Hey AC_ARG_WITH sets a variable named loaders and set to (for example) gif,tiff (actually, it's a comma separated list, there can be more than 2 'elements') What I want to do is plitting it into gif and tiff and manipulate those. I know how to do that with m4_foreach ith an m4 list. But i don't know what to do with just a variable. what should i do ? thank you Vincent Torri _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf