[Bug-gnulib] strnlen patch to assume C89 or better

[Bruno Haible]

May I commit this patch?

        * lib/strnlen.c: Include <string.h> unconditionally. Assume it
        declares memchr().
        * m4/strnlen.m4 (gl_PREREQ_STRNLEN): Remove <string.h> related checks.

*** lib/strnlen.c       9 Jul 2003 22:48:53 -0000       1.9
--- lib/strnlen.c       10 Sep 2003 13:47:01 -0000
***************
*** 21,41 ****
  #endif
  #undef strnlen
  
! #if HAVE_STRING_H
! # if !STDC_HEADERS && HAVE_MEMORY_H
! #  include <memory.h>
! # endif
! # include <string.h>
! #else
! # include <strings.h>
! #endif
! 
! #ifndef HAVE_DECL_MEMCHR
! "this configure-time declaration test was not run"
! #endif
! #if !HAVE_DECL_MEMCHR
! char *memchr ();
! #endif
  
  #undef __strnlen
  #undef strnlen
--- 21,27 ----
  #endif
  #undef strnlen
  
! #include <string.h>
  
  #undef __strnlen
  #undef strnlen
*** m4/strnlen.m4       31 Jan 2003 15:47:03 -0000      1.4
--- m4/strnlen.m4       10 Sep 2003 13:47:02 -0000
***************
*** 1,4 ****
! # strnlen.m4 serial 2
  dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
  dnl This file is free software, distributed under the terms of the GNU
  dnl General Public License.  As a special exception to the GNU General
--- 1,4 ----
! # strnlen.m4 serial 3
  dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
  dnl This file is free software, distributed under the terms of the GNU
  dnl General Public License.  As a special exception to the GNU General
***************
*** 24,32 ****
  ])
  
  # Prerequisites of lib/strnlen.c.
! AC_DEFUN([gl_PREREQ_STRNLEN], [
!   AC_REQUIRE([AC_HEADER_STDC])
!   AC_CHECK_HEADERS_ONCE(memory.h string.h)
!   AC_CHECK_DECLS(memchr)
! ])
  
--- 24,28 ----
  ])
  
  # Prerequisites of lib/strnlen.c.
! AC_DEFUN([gl_PREREQ_STRNLEN], [:])