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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")
def cc_autoconf_impl(repository_ctx, overriden_tools = dict()):
repository_ctx.symlink(
Label("@bazel_tools//tools/cpp:dummy_toolchain.bzl"), "dummy_toolchain.bzl")
env = repository_ctx.os.environ
cpu_value = get_cpu_value(repository_ctx)
if 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(Label("@bazel_tools//tools/cpp:CROSSTOOL"), "CROSSTOOL")
repository_ctx.symlink(Label("@bazel_tools//tools/cpp:BUILD.static"), "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(
implementation = cc_autoconf_impl,
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_VC",
"BAZEL_VS",
"CC",
"CC_CONFIGURE_DEBUG",
"CC_TOOLCHAIN_NAME",
"CPLUS_INCLUDE_PATH",
"CUDA_COMPUTE_CAPABILITIES",
"CUDA_PATH",
"HOMEBREW_RUBY_PATH",
"NO_WHOLE_ARCHIVE_OPTION",
"USE_DYNAMIC_CRT",
"USE_MSVC_WRAPPER",
"SYSTEMROOT",
"VS90COMNTOOLS",
"VS100COMNTOOLS",
"VS110COMNTOOLS",
"VS120COMNTOOLS",
"VS140COMNTOOLS"])
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")
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