The compilation tools use a temporary directory when processing files:
On Windows platforms, the environment variable
TMPis used to specify the directory to be used for temporary files. If
TMPis not defined, or if it is set to the name of a directory that does not exist, temporary files are created in the current working directory.
On Red Hat Linux platforms, the environment variable
TMPDIRis used to specify the directory to be used for temporary files. If
TMPDIRis not set, a default temporary directory, usually
/var/tmp, is used.
TMPDIR are typically
set up by a system administrator. However, it is permissible for
you to change them.