TMPDIR

cc normally creates temporary files in the directory /tmp. You can specify another directory by setting the environment variable TMPDIR to the directory of your choice. However, if TMPDIR is not a valid directory, cc uses /tmp. The -xtemp option has precedence over the TMPDIR environment variable.

If you use a Bourne shell, type:

$ TMPDIR=dir; export TMPDIR

If you use a C shell, type:

% setenv TMPDIR dir