1# intmax_t.m4 serial 7 2dnl Copyright (C) 1997-2004, 2006-2007, 2009-2010 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([2.13]) 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_REQUIRE([AC_TYPE_LONG_LONG_INT]) 23 test $ac_cv_type_long_long_int = yes \ 24 && ac_type='long long' \ 25 || ac_type='long' 26 AC_DEFINE_UNQUOTED([intmax_t], [$ac_type], 27 [Define to long or long long if <inttypes.h> and <stdint.h> don't define.]) 28 else 29 AC_DEFINE([HAVE_INTMAX_T], [1], 30 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 31 fi 32]) 33 34dnl An alternative would be to explicitly test for 'intmax_t'. 35 36AC_DEFUN([gt_AC_TYPE_INTMAX_T], 37[ 38 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) 39 AC_REQUIRE([gl_AC_HEADER_STDINT_H]) 40 AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t], 41 [AC_TRY_COMPILE([ 42#include <stddef.h> 43#include <stdlib.h> 44#if HAVE_STDINT_H_WITH_UINTMAX 45#include <stdint.h> 46#endif 47#if HAVE_INTTYPES_H_WITH_UINTMAX 48#include <inttypes.h> 49#endif 50], [intmax_t x = -1; return !x;], gt_cv_c_intmax_t=yes, gt_cv_c_intmax_t=no)]) 51 if test $gt_cv_c_intmax_t = yes; then 52 AC_DEFINE([HAVE_INTMAX_T], [1], 53 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 54 else 55 AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) 56 test $ac_cv_type_long_long_int = yes \ 57 && ac_type='long long' \ 58 || ac_type='long' 59 AC_DEFINE_UNQUOTED([intmax_t], [$ac_type], 60 [Define to long or long long if <stdint.h> and <inttypes.h> don't define.]) 61 fi 62]) 63