 
1901 * Memory leaks in the C++ interface NcVar::as\_\*() member functions and
1902 NcFile::add\_var() member function are fixed. The documentation was
1903 fixed where it indicated incorrectly that the library managed value
1904 blocks that the user is actually responsible for deleting.
1905 
1906 * he values of the version 2 Fortran error codes have been modified to
1907 make the version 2 Fortran interface more backward compatible at the
1908 source level.
1909 
1910 * Added support for systems whose Fortran INTEGER*1 and INTEGER*2 types
1911 are equivalent to the C "long" type but whose C "int" and "long" types
1912 differ. An example of such a system is the NEC SX-4 with the "-ew"
1913 option to the f90 compiler (sheesh, what a system!).
1914 
1915 * Fixed Version 2 Fortran compatibility bug: NCVGTG, NCVGGC, NCVPTG, and
1916 NCVPGC didn't work according to the Version 2 documentation if the
1917 innermost mapping value (i.e. IMAP[1]) was zero (indicating that the
1918 netCDF structure of the variable should be used).
1919 
1920 ## 3.3.1 1997-06-16
1921 
1922 * One can now inquire about the number of attributes that a variable has
1923 using the global variable ID.
1924 
1925 * The FORTRAN interface should now work on more systems. In particular:
1926 
1927 * It should now work with FORTRAN compilers whose "integer*1" datatype is
1928 either a C "signed char", "short", or "int" and whose "integer*2"
1929 datatype is either a C "short" or "int".
1930 
1931 * It should now work with FORTRAN compilers that are extremely picky about
1932 source code formatting (e.g. the NAG f90 compiler).
1933 
1934 * The dependency on the non-POSIX utility m4(1) for generating the C and
1935 FORTRAN manual pages has been eliminated.
1936 
1937 * EXTERNAL statements have been added to the FORTRAN include-file
1938 "netcdf.inc" to eliminate excessive warnings about "unused" variables
1939 (which were actually functions) by some compilers (e.g. SunOS 4.1.3's
1940 f77(1) version 1.x).
1941 
1942 * Building the netCDF-3 package no longer requires the existence of the
1943 Standard C macro RAND\_MAX.
1944 
1945 * Fixed an ncdump bug resulting in ncdump reporting Attempt to convert
1946 between text & numbers when \_FillValue attribute of a character
1947 variable set to the empty string "".
1948 
1949 * Made ncgen tests more stringent and fixed various bugs this uncovered.
1950 These included bugs in handling byte attributes on platforms on which
1951 char is unsigned, initializing scalar character variables in generated C
1952 code under "-c" option, interspersing DATA statements with declaration
1953 statements in generated Fortran code under "-f" option, handling empty
1954 string as a value correctly in generated C and Fortran, and handling
1955 escape characters in strings. The Fortran output under the "-f" option
1956 was also made less obscure and more portable, using automatic conversion
1957 with netCDF-3 interfaces instead of "BYTE", "INTEGER*1", or "INTEGER*2"
1958 declarations.
1959 
1960 * Fixed a C++ interface problem that prevented compiling the C++ library
1961 with Digital's cxx compiler.
1962 
1963 * Made ncgen "make test" report failure and stop if test resulted in a
1964 failure of generated C or Fortran code.
1965 
1966 * The file that you are now reading was created to contain a high-level
1967 description of the evolution of the netCDF-3 package.
1968 
1969 ## 3.3 1997-05-15
1970 
1971 * The production version of the netCDF-3 package was released.
1972 
1973 * A comparison of the netCDF-2 and netCDF-3 releases can be found in the
1974 file COMPATIBILITY.
1975 
1976 */

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