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These environment variables are referred to by the runtime system.
HOME
Directory in which to look for init files, for example
/home/joe. Under unix HOME
is set by the login shell.
TMPDIR
TEMP
TMP
Directory for various temporary files. The variables are tried in the given order. If none of them is suitable, built-in defaults are used: /var/tmp, /usr/tmp, /tmp.
MITSCHEME_INF_DIRECTORY
Directory containing the debugging information files for the Scheme system. Should contain subdirectories corresponding to the subdirectories in the source tree. By default, the information is searched for on the library path.
MITSCHEME_LOAD_OPTIONS
Specifies the location of the options database file used by the
load-option
procedure. The default is optiondb.scm on
the library path.