-# strndup.m4 serial 6
-dnl Copyright (C) 2002-2003, 2005-2006 Free Software Foundation, Inc.
+# strndup.m4 serial 13
+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],
[
- AC_LIBSOURCES([strndup.c, strndup.h])
-
dnl Persuade glibc <string.h> to declare strndup().
AC_REQUIRE([AC_GNU_SOURCE])
+ 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 5.1 fails to add the terminating '\0'.
+ # 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>], [[
+ AC_LANG_PROGRAM([#include <string.h>
+ #include <stdlib.h>], [[
#ifndef HAVE_DECL_STRNDUP
extern char *strndup (const char *, size_t);
#endif
return s[13] != '\0';]])],
[gl_cv_func_strndup=yes],
[gl_cv_func_strndup=no],
- [AC_EGREP_CPP([too risky], [
+ [AC_CHECK_FUNC([strndup],
+ [AC_EGREP_CPP([too risky], [
#ifdef _AIX
- too risky
+ too risky
#endif
- ],
- [gl_cv_func_strndup=no],
- [gl_cv_func_strndup=yes])])])
+ ],
+ [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])
- AC_DEFINE(strndup, rpl_strndup,
- [Define to rpl_strndup if the replacement function should be used,])
gl_PREREQ_STRNDUP
fi
])