| # 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", |
| "resolve_labels", |
| "write_builtin_include_directory_paths", |
| ) |
| load( |
| "@bazel_tools//tools/cpp:unix_cc_configure.bzl", |
| "configure_unix_toolchain", |
| "get_env", |
| "get_escaped_cxx_inc_directories", |
| ) |
| |
| def _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains): |
| """Compute the list of default C++ include paths on Xcode-enabled darwin. |
| |
| Args: |
| repository_ctx: The repository context. |
| cc: The default C++ compiler on the local system. |
| xcode_toolchains: A list containing the xcode toolchains available |
| Returns: |
| include_paths: A list of builtin include paths. |
| """ |
| |
| # TODO(cparsons): Falling back to the default C++ compiler builtin include |
| # paths shouldn't be unnecessary once all actions are using xcrun. |
| include_dirs = get_escaped_cxx_inc_directories(repository_ctx, cc, "-xc++") |
| for toolchain in xcode_toolchains: |
| include_dirs.append(escape_string(toolchain.developer_dir)) |
| |
| # Assume that all paths that point to /Applications/ are built in include paths |
| include_dirs.append("/Applications/") |
| return include_dirs |
| |
| def configure_osx_toolchain(repository_ctx, overriden_tools): |
| """Configure C++ toolchain on macOS.""" |
| paths = resolve_labels(repository_ctx, [ |
| "@bazel_tools//tools/cpp:osx_cc_wrapper.sh.tpl", |
| "@bazel_tools//tools/objc:libtool.sh", |
| "@bazel_tools//tools/objc:make_hashed_objlist.py", |
| "@bazel_tools//tools/objc:xcrunwrapper.sh", |
| "@bazel_tools//tools/osx/crosstool:BUILD.tpl", |
| "@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl", |
| "@bazel_tools//tools/osx/crosstool:wrapped_clang.cc", |
| "@bazel_tools//tools/osx:xcode_locator.m", |
| ]) |
| |
| env = repository_ctx.os.environ |
| should_use_xcode = "BAZEL_USE_XCODE_TOOLCHAIN" in env and env["BAZEL_USE_XCODE_TOOLCHAIN"] == "1" |
| xcode_toolchains = [] |
| |
| # Make the following logic in sync with //tools/cpp:cc_configure.bzl#cc_autoconf_toolchains_impl |
| (xcode_toolchains, xcodeloc_err) = run_xcode_locator( |
| repository_ctx, |
| paths["@bazel_tools//tools/osx:xcode_locator.m"], |
| ) |
| if should_use_xcode and not xcode_toolchains: |
| fail("BAZEL_USE_XCODE_TOOLCHAIN is set to 1 but Bazel couldn't find Xcode installed on the " + |
| "system. Verify that 'xcode-select -p' is correct.") |
| if xcode_toolchains: |
| # 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 = repository_ctx.path("wrapped_clang") |
| |
| cc_path = '"$(/usr/bin/dirname "$0")"/wrapped_clang' |
| repository_ctx.template( |
| "cc_wrapper.sh", |
| paths["@bazel_tools//tools/cpp:osx_cc_wrapper.sh.tpl"], |
| { |
| "%{cc}": escape_string(cc_path), |
| "%{env}": escape_string(get_env(repository_ctx)), |
| }, |
| ) |
| repository_ctx.symlink( |
| paths["@bazel_tools//tools/objc:xcrunwrapper.sh"], |
| "xcrunwrapper.sh", |
| ) |
| repository_ctx.symlink( |
| paths["@bazel_tools//tools/objc:libtool.sh"], |
| "libtool", |
| ) |
| repository_ctx.symlink( |
| paths["@bazel_tools//tools/objc:make_hashed_objlist.py"], |
| "make_hashed_objlist.py", |
| ) |
| repository_ctx.symlink( |
| paths["@bazel_tools//tools/osx/crosstool:cc_toolchain_config.bzl"], |
| "cc_toolchain_config.bzl", |
| ) |
| wrapped_clang_src_path = str(repository_ctx.path( |
| paths["@bazel_tools//tools/osx/crosstool:wrapped_clang.cc"], |
| )) |
| xcrun_result = repository_ctx.execute([ |
| "env", |
| "-i", |
| "xcrun", |
| "--sdk", |
| "macosx", |
| "clang", |
| "-mmacosx-version-min=10.9", |
| "-std=c++11", |
| "-lc++", |
| "-o", |
| "wrapped_clang", |
| wrapped_clang_src_path, |
| ], 30) |
| if (xcrun_result.return_code == 0): |
| repository_ctx.symlink("wrapped_clang", "wrapped_clang_pp") |
| else: |
| error_msg = ( |
| "return code {code}, stderr: {err}, stdout: {out}" |
| ).format( |
| code = xcrun_result.return_code, |
| err = xcrun_result.stderr, |
| out = xcrun_result.stdout, |
| ) |
| fail("wrapped_clang failed to generate. Please file an issue at " + |
| "https://github.com/bazelbuild/bazel/issues with the following:\n" + |
| error_msg) |
| |
| escaped_include_paths = _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains) |
| write_builtin_include_directory_paths(repository_ctx, cc, escaped_include_paths) |
| 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 + "\n") |
| repository_ctx.template( |
| "BUILD", |
| paths["@bazel_tools//tools/osx/crosstool:BUILD.tpl"], |
| {"%{cxx_builtin_include_directories}": "\n".join(escaped_cxx_include_directories)}, |
| ) |
| else: |
| configure_unix_toolchain(repository_ctx, cpu_value = "darwin", overriden_tools = overriden_tools) |
