# 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( ":lib_cc_configure.bzl", "escape_string", "resolve_labels", "write_builtin_include_directory_paths", ) load( ":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 compile_cc_file(repository_ctx, src_name, out_name): xcrun_result = repository_ctx.execute([ "env", "-i", "xcrun", "--sdk", "macosx", "clang", "-mmacosx-version-min=10.9", "-std=c++11", "-lc++", "-o", out_name, src_name, ], 30) 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/bazel/issues with the following:\n" + error_msg) def configure_osx_toolchain(repository_ctx, overriden_tools): """Configure C++ toolchain on macOS. Args: repository_ctx: The repository context. overriden_tools: dictionary of overriden tools. """ paths = resolve_labels(repository_ctx, [ "@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl", "@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl", "@rules_cc//cc/private/toolchain:libtool_check_unique.cc", "@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 @rules_cc//cc/private/toolchain: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["@rules_cc//cc/private/toolchain:osx_cc_wrapper.sh.tpl"], { "%{cc}": escape_string(cc_path), "%{env}": escape_string(get_env(repository_ctx)), }, ) repository_ctx.symlink( paths["@rules_cc//cc/private/toolchain:armeabi_cc_toolchain_config.bzl"], "armeabi_cc_toolchain_config.bzl", ) 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", ) libtool_check_unique_src_path = str(repository_ctx.path( paths["@rules_cc//cc/private/toolchain:libtool_check_unique.cc"], )) compile_cc_file(repository_ctx, libtool_check_unique_src_path, "libtool_check_unique") wrapped_clang_src_path = str(repository_ctx.path( paths["@bazel_tools//tools/osx/crosstool:wrapped_clang.cc"], )) 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, 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), "%{tool_paths_overrides}": ",\n ".join( ['"%s": "%s"' % (k, v) for k, v in tool_paths.items()], ), }, ) else: configure_unix_toolchain(repository_ctx, cpu_value = "darwin", overriden_tools = overriden_tools)