2010-09-20 10:35:33 +00:00
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# intmax_t.m4 serial 8
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2013-04-11 19:12:46 +00:00
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dnl Copyright (C) 1997-2004, 2006-2007, 2009-2013 Free Software Foundation,
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2010-09-20 10:35:33 +00:00
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dnl Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Paul Eggert.
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AC_PREREQ([2.53])
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# Define intmax_t to 'long' or 'long long'
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# if it is not already defined in <stdint.h> or <inttypes.h>.
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AC_DEFUN([gl_AC_TYPE_INTMAX_T],
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[
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dnl For simplicity, we assume that a header file defines 'intmax_t' if and
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dnl only if it defines 'uintmax_t'.
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AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
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AC_REQUIRE([gl_AC_HEADER_STDINT_H])
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if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then
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AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
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test $ac_cv_type_long_long_int = yes \
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&& ac_type='long long' \
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|| ac_type='long'
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AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
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[Define to long or long long if <inttypes.h> and <stdint.h> don't define.])
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else
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AC_DEFINE([HAVE_INTMAX_T], [1],
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[Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
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fi
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])
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dnl An alternative would be to explicitly test for 'intmax_t'.
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AC_DEFUN([gt_AC_TYPE_INTMAX_T],
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[
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AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
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AC_REQUIRE([gl_AC_HEADER_STDINT_H])
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AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <stddef.h>
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#include <stdlib.h>
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#if HAVE_STDINT_H_WITH_UINTMAX
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#include <stdint.h>
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#endif
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#if HAVE_INTTYPES_H_WITH_UINTMAX
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#include <inttypes.h>
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#endif
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]],
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[[intmax_t x = -1; return !x;]])],
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[gt_cv_c_intmax_t=yes],
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[gt_cv_c_intmax_t=no])])
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if test $gt_cv_c_intmax_t = yes; then
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AC_DEFINE([HAVE_INTMAX_T], [1],
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[Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
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else
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AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
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test $ac_cv_type_long_long_int = yes \
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&& ac_type='long long' \
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|| ac_type='long'
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AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
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[Define to long or long long if <stdint.h> and <inttypes.h> don't define.])
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fi
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])
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