I *think* that AC_USE_SYSTEM_EXTENSIONS has a bug; it seems to ignore conditionals. E.G., given this configure.ac: ==== AC_PREREQ([2.63]) AC_INIT([bug], [0.01]) AC_CONFIG_HEADERS([config.h]) AS_IF([test 0 = 1 ], [AC_USE_SYSTEM_EXTENSIONS]) AC_OUTPUT ==== The file "config.h" still enables extensions, even though the test is false. I'm trying to conditionally use extensions like this: AS_IF([test "$enable_all_system_extensions" = "yes"], [AC_USE_SYSTEM_EXTENSIONS]) Am I going about this the wrong way? Suggestions welcome. --- David A. Wheeler _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf