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# pylint: disable=g-bad-file-header
# Copyright 2016 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.
"""Configuring the C++ toolchain on macOS."""
load("@bazel_tools//tools/osx:xcode_configure.bzl", "run_xcode_locator")
load(
"@bazel_tools//tools/cpp:lib_cc_configure.bzl",
"escape_string",
)
def _get_escaped_xcode_cxx_inc_directories(repository_ctx, xcode_toolchains):
"""Compute the list of default C++ include paths on Xcode-enabled darwin.
Args:
repository_ctx: The repository context.
xcode_toolchains: A list containing the xcode toolchains available
Returns:
include_paths: A list of builtin include paths.
"""
# Assume that everything is managed by Xcode / toolchain installations
include_dirs = [
"/Applications/",
"/Library/",
]
user = repository_ctx.os.environ.get("USER")
if user:
include_dirs.extend([
"/Users/{}/Applications/".format(user),
"/Users/{}/Library/".format(user),
])
# Include extra Xcode paths in case they're installed on other volumes
for toolchain in xcode_toolchains:
include_dirs.append(escape_string(toolchain.developer_dir))
return include_dirs
def _compile_cc_file(repository_ctx, src_name, out_name):
env = repository_ctx.os.environ
xcrun_result = repository_ctx.execute([
"env",
"-i",
"DEVELOPER_DIR={}".format(env.get("DEVELOPER_DIR", default = "")),
"xcrun",
"--sdk",
"macosx",
"clang",
"-mmacosx-version-min=10.15",
"-std=c++17",
"-lc++",
"-arch",
"arm64",
"-arch",
"x86_64",
"-Wl,-no_adhoc_codesign",
"-Wl,-no_uuid",
"-O3",
"-o",
out_name,
src_name,
])
if xcrun_result.return_code != 0:
error_msg = (
"return code {code}, stderr: {err}, stdout: {out}"
).format(
code = xcrun_result.return_code,
err = xcrun_result.stderr,
out = xcrun_result.stdout,
)
fail(out_name + " failed to generate. Please file an issue at " +
"https://github.com/bazelbuild/apple_support/issues with the following:\n" +
error_msg)
xcrun_result = repository_ctx.execute([
"env",
"-i",
"codesign",
"--identifier", # Required to be reproducible across archs
out_name,
"--force",
"--sign",
"-",
out_name,
])
if xcrun_result.return_code != 0:
error_msg = (
"codesign return code {code}, stderr: {err}, stdout: {out}"
).format(
code = xcrun_result.return_code,
err = xcrun_result.stderr,
out = xcrun_result.stdout,
)
fail(out_name + " failed to generate. Please file an issue at " +
"https://github.com/bazelbuild/apple_support/issues with the following:\n" +
error_msg)
def configure_osx_toolchain(repository_ctx):
"""Configure C++ toolchain on macOS.
Args:
repository_ctx: The repository context.
Returns:
Whether or not configuration was successful
"""
# All Label resolutions done at the top of the function to avoid issues
# with starlark function restarts, see this:
# https://github.com/bazelbuild/bazel/blob/ab71a1002c9c53a8061336e40f91204a2a32c38e/tools/cpp/lib_cc_configure.bzl#L17-L38
# for more info
xcode_locator = Label("@bazel_tools//tools/osx:xcode_locator.m")
osx_cc_wrapper = Label("@bazel_tools//tools/cpp:osx_cc_wrapper.sh.tpl")
xcrunwrapper = Label("@build_bazel_apple_support//crosstool:xcrunwrapper.sh")
libtool = Label("@build_bazel_apple_support//crosstool:libtool.sh")
make_hashed_objlist = Label("@build_bazel_apple_support//crosstool:make_hashed_objlist.py")
cc_toolchain_config = Label("@build_bazel_apple_support//crosstool:cc_toolchain_config.bzl")
build_template = Label("@build_bazel_apple_support//crosstool:BUILD.tpl")
libtool_check_unique_src_path = str(repository_ctx.path(
Label("@build_bazel_apple_support//crosstool:libtool_check_unique.cc"),
))
wrapped_clang_src_path = str(repository_ctx.path(
Label("@build_bazel_apple_support//crosstool:wrapped_clang.cc"),
))
xcode_toolchains = []
xcodeloc_err = ""
allow_non_applications_xcode = "BAZEL_ALLOW_NON_APPLICATIONS_XCODE" in repository_ctx.os.environ and repository_ctx.os.environ["BAZEL_ALLOW_NON_APPLICATIONS_XCODE"] == "1"
if allow_non_applications_xcode:
(xcode_toolchains, xcodeloc_err) = run_xcode_locator(repository_ctx, xcode_locator)
if not xcode_toolchains:
return False, xcodeloc_err
# For Xcode toolchains, there's no reason to use anything other than
# wrapped_clang, so that we still get the Bazel Xcode placeholder
# substitution and other behavior for actions that invoke this
# cc_wrapper.sh script. The wrapped_clang binary is already hardcoded
# into the Objective-C crosstool actions, anyway, so this ensures that
# the C++ actions behave consistently.
cc_path = '"$(/usr/bin/dirname "$0")"/wrapped_clang'
repository_ctx.template(
"cc_wrapper.sh",
osx_cc_wrapper,
{
"%{cc}": escape_string(cc_path),
"%{env}": "",
},
)
repository_ctx.symlink(xcrunwrapper, "xcrunwrapper.sh")
repository_ctx.symlink(libtool, "libtool")
repository_ctx.symlink(make_hashed_objlist, "make_hashed_objlist.py")
repository_ctx.symlink(cc_toolchain_config, "cc_toolchain_config.bzl")
_compile_cc_file(repository_ctx, libtool_check_unique_src_path, "libtool_check_unique")
_compile_cc_file(repository_ctx, wrapped_clang_src_path, "wrapped_clang")
repository_ctx.symlink("wrapped_clang", "wrapped_clang_pp")
tool_paths = {}
gcov_path = repository_ctx.os.environ.get("GCOV")
if gcov_path != None:
if not gcov_path.startswith("/"):
gcov_path = repository_ctx.which(gcov_path)
tool_paths["gcov"] = gcov_path
escaped_include_paths = _get_escaped_xcode_cxx_inc_directories(repository_ctx, xcode_toolchains)
escaped_cxx_include_directories = []
for path in escaped_include_paths:
escaped_cxx_include_directories.append((" \"%s\"," % path))
if xcodeloc_err:
escaped_cxx_include_directories.append(" # Error: " + xcodeloc_err)
repository_ctx.template(
"BUILD",
build_template,
{
"%{cxx_builtin_include_directories}": "\n".join(escaped_cxx_include_directories),
"%{tool_paths_overrides}": ",\n ".join(
['"%s": "%s"' % (k, v) for k, v in tool_paths.items()],
),
},
)
return True, ""
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