view m4/inttypes_h.m4 @ 17364:7524d97ae56f

stdalign: port to stricter ISO C11 ISO C11 says that _Alignof's operand must be a parenthesized type. Problem reported by Eli Zaretskii in <http://lists.gnu.org/archive/html/emacs-devel/2013-03/msg00960.html>. * doc/posix-headers/stdalign.texi (stdalign.h): Document this. * m4/stdalign.m4 (gl_STDALIGN_H): Don't use _Alignof (expr).
author Paul Eggert <eggert@cs.ucla.edu>
date Fri, 29 Mar 2013 19:47:13 -0700
parents e542fd46ad6f
children 344018b6e5d7
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# inttypes_h.m4 serial 10
dnl Copyright (C) 1997-2004, 2006, 2008-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl From Paul Eggert.

# Define HAVE_INTTYPES_H_WITH_UINTMAX if <inttypes.h> exists,
# doesn't clash with <sys/types.h>, and declares uintmax_t.

AC_DEFUN([gl_AC_HEADER_INTTYPES_H],
[
  AC_CACHE_CHECK([for inttypes.h], [gl_cv_header_inttypes_h],
    [AC_COMPILE_IFELSE(
       [AC_LANG_PROGRAM(
          [[
#include <sys/types.h>
#include <inttypes.h>
          ]],
          [[uintmax_t i = (uintmax_t) -1; return !i;]])],
       [gl_cv_header_inttypes_h=yes],
       [gl_cv_header_inttypes_h=no])])
  if test $gl_cv_header_inttypes_h = yes; then
    AC_DEFINE_UNQUOTED([HAVE_INTTYPES_H_WITH_UINTMAX], [1],
      [Define if <inttypes.h> exists, doesn't clash with <sys/types.h>,
       and declares uintmax_t. ])
  fi
])