On Fri, 30 Aug 2019, Quaquaraqua wrote:
Hi there, how can we check if a macro has been previously defined with AC_DEFINE ? For instance, something like the following piece of code: AX_OPENMP dnl it sets AC_DEFINE(HAVE_OPENMP,1) in case of success ... m4_ifdef([[HAVE_OPENMP]], dnl how to check if HAVE_OPENMP has been defined? [ ... do something ... ], [ ... do something else ... ] ) I'm aware that, as workaround, AX_OPENMP can take two optional arguments, ACTION-IF-FOUND and ACTION-IF-NOT-FOUND but I am restricted to use them atm.
It seems that cached test results are normally stored in variables of the form "ac_cv_have_FOO". Check the generated config.status script for the exact name to test.
Bob -- Bob Friesenhahn bfriesen@xxxxxxxxxxxxxxxxxxx, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ Public Key, http://www.simplesystems.org/users/bfriesen/public-key.txt _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
