Hi, I naively tried to use AC_CHECK_FILE(S) on /dev/stdin /dev/stdout and /dev/stderr to detect their presence, but the test result is 'no' for these 'files'. The result is 'yes', however, for /dev/null. Is there a more appropriate test for the presence of these special files? or do I need to roll my own macro-test using something like "test -f"? (Or am I checking for something that should/need not be checked?) Suggestions? Thanks! David _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf