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