elfutils: inital import

[crossrootfs.git] / patch / strnlen.m4

# strnlen.m4 serial 10
dnl Copyright (C) 2002-2003, 2005-2007, 2009 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_STRNLEN],
[
  dnl Persuade glibc <string.h> to declare strnlen().
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

  dnl AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
  AC_CHECK_DECLS_ONCE([strnlen])
  if test $ac_cv_have_decl_strnlen = no; then
    HAVE_DECL_STRNLEN=0
  fi

  AC_FUNC_STRNLEN
  if test $ac_cv_func_strnlen_working = no; then
    # This is necessary because automake-1.6.1 doesn't understand
    # that the above use of AC_FUNC_STRNLEN means we may have to use
    # lib/strnlen.c.
    AC_LIBOBJ([strnlen])
    AC_DEFINE([strnlen], [rpl_strnlen],
      [Define to rpl_strnlen if the replacement function should be used.])
    gl_PREREQ_STRNLEN
  fi
])

# Prerequisites of lib/strnlen.c.
AC_DEFUN([gl_PREREQ_STRNLEN], [:])