1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
# memalign.m4 serial 1
dnl Copyright (C) 2020-2023 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_MEMALIGN],
[
AC_REQUIRE([gl_MALLOC_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([memalign])
if test $ac_cv_func_memalign = yes; then
dnl On Solaris 11, memalign (2, n) always returns NULL.
AC_CACHE_CHECK([whether memalign works for small alignments],
[gl_cv_func_memalign_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <malloc.h>
#include <stdlib.h>
]],
[[int result = 0;
if (memalign (1, 1) == NULL)
result |= 1;
if (memalign (2, 1) == NULL)
result |= 2;
return result;
]])
],
[gl_cv_func_memalign_works=yes],
[gl_cv_func_memalign_works=no],
[case "$host_os" in
# Guess no on Solaris.
solaris*) gl_cv_func_memalign_works="guessing no" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_memalign_works="$gl_cross_guess_normal" ;;
esac
])
])
case "$gl_cv_func_memalign_works" in
*yes) ;;
*) REPLACE_MEMALIGN=1 ;;
esac
else
dnl The system does not have memalign.
HAVE_MEMALIGN=0
fi
])
|
