1# intmax_t.m4 serial 5 2dnl Copyright (C) 1997-2004, 2006 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Paul Eggert. 8 9AC_PREREQ(2.13) 10 11# Define intmax_t to 'long' or 'long long' 12# if it is not already defined in <stdint.h> or <inttypes.h>. 13 14AC_DEFUN([gl_AC_TYPE_INTMAX_T], 15[ 16 dnl For simplicity, we assume that a header file defines 'intmax_t' if and 17 dnl only if it defines 'uintmax_t'. 18 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) 19 AC_REQUIRE([gl_AC_HEADER_STDINT_H]) 20 if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then 21 AC_REQUIRE([gl_AC_TYPE_LONG_LONG]) 22 test $ac_cv_type_long_long = yes \ 23 && ac_type='long long' \ 24 || ac_type='long' 25 AC_DEFINE_UNQUOTED(intmax_t, $ac_type, 26 [Define to long or long long if <inttypes.h> and <stdint.h> don't define.]) 27 else 28 AC_DEFINE(HAVE_INTMAX_T, 1, 29 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 30 fi 31]) 32 33dnl An alternative would be to explicitly test for 'intmax_t'. 34 35AC_DEFUN([gt_AC_TYPE_INTMAX_T], 36[ 37 AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) 38 AC_REQUIRE([gl_AC_HEADER_STDINT_H]) 39 AC_CACHE_CHECK(for intmax_t, gt_cv_c_intmax_t, 40 [AC_TRY_COMPILE([ 41#include <stddef.h> 42#include <stdlib.h> 43#if HAVE_STDINT_H_WITH_UINTMAX 44#include <stdint.h> 45#endif 46#if HAVE_INTTYPES_H_WITH_UINTMAX 47#include <inttypes.h> 48#endif 49], [intmax_t x = -1; return !x;], gt_cv_c_intmax_t=yes, gt_cv_c_intmax_t=no)]) 50 if test $gt_cv_c_intmax_t = yes; then 51 AC_DEFINE(HAVE_INTMAX_T, 1, 52 [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.]) 53 else 54 AC_REQUIRE([gl_AC_TYPE_LONG_LONG]) 55 test $ac_cv_type_long_long = yes \ 56 && ac_type='long long' \ 57 || ac_type='long' 58 AC_DEFINE_UNQUOTED(intmax_t, $ac_type, 59 [Define to long or long long if <stdint.h> and <inttypes.h> don't define.]) 60 fi 61]) 62