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
49
50
51
52
53
|
# strndup.m4 serial 14
dnl Copyright (C) 2002-2003, 2005-2007 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_STRNDUP],
[
dnl Persuade glibc <string.h> to declare strndup().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
AC_CHECK_DECLS_ONCE([strndup])
if test $ac_cv_have_decl_strndup = no; then
HAVE_DECL_STRNDUP=0
fi
# AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'.
AC_CACHE_CHECK([for working strndup], gl_cv_func_strndup,
[AC_RUN_IFELSE([
AC_LANG_PROGRAM([#include <string.h>
#include <stdlib.h>], [[
#ifndef HAVE_DECL_STRNDUP
extern char *strndup (const char *, size_t);
#endif
char *s;
s = strndup ("some longer string", 15);
free (s);
s = strndup ("shorter string", 13);
return s[13] != '\0';]])],
[gl_cv_func_strndup=yes],
[gl_cv_func_strndup=no],
[AC_CHECK_FUNC([strndup],
[AC_EGREP_CPP([too risky], [
#ifdef _AIX
too risky
#endif
],
[gl_cv_func_strndup=no],
[gl_cv_func_strndup=yes])],
[gl_cv_func_strndup=no])])])
if test $gl_cv_func_strndup = yes; then
AC_DEFINE([HAVE_STRNDUP], 1,
[Define if you have the strndup() function and it works.])
else
HAVE_STRNDUP=0
AC_LIBOBJ([strndup])
gl_PREREQ_STRNDUP
fi
])
# Prerequisites of lib/strndup.c.
AC_DEFUN([gl_PREREQ_STRNDUP], [:])
|