2
dnl Copyright (C) 2001-2002, 2004-2005 Free Software Foundation, Inc.
3
dnl This file is free software; the Free Software Foundation
4
dnl gives unlimited permission to copy and/or distribute it,
5
dnl with or without modifications, as long as this notice is preserved.
8
dnl Test whether <stdint.h> is supported or must be substituted.
10
AC_DEFUN([gl_STDINT_H],
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[dnl Check for <inttypes.h>.
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AC_REQUIRE([gt_HEADER_INTTYPES_H])
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dnl Check for <sys/inttypes.h>.
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AC_CHECK_HEADERS([sys/inttypes.h])
16
AC_MSG_CHECKING([for stdint.h])
17
AC_CACHE_VAL(gl_cv_header_stdint_h, [
18
AC_TRY_COMPILE([#include <stdint.h>], [],
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gl_cv_header_stdint_h=yes, gl_cv_header_stdint_h=no)])
20
AC_MSG_RESULT([$gl_cv_header_stdint_h])
21
if test $gl_cv_header_stdint_h = yes; then
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AC_DEFINE(HAVE_STDINT_H, 1,
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[Define if you have a working <stdint.h> header file.])
28
dnl Is long == int64_t ?
29
AC_CACHE_CHECK([whether 'long' is 64 bit wide], gl_cv_long_bitsize_64, [
31
#define POW63 ((((((long) 1 << 15) << 15) << 15) << 15) << 3)
32
#define POW64 ((((((long) 1 << 15) << 15) << 15) << 15) << 4)
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typedef int array [2 * (POW63 != 0 && POW64 == 0) - 1];
34
], , gl_cv_long_bitsize_64=yes, gl_cv_long_bitsize_64=no)])
35
if test $gl_cv_long_bitsize_64 = yes; then
40
AC_SUBST(HAVE_LONG_64BIT)
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dnl Is long long == int64_t ?
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AC_CACHE_CHECK([whether 'long long' is 64 bit wide], gl_cv_longlong_bitsize_64, [
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#define POW63 ((((((long long) 1 << 15) << 15) << 15) << 15) << 3)
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#define POW64 ((((((long long) 1 << 15) << 15) << 15) << 15) << 4)
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typedef int array [2 * (POW63 != 0 && POW64 == 0) - 1];
48
], , gl_cv_longlong_bitsize_64=yes, gl_cv_longlong_bitsize_64=no)])
49
if test $gl_cv_longlong_bitsize_64 = yes; then
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HAVE_LONG_LONG_64BIT=1
52
HAVE_LONG_LONG_64BIT=0
54
AC_SUBST(HAVE_LONG_LONG_64BIT)
added
removed
m4/stdint.m4
