mirror of
https://github.com/bazelbuild/rules_cc
synced 2024-11-28 21:34:00 +00:00
bc665f9271
*** Reason for rollback *** Broke a test *** Original change description *** The auto-configured toolchains provided by Bazel itself have diverged heavily from the version maintained in this repo. There is no need to maintain this duplication until Starlarkification has progressed succiciently for rules_cc to be the source of truth for them. This is particularly relevant for Bzlmod, which currently uses the toolchains defined in rules_cc. As a result, Bazel C++ builds will use subtly different toolchains depending on whether --enable_bzlmod is used or not. This is fixed... *** PiperOrigin-RevId: 501228335 Change-Id: I858dc3ea44df7ae70b5603f6dc2e082b4540c42a
120 lines
3.4 KiB
Smarty
120 lines
3.4 KiB
Smarty
#!/bin/bash
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#
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# Copyright 2015 The Bazel Authors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# OS X relpath is not really working. This is a wrapper script around gcc
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# to simulate relpath behavior.
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#
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# This wrapper uses install_name_tool to replace all paths in the binary
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# (bazel-out/.../path/to/original/library.so) by the paths relative to
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# the binary. It parses the command line to behave as rpath is supposed
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# to work.
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#
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# See https://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac
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# on how to set those paths for Mach-O binaries.
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#
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set -eu
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INSTALL_NAME_TOOL="/usr/bin/install_name_tool"
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LIBS=
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LIB_DIRS=
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RPATHS=
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OUTPUT=
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function parse_option() {
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local -r opt="$1"
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if [[ "${OUTPUT}" = "1" ]]; then
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OUTPUT=$opt
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elif [[ "$opt" =~ ^-l(.*)$ ]]; then
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LIBS="${BASH_REMATCH[1]} $LIBS"
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elif [[ "$opt" =~ ^-L(.*)$ ]]; then
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LIB_DIRS="${BASH_REMATCH[1]} $LIB_DIRS"
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elif [[ "$opt" =~ ^-Wl,-rpath,\@loader_path/(.*)$ ]]; then
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RPATHS="${BASH_REMATCH[1]} ${RPATHS}"
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elif [[ "$opt" = "-o" ]]; then
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# output is coming
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OUTPUT=1
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fi
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}
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# let parse the option list
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for i in "$@"; do
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if [[ "$i" = @* ]]; then
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while IFS= read -r opt
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do
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parse_option "$opt"
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done < "${i:1}" || exit 1
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else
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parse_option "$i"
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fi
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done
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# Set-up the environment
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%{env}
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# Call the C++ compiler
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%{cc} "$@"
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function get_library_path() {
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for libdir in ${LIB_DIRS}; do
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if [ -f ${libdir}/lib$1.so ]; then
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echo "${libdir}/lib$1.so"
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elif [ -f ${libdir}/lib$1.dylib ]; then
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echo "${libdir}/lib$1.dylib"
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fi
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done
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}
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# A convenient method to return the actual path even for non symlinks
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# and multi-level symlinks.
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function get_realpath() {
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local previous="$1"
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local next=$(readlink "${previous}")
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while [ -n "${next}" ]; do
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previous="${next}"
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next=$(readlink "${previous}")
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done
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echo "${previous}"
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}
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# Get the path of a lib inside a tool
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function get_otool_path() {
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# the lib path is the path of the original lib relative to the workspace
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get_realpath $1 | sed 's|^.*/bazel-out/|bazel-out/|'
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}
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# Do replacements in the output
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for rpath in ${RPATHS}; do
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for lib in ${LIBS}; do
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unset libname
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if [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.so" ]; then
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libname="lib${lib}.so"
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elif [ -f "$(dirname ${OUTPUT})/${rpath}/lib${lib}.dylib" ]; then
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libname="lib${lib}.dylib"
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fi
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# ${libname-} --> return $libname if defined, or undefined otherwise. This is to make
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# this set -e friendly
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if [[ -n "${libname-}" ]]; then
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libpath=$(get_library_path ${lib})
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if [ -n "${libpath}" ]; then
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${INSTALL_NAME_TOOL} -change $(get_otool_path "${libpath}") \
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"@loader_path/${rpath}/${libname}" "${OUTPUT}"
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fi
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fi
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done
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done
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