49 lines
1.4 KiB
Plaintext
49 lines
1.4 KiB
Plaintext
# strndup.m4 serial 11
|
|
dnl Copyright (C) 2002-2003, 2005-2006 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_GNU_SOURCE])
|
|
|
|
AC_CHECK_DECLS_ONCE([strndup])
|
|
|
|
# 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
|
|
AC_LIBOBJ([strndup])
|
|
gl_PREREQ_STRNDUP
|
|
fi
|
|
])
|
|
|
|
# Prerequisites of lib/strndup.c.
|
|
AC_DEFUN([gl_PREREQ_STRNDUP], [:])
|