| # |
| # Copyright 2015-2016 Nest Labs Inc. All Rights Reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| # |
| # Description: |
| # This file defines a GNU autoconf M4-style macro for checking |
| # for a build host-based tool that can shadow a directory using |
| # symbolic links, ostensibly either GNU cp or X11 lndir. |
| # |
| |
| AC_DEFUN([_NL_CHECK_CP_RS], |
| [ |
| $1 -Rs 2>&1 | grep 'missing file operand' > /dev/null |
| ]) |
| |
| AC_DEFUN([_NL_CHECK_LNDIR], |
| [ |
| $1 -silent 2>&1 | grep 'usage: lndir' > /dev/null |
| ]) |
| |
| # |
| # NL_PROG_LNDIR([fallback GNU cp path to test, fallback GNU cp path to set]) |
| # |
| # test path - The fallback GNU cp path and arguments to test if a system |
| # GNU cp cannot be found. |
| # set path - The fallback GNU cp path and arguments to set to LNDIR if |
| # the test path succeeds. |
| # |
| # Determine and assign to LNDIR, a build host-based tool that can shadow |
| # a directory using symbolic links, attempting either GNU cp or X11 lndir |
| # as preferred defaults. |
| # |
| # If the host doesn't have GNU cp natively, the caller can specify |
| # both a GNU cp path to test and a GNU cp path to set if the test path |
| # was successful. |
| # |
| # ---------------------------------------------------------------------------- |
| AC_DEFUN([NL_PROG_LNDIR], |
| [ |
| AC_ARG_VAR(LNDIR, [Program and arguments to create a shadow directory of symbolic links to another directory tree (e.g. 'cp -Rs')]) |
| |
| AC_MSG_CHECKING([how to shadow a directory tree]) |
| |
| if test "x${LNDIR}" = "x"; then |
| if `_NL_CHECK_CP_RS(cp)`; then |
| LNDIR="cp -Rs" |
| |
| elif `_NL_CHECK_LNDIR(lndir)`; then |
| LNDIR="lndir -silent" |
| |
| elif `_NL_CHECK_CP_RS($1)`; then |
| LNDIR="$2 -Rs" |
| |
| else |
| AC_MSG_ERROR([Cannot determine how to shadow a directory tree. Neither 'cp -Rs' nor 'lndir -silent' appear to be available or functional. Please consider installing or making available in your PATH one of: GNU coreutils <http://www.gnu.org/software/coreutils/>, XQuartz (Mac OS X-only) <http://xquartz.macosforge.org/>, or lndir <http://www.mit.edu/afs/sipb/project/sipbsrc/rt/lndir/>.]) |
| |
| fi |
| fi |
| |
| AC_MSG_RESULT(${LNDIR}) |
| |
| AC_SUBST(LNDIR) |
| ]) |