This file was obtained from: http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_func_posix_memalign.m4
Signed-off-by: YAMAMOTO Takashi <yamam...@valinux.co.jp> --- m4/ax_func_posix_memalign.m4 | 50 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 m4/ax_func_posix_memalign.m4 diff --git a/m4/ax_func_posix_memalign.m4 b/m4/ax_func_posix_memalign.m4 new file mode 100644 index 0000000..bd60adc --- /dev/null +++ b/m4/ax_func_posix_memalign.m4 @@ -0,0 +1,50 @@ +# =========================================================================== +# http://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 <pa...@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 7 + +AC_DEFUN([AX_FUNC_POSIX_MEMALIGN], +[AC_CACHE_CHECK([for working posix_memalign], + [ax_cv_func_posix_memalign_works], + [AC_TRY_RUN([ +#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 +]) -- 1.8.3.1 _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
