mirror of https://github.com/bazelbuild/rules_cc
185 lines
7.5 KiB
Python
185 lines
7.5 KiB
Python
# pylint: disable=g-bad-file-header
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# Copyright 2016 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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"""Configuring the C++ toolchain on macOS."""
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load("@bazel_tools//tools/osx:xcode_configure.bzl", "run_xcode_locator")
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load(
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":lib_cc_configure.bzl",
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"escape_string",
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"resolve_labels",
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"write_builtin_include_directory_paths",
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)
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load(
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":unix_cc_configure.bzl",
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"configure_unix_toolchain",
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"get_env",
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"get_escaped_cxx_inc_directories",
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)
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def _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains):
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"""Compute the list of default C++ include paths on Xcode-enabled darwin.
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Args:
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repository_ctx: The repository context.
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cc: The default C++ compiler on the local system.
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xcode_toolchains: A list containing the xcode toolchains available
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Returns:
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include_paths: A list of builtin include paths.
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"""
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# TODO(cparsons): Falling back to the default C++ compiler builtin include
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# paths shouldn't be unnecessary once all actions are using xcrun.
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include_dirs = get_escaped_cxx_inc_directories(repository_ctx, cc, "-xc++")
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for toolchain in xcode_toolchains:
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include_dirs.append(escape_string(toolchain.developer_dir))
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# Assume that all paths that point to /Applications/ are built in include paths
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include_dirs.append("/Applications/")
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return include_dirs
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def compile_cc_file(repository_ctx, src_name, out_name):
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xcrun_result = repository_ctx.execute([
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"env",
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"-i",
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"xcrun",
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"--sdk",
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"macosx",
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"clang",
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"-mmacosx-version-min=10.9",
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"-std=c++11",
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"-lc++",
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"-o",
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out_name,
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src_name,
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], 30)
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if (xcrun_result.return_code != 0):
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error_msg = (
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"return code {code}, stderr: {err}, stdout: {out}"
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).format(
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code = xcrun_result.return_code,
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err = xcrun_result.stderr,
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out = xcrun_result.stdout,
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)
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fail(out_name + " failed to generate. Please file an issue at " +
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"https://github.com/bazelbuild/bazel/issues with the following:\n" +
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error_msg)
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def configure_osx_toolchain(repository_ctx, overriden_tools):
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"""Configure C++ toolchain on macOS.
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Args:
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repository_ctx: The repository context.
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overriden_tools: dictionary of overriden tools.
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"""
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paths = resolve_labels(repository_ctx, [
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"@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl",
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"@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl",
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"@rules_cc//cc/private/toolchain:libtool_check_unique.cc",
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"@bazel_tools//tools/objc:libtool.sh",
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"@bazel_tools//tools/objc:make_hashed_objlist.py",
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"@bazel_tools//tools/objc:xcrunwrapper.sh",
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"@bazel_tools//tools/osx/crosstool:BUILD.tpl",
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"@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl",
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"@bazel_tools//tools/osx/crosstool:wrapped_clang.cc",
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"@bazel_tools//tools/osx:xcode_locator.m",
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])
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env = repository_ctx.os.environ
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should_use_xcode = "BAZEL_USE_XCODE_TOOLCHAIN" in env and env["BAZEL_USE_XCODE_TOOLCHAIN"] == "1"
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xcode_toolchains = []
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# Make the following logic in sync with @rules_cc//cc/private/toolchain:cc_configure.bzl#cc_autoconf_toolchains_impl
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(xcode_toolchains, xcodeloc_err) = run_xcode_locator(
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repository_ctx,
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paths["@bazel_tools//tools/osx:xcode_locator.m"],
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)
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if should_use_xcode and not xcode_toolchains:
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fail("BAZEL_USE_XCODE_TOOLCHAIN is set to 1 but Bazel couldn't find Xcode installed on the " +
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"system. Verify that 'xcode-select -p' is correct.")
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if xcode_toolchains:
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# For Xcode toolchains, there's no reason to use anything other than
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# wrapped_clang, so that we still get the Bazel Xcode placeholder
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# substitution and other behavior for actions that invoke this
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# cc_wrapper.sh script. The wrapped_clang binary is already hardcoded
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# into the Objective-C crosstool actions, anyway, so this ensures that
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# the C++ actions behave consistently.
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cc = repository_ctx.path("wrapped_clang")
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cc_path = '"$(/usr/bin/dirname "$0")"/wrapped_clang'
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repository_ctx.template(
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"cc_wrapper.sh",
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paths["@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl"],
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{
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"%{cc}": escape_string(cc_path),
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"%{env}": escape_string(get_env(repository_ctx)),
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},
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)
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repository_ctx.symlink(
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paths["@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl"],
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"armeabi_cc_toolchain_config.bzl",
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)
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repository_ctx.symlink(
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paths["@bazel_tools//tools/objc:xcrunwrapper.sh"],
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"xcrunwrapper.sh",
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)
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repository_ctx.symlink(
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paths["@bazel_tools//tools/objc:libtool.sh"],
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"libtool",
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)
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repository_ctx.symlink(
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paths["@bazel_tools//tools/objc:make_hashed_objlist.py"],
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"make_hashed_objlist.py",
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)
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repository_ctx.symlink(
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paths["@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl"],
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"cc_toolchain_config.bzl",
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)
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libtool_check_unique_src_path = str(repository_ctx.path(
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paths["@rules_cc//cc/private/toolchain:libtool_check_unique.cc"],
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))
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compile_cc_file(repository_ctx, libtool_check_unique_src_path, "libtool_check_unique")
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wrapped_clang_src_path = str(repository_ctx.path(
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paths["@bazel_tools//tools/osx/crosstool:wrapped_clang.cc"],
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))
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compile_cc_file(repository_ctx, wrapped_clang_src_path, "wrapped_clang")
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repository_ctx.symlink("wrapped_clang", "wrapped_clang_pp")
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tool_paths = {}
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gcov_path = repository_ctx.os.environ.get("GCOV")
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if gcov_path != None:
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if not gcov_path.startswith("/"):
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gcov_path = repository_ctx.which(gcov_path)
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tool_paths["gcov"] = gcov_path
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escaped_include_paths = _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains)
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write_builtin_include_directory_paths(repository_ctx, cc, escaped_include_paths)
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escaped_cxx_include_directories = []
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for path in escaped_include_paths:
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escaped_cxx_include_directories.append((" \"%s\"," % path))
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if xcodeloc_err:
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escaped_cxx_include_directories.append("# Error: " + xcodeloc_err + "\n")
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repository_ctx.template(
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"BUILD",
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paths["@bazel_tools//tools/osx/crosstool:BUILD.tpl"],
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{
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"%{cxx_builtin_include_directories}": "\n".join(escaped_cxx_include_directories),
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"%{tool_paths_overrides}": ",\n ".join(
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['"%s": "%s"' % (k, v) for k, v in tool_paths.items()],
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),
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},
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)
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else:
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configure_unix_toolchain(repository_ctx, cpu_value = "darwin", overriden_tools = overriden_tools)
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