> How can I achieve this with autoconf? I mean: I know how to write a test like > > AC_CHECK_HEADER(superlu/slu_util.h, foo, bar), > > but how do I obtain (in 'foo') the path relative to which the file superlu/slu_util.h > was found? Use the optional third and forth arguments. Run the macro several times checking for a different prefix each time. Keep track of which one succeeds. Fail only if all checks fail. - Rhys _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf