In 2011, there was the following thread started by me: http://lists.gnu.org/archive/html/autoconf/2011-12/msg00002.html The solution that worked eventually was to put AC_PROG_CC AC_PROG_CPP AC_TYPE_UINT64_T into my configure.ac file, and #include <config.h> /* make `stdint.h' define `uintXX_t' for C++ */ #undef __STDC_LIMIT_MACROS #define __STDC_LIMIT_MACROS #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 into my C file. However, this no longer works with g++ 4.7.2. As before, the test in the `configure' script successfully gives checking for uint64_t g++ -c ... conftest.c >&5 configure:12694: $? = 0 configure:12694: result: yes but neither `UINT64_MAX' nor `uint64_t' gets defined, causing error: #error "No unsigned 64bit wide data type found." during compilation. If I have understood the issue correctly, `uint64_t' is no longer a macro in the latest C++ standard, and UINT64_MAX isn't defined either... My solution was to add if test x"$ac_cv_c_uint64_t" = x"yes"; then AC_DEFINE([HAVE_UINT64_T], [1], [Define if compiler accepts uint64_t data type.]) fi to `configure.ac' (immediately after the call to `AC_TYPE_UINT64_T'); the new test in my C file is now #if defined UINT64_MAX || defined uint64_t || defined HAVE_UINT64_T typedef uint64_t TA_ULongLong; ... Please comment. Is there a better solution? Werner _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
