Hi, In my configure.ac, I have: AC_CHECK_HEADERS([gmp.h], , AC_MSG_ERROR([This package needs libgmp])) AC_CHECK_HEADERS([gmpxx.h], , AC_MSG_ERROR([This package needs libgmpxx])) And when I run ./configure, I have: checking gmp.h usability... yes checking gmp.h presence... yes checking for gmp.h... yes checking gmpxx.h usability... no checking gmpxx.h presence... no checking for gmpxx.h... no configure: error: This package needs libgmpxx However, both gmp.h and gmpxx.h are in /usr/include $ find /usr/include/ -name 'gmp*.h' /usr/include/gmpxx.h /usr/include/gmp.h How the configure can find one but not the other ?! -- Johan _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
