mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-12 10:33:52 +01:00
51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
|
# ===========================================================================
|
||
|
|
# https://www.gnu.org/software/autoconf-archive/ax_func_posix_memalign.html
|
||
|
|
# ===========================================================================
|
||
|
|
#
|
||
|
|
# SYNOPSIS
|
||
|
|
#
|
||
|
|
# AX_FUNC_POSIX_MEMALIGN
|
||
|
|
#
|
||
|
|
# DESCRIPTION
|
||
|
|
#
|
||
|
|
# Some versions of posix_memalign (notably glibc 2.2.5) incorrectly apply
|
||
|
|
# their power-of-two check to the size argument, not the alignment
|
||
|
|
# argument. AX_FUNC_POSIX_MEMALIGN defines HAVE_POSIX_MEMALIGN if the
|
||
|
|
# power-of-two check is correctly applied to the alignment argument.
|
||
|
|
#
|
||
|
|
# LICENSE
|
||
|
|
#
|
||
|
|
# Copyright (c) 2008 Scott Pakin <pakin@uiuc.edu>
|
||
|
|
#
|
||
|
|
# Copying and distribution of this file, with or without modification, are
|
||
|
|
# permitted in any medium without royalty provided the copyright notice
|
||
|
|
# and this notice are preserved. This file is offered as-is, without any
|
||
|
|
# warranty.
|
||
|
|
|
||
|
|
#serial 9
|
||
|
|
|
||
|
|
AC_DEFUN([AX_FUNC_POSIX_MEMALIGN],
|
||
|
|
[AC_CACHE_CHECK([for working posix_memalign],
|
||
|
|
[ax_cv_func_posix_memalign_works],
|
||
|
|
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
main ()
|
||
|
|
{
|
||
|
|
void *buffer;
|
||
|
|
|
||
|
|
/* Some versions of glibc incorrectly perform the alignment check on
|
||
|
|
* the size word. */
|
||
|
|
exit (posix_memalign (&buffer, sizeof(void *), 123) != 0);
|
||
|
|
}
|
||
|
|
]])],
|
||
|
|
[ax_cv_func_posix_memalign_works=yes],
|
||
|
|
[ax_cv_func_posix_memalign_works=no],
|
||
|
|
[ax_cv_func_posix_memalign_works=no])])
|
||
|
|
if test "$ax_cv_func_posix_memalign_works" = "yes" ; then
|
||
|
|
AC_DEFINE([HAVE_POSIX_MEMALIGN], [1],
|
||
|
|
[Define to 1 if `posix_memalign' works.])
|
||
|
|
fi
|
||
|
|
])
|