1# intmax_t.m4 serial 9 2dnl Copyright (C) 1997-2004, 2006-2007, 2009-2020 Free Software Foundation, 3dnl Inc. 4dnl This file is free software; the Free Software Foundation 5dnl gives unlimited permission to copy and/or distribute it, 6dnl with or without modifications, as long as this notice is preserved. 7 8dnl From Paul Eggert. 9 10AC_PREREQ([2.53]) 11 12# Define intmax_t to 'long' or 'long long' 13# if it is not already defined in <stdint.h> or <inttypes.h>. 14 15AC_DEFUN([gl_AC_TYPE_INTMAX_T], 16[ 17 dnl For simplicity, we assume that a header file defines 'intmax_t' if and 18 dnl only if it defines 'uintmax_t'. 19 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) 20 AC_REQUIRE([gl_AC_HEADER_STDINT_H]) 21 if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then 22 AC_DEFINE_UNQUOTED([intmax_t], [long long], 23 [Define to long or long long if <inttypes.h> and <stdint.h> don't define.]) 24 else 25 AC_DEFINE([HAVE_INTMAX_T], [1], 26 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 27 fi 28]) 29 30dnl An alternative would be to explicitly test for 'intmax_t'. 31 32AC_DEFUN([gt_AC_TYPE_INTMAX_T], 33[ 34 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) 35 AC_REQUIRE([gl_AC_HEADER_STDINT_H]) 36 AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t], 37 [AC_COMPILE_IFELSE( 38 [AC_LANG_PROGRAM( 39 [[ 40#include <stddef.h> 41#include <stdlib.h> 42#if HAVE_STDINT_H_WITH_UINTMAX 43#include <stdint.h> 44#endif 45#if HAVE_INTTYPES_H_WITH_UINTMAX 46#include <inttypes.h> 47#endif 48 ]], 49 [[intmax_t x = -1; return !x;]])], 50 [gt_cv_c_intmax_t=yes], 51 [gt_cv_c_intmax_t=no])]) 52 if test $gt_cv_c_intmax_t = yes; then 53 AC_DEFINE([HAVE_INTMAX_T], [1], 54 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 55 else 56 AC_DEFINE_UNQUOTED([intmax_t], [long long], 57 [Define to long or long long if <stdint.h> and <inttypes.h> don't define.]) 58 fi 59]) 60