| #!/bin/bash |
| # |
| # Copyright 2015 The Bazel Authors. 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. |
| # |
| # OS X relpath is not really working. This is a wrapper script around gcc |
| # to simulate relpath behavior. |
| # |
| # This wrapper uses install_name_tool to replace all paths in the binary |
| # (bazel-out/.../path/to/original/library.so) by the paths relative to |
| # the binary. It parses the command line to behave as rpath is supposed |
| # to work. |
| # |
| # See https://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac |
| # on how to set those paths for Mach-O binaries. |
| # |
| set -eu |
| |
| INSTALL_NAME_TOOL="/usr/bin/install_name_tool" |
| |
| LIBS= |
| LIB_DIRS= |
| RPATHS= |
| OUTPUT= |
| # let parse the option list |
| for i in "$@"; do |
| if [[ "${OUTPUT}" = "1" ]]; then |
| OUTPUT=$i |
| elif [[ "$i" =~ ^-l(.*)$ ]]; then |
| LIBS="${BASH_REMATCH[1]} $LIBS" |
| elif [[ "$i" =~ ^-L(.*)$ ]]; then |
| LIB_DIRS="${BASH_REMATCH[1]} $LIB_DIRS" |
| elif [[ "$i" =~ ^-Wl,-rpath,\@loader_path/(.*)$ ]]; then |
| RPATHS="${BASH_REMATCH[1]} ${RPATHS}" |
| elif [[ "$i" = "-o" ]]; then |
| # output is coming |
| OUTPUT=1 |
| fi |
| done |
| |
| # Set-up the environment |
| %{env} |
| |
| # Call the C++ compiler |
| %{cc} "$@" |
| |
| function get_library_path() { |
| for libdir in ${LIB_DIRS}; do |
| if [ -f ${libdir}/lib$1.so ]; then |
| echo "${libdir}/lib$1.so" |
| elif [ -f ${libdir}/lib$1.dylib ]; then |
| echo "${libdir}/lib$1.dylib" |
| fi |
| done |
| } |
| |
| # A convenient method to return the actual path even for non symlinks |
| # and multi-level symlinks. |
| function get_realpath() { |
| local previous="$1" |
| local next=$(readlink "${previous}") |
| while [ -n "${next}" ]; do |
| previous="${next}" |
| next=$(readlink "${previous}") |
| done |
| echo "${previous}" |
| } |
| |
| # Get the path of a lib inside a tool |
| function get_otool_path() { |
| # the lib path is the path of the original lib relative to the workspace |
| get_realpath $1 | sed 's|^.*/bazel-out/|bazel-out/|' |
| } |
| |
| # Do replacements in the output |
| for rpath in ${RPATHS}; do |
| for lib in ${LIBS}; do |
| unset libname |
| if [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.so" ]; then |
| libname="lib${lib}.so" |
| elif [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.dylib" ]; then |
| libname="lib${lib}.dylib" |
| fi |
| # ${libname-} --> return $libname if defined, or undefined otherwise. This is to make |
| # this set -e friendly |
| if [[ -n "${libname-}" ]]; then |
| libpath=$(get_library_path ${lib}) |
| if [ -n "${libpath}" ]; then |
| ${INSTALL_NAME_TOOL} -change $(get_otool_path "${libpath}") \ |
| "@loader_path/${rpath}/${libname}" "${OUTPUT}" |
| fi |
| fi |
| done |
| done |
| |