[In case you receive this mulitple times, sorry for that.] In my configure.ac file I have AC_PROG_CC AC_PROG_CPP AC_TYPE_UINT64_T In my C file I have #include <config.h> #if HAVE_STDINT_H # include <stdint.h> #endif #if defined UINT64_MAX || defined uint64_t typedef uint64_t TA_ULongLong; #else # error "No unsigned 64bit wide data type found." #endif following the advice given in the autoconf info file, and everything's fine if I compile with gcc. Configuring with CC=g++ (I have version 4.6.2) on my GNU/Linux box works just fine, however, compilation of the above snippet fails with error: #error "No unsigned 64bit wide data type found." How comes? Werner _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf