m4/inttypes_h.m4

   1 #serial 2
   2
   3 dnl From Paul Eggert.
   4
   5 # Define HAVE_INTTYPES_H if <inttypes.h> exists,
   6 # doesn't clash with <sys/types.h>, and declares uintmax_t.
   7
   8 AC_DEFUN(jm_AC_HEADER_INTTYPES_H,
   9 [
  10   if test x = y; then
  11     dnl This code is deliberately never run via ./configure.
  12     dnl FIXME: this is a gross hack to make autoheader put an entry
  13     dnl for `HAVE_INTTYPES_H' in config.h.in.
  14     AC_CHECK_FUNCS(INTTYPES_H)
  15   fi
  16   AC_CACHE_CHECK([for inttypes.h], jm_ac_cv_header_inttypes_h,
  17   [AC_TRY_COMPILE(
  18     [#include <sys/types.h>
  19 #include <inttypes.h>],
  20     [uintmax_t i = (uintmax_t) -1;],
  21     jm_ac_cv_header_inttypes_h=yes,
  22     jm_ac_cv_header_inttypes_h=no)])
  23   if test $jm_ac_cv_header_inttypes_h = yes; then
  24     ac_kludge=HAVE_INTTYPES_H
  25     AC_DEFINE_UNQUOTED($ac_kludge)
  26   fi
  27 ])