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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",
"resolve_labels",
)
load(
"@bazel_tools//tools/cpp:unix_cc_configure.bzl",
"configure_unix_toolchain",
"find_cc",
"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))
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:CROSSTOOL.tpl",
"@bazel_tools//tools/osx/crosstool:osx_archs.bzl",
"@bazel_tools//tools/osx/crosstool:wrapped_ar.tpl",
"@bazel_tools//tools/osx/crosstool:wrapped_clang.cc",
"@bazel_tools//tools/osx/crosstool:wrapped_clang.tpl",
"@bazel_tools//tools/osx/crosstool:wrapped_clang_pp.tpl",
"@bazel_tools//tools/osx:xcode_locator.m",
])
xcode_toolchains = []
(xcode_toolchains, xcodeloc_err) = run_xcode_locator(
repository_ctx,
paths["@bazel_tools//tools/osx:xcode_locator.m"],
)
if xcode_toolchains:
cc = find_cc(repository_ctx, overriden_tools = {})
repository_ctx.template(
"cc_wrapper.sh",
paths["@bazel_tools//tools/cpp:osx_cc_wrapper.sh.tpl"],
{
"%{cc}": escape_string(str(cc)),
"%{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:wrapped_ar.tpl"],
"wrapped_ar",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/osx/crosstool:BUILD.tpl"],
"BUILD",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/osx/crosstool:osx_archs.bzl"],
"osx_archs.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",
"clang",
"-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:
# If for some reason wrapped_clang couldn't be built, fall back to
# using the bash scripts that don't support dSYM generation. This is to
# avoid completely breaking a build. This should be removed after a whole
# release cycle to keep from increasing code maintenance, if we haven't
# received any issues as requested below.
error_msg = (
"return code {code}, stderr: {err}, stdout: {out}"
).format(
code = xcrun_result.return_code,
err = xcrun_result.stderr,
out = xcrun_result.stdout,
)
print("wrapped_clang failed to generate. This shouldn't cause " +
"problems, but please file an issue at " +
"https://github.com/bazelbuild/bazel/issues with the following:\n" +
error_msg)
repository_ctx.symlink(
paths["@bazel_tools//tools/osx/crosstool:wrapped_clang.tpl"],
"wrapped_clang",
)
repository_ctx.symlink(
paths["@bazel_tools//tools/osx/crosstool:wrapped_clang_pp.tpl"],
"wrapped_clang_pp",
)
escaped_include_paths = _get_escaped_xcode_cxx_inc_directories(repository_ctx, cc, xcode_toolchains)
escaped_cxx_include_directories = []
for path in escaped_include_paths:
escaped_cxx_include_directories.append(("cxx_builtin_include_directory: \"%s\"" % path))
if xcodeloc_err:
escaped_cxx_include_directories.append("# Error: " + xcodeloc_err + "\n")
repository_ctx.template(
"CROSSTOOL",
paths["@bazel_tools//tools/osx/crosstool:CROSSTOOL.tpl"],
{"%{cxx_builtin_include_directory}": "\n".join(escaped_cxx_include_directories)},
)
else:
configure_unix_toolchain(repository_ctx, cpu_value = "darwin", overriden_tools = overriden_tools)
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