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# 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.
"""Rules for configuring the C++ toolchain (experimental)."""
load("@bazel_tools//tools/cpp:windows_cc_configure.bzl", "configure_windows_toolchain")
load("@bazel_tools//tools/cpp:osx_cc_configure.bzl", "configure_osx_toolchain")
load("@bazel_tools//tools/cpp:unix_cc_configure.bzl", "configure_unix_toolchain")
load(
"@bazel_tools//tools/cpp:lib_cc_configure.bzl",
"get_cpu_value",
"resolve_labels",
)
def cc_autoconf_impl(repository_ctx, overriden_tools = dict()):
paths = resolve_labels(repository_ctx, [
"@bazel_tools//tools/cpp:BUILD.static.freebsd",
"@bazel_tools//tools/cpp:CROSSTOOL",
"@bazel_tools//tools/cpp:dummy_toolchain.bzl",
])
repository_ctx.symlink(
paths["@bazel_tools//tools/cpp:dummy_toolchain.bzl"],
"dummy_toolchain.bzl",
)
env = repository_ctx.os.environ
cpu_value = get_cpu_value(repository_ctx)
if "BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN" in env and env["BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN"] == "1":
repository_ctx.symlink(Label("@bazel_tools//tools/cpp:CROSSTOOL.empty"), "CROSSTOOL")
repository_ctx.symlink(Label("@bazel_tools//tools/cpp:BUILD.empty"), "BUILD")
elif cpu_value == "freebsd":
# This is defaulting to the static crosstool, we should eventually
# autoconfigure this platform too. Theorically, FreeBSD should be
# straightforward to add but we cannot run it in a docker container so
# skipping until we have proper tests for FreeBSD.
repository_ctx.symlink(paths["@bazel_tools//tools/cpp:CROSSTOOL"], "CROSSTOOL")
repository_ctx.symlink(paths["@bazel_tools//tools/cpp:BUILD.static.freebsd"], "BUILD")
elif cpu_value == "x64_windows":
# TODO(ibiryukov): overriden_tools are only supported in configure_unix_toolchain.
# We might want to add that to Windows too(at least for msys toolchain).
configure_windows_toolchain(repository_ctx)
elif (cpu_value == "darwin" and
("BAZEL_USE_CPP_ONLY_TOOLCHAIN" not in env or env["BAZEL_USE_CPP_ONLY_TOOLCHAIN"] != "1")):
configure_osx_toolchain(repository_ctx, overriden_tools)
else:
configure_unix_toolchain(repository_ctx, cpu_value, overriden_tools)
cc_autoconf = repository_rule(
environ = [
"ABI_LIBC_VERSION",
"ABI_VERSION",
"BAZEL_COMPILER",
"BAZEL_HOST_SYSTEM",
"BAZEL_LINKOPTS",
"BAZEL_PYTHON",
"BAZEL_SH",
"BAZEL_TARGET_CPU",
"BAZEL_TARGET_LIBC",
"BAZEL_TARGET_SYSTEM",
"BAZEL_USE_CPP_ONLY_TOOLCHAIN",
"BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN",
"BAZEL_USE_LLVM_NATIVE_COVERAGE",
"BAZEL_VC",
"BAZEL_VS",
"CC",
"CC_CONFIGURE_DEBUG",
"CC_TOOLCHAIN_NAME",
"CPLUS_INCLUDE_PATH",
"GCOV",
"HOMEBREW_RUBY_PATH",
"SYSTEMROOT",
"VS90COMNTOOLS",
"VS100COMNTOOLS",
"VS110COMNTOOLS",
"VS120COMNTOOLS",
"VS140COMNTOOLS",
],
implementation = cc_autoconf_impl,
)
def cc_configure():
"""A C++ configuration rules that generate the crosstool file."""
cc_autoconf(name = "local_config_cc")
native.bind(name = "cc_toolchain", actual = "@local_config_cc//:toolchain")
native.register_toolchains(
# Use register_toolchain's target pattern expansion to register all toolchains in the package.
"@local_config_cc//:all",
)
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