I have seen the thread at http://www.mail-archive.com/bug-autoconf@xxxxxxx/msg03051.html already, though there is a case where the warning persists: configure.ac:4: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body ../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from... ../../lib/autoconf/general.m4:2662: _AC_LINK_IFELSE is expanded from... ../../lib/autoconf/general.m4:2679: AC_LINK_IFELSE is expanded from... configure.ac:4: the top level AC_INIT([foo],[0]) AC_PROG_CC AC_MSG_CHECKING([foo]) AC_LINK_IFELSE(AC_LANG_SOURCE([int main(void) { return 0; }])) Adding [ ] around AC_LANG_SOURCE would fix it, but I don't see this extra quoting being normally required. Can someone elaborate? _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf