Hello, I'm getting a false negative when trying to test if a set contains a key. The key is specified as a variable in configure.ac. Can you please take a look at the following code snippet? m4_set_add([food], [fish]) m4_set_add([food], [steak]) m4_set_add([food], [junk]) meal=junk AC_MSG_CHECKING([whether we have junk food for dinner]) m4_set_contains([food], [$meal], [VAL="yes"], [VAL="no"]) AC_MSG_RESULT([${VAL}]) Unfortunately is says that I will be eating healthy food tonight and I really don't know why. Many thanks, Petre _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf