Mercurial > gnulib
view m4/fopen.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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# fopen.m4 serial 9 dnl Copyright (C) 2007-2013 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. AC_DEFUN([gl_FUNC_FOPEN], [ AC_REQUIRE([gl_STDIO_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) case "$host_os" in mingw* | pw*) dnl Replace fopen, for handling of "/dev/null". REPLACE_FOPEN=1 dnl fopen on mingw also has the trailing slash bug. gl_cv_func_fopen_slash="guessing no" ;; *) dnl fopen("foo/", "w") should not create a file when the file name has a dnl trailing slash. AC_CACHE_CHECK([whether fopen recognizes a trailing slash], [gl_cv_func_fopen_slash], [ AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #include <stddef.h> #include <stdio.h> int main () { return fopen ("conftest.sl/", "w") != NULL; }]])], [gl_cv_func_fopen_slash=yes], [gl_cv_func_fopen_slash=no], [ changequote(,)dnl case "$host_os" in aix* | hpux* | solaris2.[0-9] | solaris2.[0-9].*) gl_cv_func_fopen_slash="guessing no" ;; *) gl_cv_func_fopen_slash="guessing yes" ;; esac changequote([,])dnl ]) rm -f conftest.sl ]) ;; esac case "$gl_cv_func_fopen_slash" in *no) AC_DEFINE([FOPEN_TRAILING_SLASH_BUG], [1], [Define to 1 if fopen() fails to recognize a trailing slash.]) REPLACE_FOPEN=1 ;; esac ]) # Prerequisites of lib/fopen.c. AC_DEFUN([gl_PREREQ_FOPEN], [:])