Mercurial > gnulib
view m4/getpagesize.m4 @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
# getpagesize.m4 serial 10 dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2019 Free Software Foundation, dnl 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_GETPAGESIZE], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) gl_CHECK_FUNC_GETPAGESIZE if test $gl_cv_func_getpagesize = no; then HAVE_GETPAGESIZE=0 AC_CHECK_HEADERS([OS.h]) if test $ac_cv_header_OS_h = yes; then HAVE_OS_H=1 fi AC_CHECK_HEADERS([sys/param.h]) if test $ac_cv_header_sys_param_h = yes; then HAVE_SYS_PARAM_H=1 fi fi case "$host_os" in mingw*) REPLACE_GETPAGESIZE=1 ;; esac dnl Also check whether it's declared. dnl mingw has getpagesize() in libgcc.a but doesn't declare it. AC_CHECK_DECL([getpagesize], , [HAVE_DECL_GETPAGESIZE=0]) ]) dnl Tests whether the function getpagesize() exists. dnl Sets gl_cv_func_getpagesize. AC_DEFUN([gl_CHECK_FUNC_GETPAGESIZE], [ dnl We can't use AC_CHECK_FUNC here, because getpagesize() is defined as a dnl static inline function when compiling for Android 4.4 or older. AC_CACHE_CHECK([for getpagesize], [gl_cv_func_getpagesize], [AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <unistd.h>]], [[return getpagesize();]]) ], [gl_cv_func_getpagesize=yes], [gl_cv_func_getpagesize=no]) ]) ])