The threading library must be linked to the binaries
using a special linker flag -pthread
on
FreeBSD. If a port insists on linking
-lpthread
or -lc_r
directly, patch it to use PTHREAD_LIBS
variable provided by the ports framework. This variable
usually has the value of -pthread
, but
on certain architectures and FreeBSD versions it can have
different values, so do not just hardcode
-pthread
into patches and always use
PTHREAD_LIBS
.
If building the port errors out with unrecognized
option '-pthread'
when setting
PTHREAD_LIBS
, it may be desirable to use
gcc
as linker by setting
CONFIGURE_ENV
to LD=${CC}
.
The -pthread
option is not supported by
ld
directly.
All FreeBSD documents are available for download at http://ftp.FreeBSD.org/pub/FreeBSD/doc/
Questions that are not answered by the
documentation may be
sent to <freebsd-questions@FreeBSD.org>.
Send questions about this document to <freebsd-doc@FreeBSD.org>.