m4/strnlen.m4

   1 # strnlen.m4 serial 2
   2 dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8
   9 AC_DEFUN([gl_FUNC_STRNLEN],
  10 [
  11   dnl Persuade glibc <string.h> to declare strnlen().
  12   AC_REQUIRE([AC_GNU_SOURCE])
  13
  14   AC_FUNC_STRNLEN
  15   if test $ac_cv_func_strnlen_working = no; then
  16     # This is necessary because automake-1.6.1 doens't understand
  17     # that the above use of AC_FUNC_STRNLEN means we may have to use
  18     # lib/strnlen.c.
  19     #AC_LIBOBJ(strnlen)
  20     AC_DEFINE(strnlen, rpl_strnlen,
  21       [Define to rpl_strnlen if the replacement function should be used.])
  22     gl_PREREQ_STRNLEN
  23   fi
  24 ])
  25
  26 # Prerequisites of lib/strnlen.c.
  27 AC_DEFUN([gl_PREREQ_STRNLEN], [
  28   AC_REQUIRE([AC_HEADER_STDC])
  29   AC_CHECK_HEADERS_ONCE(memory.h string.h)
  30   AC_CHECK_DECLS(memchr)
  31 ])
  32