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cc_toolchain_config.bzl.tpl
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# Copyright 2019 Google LLC
#
# 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
#
# https://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.
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
"action_config",
"feature",
"flag_group",
"flag_set",
"tool",
"tool_path",
"with_feature_set",
)
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
ALL_COMPILE_ACTIONS = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.linkstamp_compile,
ACTION_NAMES.assemble,
ACTION_NAMES.preprocess_assemble,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
ACTION_NAMES.cpp_module_codegen,
ACTION_NAMES.clif_match,
ACTION_NAMES.lto_backend,
]
ALL_LINK_ACTIONS = [
ACTION_NAMES.cpp_link_executable,
ACTION_NAMES.cpp_link_dynamic_library,
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
]
def make_tool_paths(prefix):
return [
tool_path(name = "ar", path = prefix + "ar"),
tool_path(name = "as", path = prefix + "as"),
tool_path(name = "compat-ld", path = prefix + "ld"),
tool_path(name = "cpp", path = prefix + "cpp"),
tool_path(name = "dwp", path = prefix + "dwp"),
tool_path(name = "gcc", path = prefix + "gcc"),
tool_path(name = "gcov", path = prefix + "gcov"),
tool_path(name = "ld", path = prefix + "ld"),
tool_path(name = "nm", path = prefix + "nm"),
tool_path(name = "objcopy", path = prefix + "objcopy"),
tool_path(name = "objdump", path = prefix + "objdump"),
tool_path(name = "strip", path = prefix + "strip"),
]
C_VERSION = "%{c_version}%"
CPP_VERSION = "%{cpp_version}%"
# gcc -dumpversion | cut -f1 -d.
GCC_VERSION = %{gcc_version}%
# gcc -E -xc++ - -v
CXX_BUILTIN_INCLUDE_DIRECTORIES = {
"k8": [
"/usr/include/c++/%d" % GCC_VERSION,
"/usr/include/x86_64-linux-gnu/c++/%d" % GCC_VERSION,
"/usr/include/c++/%d/backward" % GCC_VERSION,
"/usr/lib/gcc/x86_64-linux-gnu/%d/include" % GCC_VERSION,
"/usr/local/include",
"/usr/lib/gcc/x86_64-linux-gnu/%d/include-fixed" % GCC_VERSION,
"/usr/include/x86_64-linux-gnu",
"/usr/include",
],
"armv7a": [
"/usr/arm-linux-gnueabihf/include/c++/%d" % GCC_VERSION,
"/usr/arm-linux-gnueabihf/include/c++/%d/arm-linux-gnueabihf" % GCC_VERSION,
"/usr/arm-linux-gnueabihf/include/c++/%d/backward" % GCC_VERSION,
"/usr/lib/gcc-cross/arm-linux-gnueabihf/%d/include" % GCC_VERSION,
"/usr/lib/gcc-cross/arm-linux-gnueabihf/%d/include-fixed" % GCC_VERSION,
"/usr/arm-linux-gnueabihf/include",
"/usr/include/arm-linux-gnueabihf",
"/usr/include"
],
"armv6": [
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/arm-linux-gnueabihf/include/c++/4.9.3",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/arm-linux-gnueabihf/include/c++/4.9.3/arm-linux-gnueabihf",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/arm-linux-gnueabihf/include/c++/4.9.3/backward",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/4.9.3/include",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/4.9.3/include-fixed",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/arm-linux-gnueabihf/include",
"%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/arm-linux-gnueabihf/sysroot/usr/include",
],
"aarch64": [
"/usr/aarch64-linux-gnu/include/c++/%d" % GCC_VERSION,
"/usr/aarch64-linux-gnu/include/c++/%d/aarch64-linux-gnu" % GCC_VERSION,
"/usr/aarch64-linux-gnu/include/c++/%d/backward" % GCC_VERSION,
"/usr/lib/gcc-cross/aarch64-linux-gnu/%d/include" % GCC_VERSION,
"/usr/lib/gcc-cross/aarch64-linux-gnu/%d/include-fixed" % GCC_VERSION,
"/usr/aarch64-linux-gnu/include",
"/usr/include/aarch64-linux-gnu",
"/usr/include",
],
"riscv64": [
"/usr/riscv64-linux-gnu/include/c++/%d" % GCC_VERSION,
"/usr/riscv64-linux-gnu/include/c++/%d/riscv64-linux-gnu" % GCC_VERSION,
"/usr/riscv64-linux-gnu/include/c++/%d/backward" % GCC_VERSION,
"/usr/lib/gcc-cross/riscv64-linux-gnu/%d/include" % GCC_VERSION,
"/usr/lib/gcc-cross/riscv64-linux-gnu/%d/include-fixed" % GCC_VERSION,
"/usr/riscv64-linux-gnu/include",
"/usr/include/riscv64-linux-gnu",
"/usr/include",
]
}
ADDITIONAL_SYSTEM_INCLUDE_DIRECTORIES = [%{additional_system_include_directories}%]
TOOL_PATH_PREFIX = {
"k8": "/usr/bin/x86_64-linux-gnu-",
"armv7a": "/usr/bin/arm-linux-gnueabihf-",
"armv6": "%{bcm2708_toolchain_root}%/arm-linux-gnueabihf/bin/arm-linux-gnueabihf-",
"aarch64": "/usr/bin/aarch64-linux-gnu-",
"riscv64": "/usr/bin/riscv64-linux-gnu-",
}
HOST_SYSTEM_NAME = "x86_64-linux-gnu"
TARGET_SYSTEM_NAME = {
"k8": "x86_64-linux-gnu",
"armv7a": "arm-linux-gnueabihf",
"armv6": "arm-linux-gnueabihf",
"aarch64": "aarch64-linux-gnu",
"riscv64": "riscv64-linux-gnu",
}
COMPILE_FLAGS = {
"k8": ["-msse4.2"],
"armv7a": ["-march=armv7-a", "-mfpu=neon-vfpv4"],
"armv6": [],
"aarch64": ["-march=armv8-a"],
"riscv64": [],
}
COMMON_OPT_COMPILE_FLAGS = [
"-g0",
"-O3",
"-DNDEBUG",
"-D_FORTIFY_SOURCE=2",
"-ffunction-sections",
"-fdata-sections",
]
NON_K8_OPT_COMPILE_FLAGS = [
"-funsafe-math-optimizations",
"-ftree-vectorize",
]
OPT_COMPILE_FLAGS = {
"k8": COMMON_OPT_COMPILE_FLAGS,
"armv7a": COMMON_OPT_COMPILE_FLAGS + NON_K8_OPT_COMPILE_FLAGS,
"armv6": COMMON_OPT_COMPILE_FLAGS + NON_K8_OPT_COMPILE_FLAGS,
"aarch64": COMMON_OPT_COMPILE_FLAGS + NON_K8_OPT_COMPILE_FLAGS,
"riscv64": COMMON_OPT_COMPILE_FLAGS + NON_K8_OPT_COMPILE_FLAGS,
}
COMMON_LINKER_FLAGS = [
"-lstdc++",
"-lm",
"-Wl,-no-as-needed",
"-Wl,-z,relro,-z,now",
"-Wall",
"-pass-exit-codes",
]
GOLD_LINKER_FLAG = "-fuse-ld=gold"
LINKER_FLAGS = {
"k8": [GOLD_LINKER_FLAG],
"armv7a": [GOLD_LINKER_FLAG],
"armv6": [GOLD_LINKER_FLAG],
"aarch64": [GOLD_LINKER_FLAG],
"riscv64": [],
}
def _impl(ctx):
unfiltered_compile_flags_feature = feature(
name = "unfiltered_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ALL_COMPILE_ACTIONS,
flag_groups = [
flag_group(
flags = [
"-no-canonical-prefixes",
"-fno-canonical-system-headers",
"-Wno-builtin-macro-redefined",
"-D__DATE__=\"redacted\"",
"-D__TIMESTAMP__=\"redacted\"",
"-D__TIME__=\"redacted\"",
],
),
],
),
],
)
default_compile_flags_feature = feature(
name = "default_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ALL_COMPILE_ACTIONS,
flag_groups = [
flag_group(
flags = [
"-fPIC",
"-U_FORTIFY_SOURCE",
"-fstack-protector",
"-Wall",
"-Wunused-but-set-parameter",
"-Wno-free-nonheap-object",
"-fno-omit-frame-pointer",
# "-fmessage-length=0",
# "-fno-omit-frame-pointer",
# "-fno-strict-aliasing",
# "-fdebug-types-section",
],
),
],
),
flag_set(
actions = ALL_COMPILE_ACTIONS,
flag_groups = [
flag_group(flags = COMPILE_FLAGS[ctx.attr.cpu] + ["-g"])
],
with_features = [with_feature_set(features = ["dbg"])],
),
flag_set(
actions = ALL_COMPILE_ACTIONS,
flag_groups = [
flag_group(
flags = COMPILE_FLAGS[ctx.attr.cpu] + OPT_COMPILE_FLAGS[ctx.attr.cpu],
),
],
with_features = [with_feature_set(features = ["opt"])],
),
flag_set(
actions = [
ACTION_NAMES.linkstamp_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
ACTION_NAMES.cpp_module_codegen,
ACTION_NAMES.lto_backend,
ACTION_NAMES.clif_match,
],
flag_groups = [
flag_group(
flags = [
"-std=" + CPP_VERSION,
] + [f for d in ADDITIONAL_SYSTEM_INCLUDE_DIRECTORIES for f in ('-isystem', d)],
),
],
),
flag_set(
actions = [
ACTION_NAMES.c_compile,
],
flag_groups = [
flag_group(
flags = [
"-std=" + C_VERSION,
] + [f for d in ADDITIONAL_SYSTEM_INCLUDE_DIRECTORIES for f in ('-isystem', d)],
),
],
),
],
)
supports_dynamic_linker_feature = feature(
name = "supports_dynamic_linker",
enabled = True,
)
user_compile_flags_feature = feature(
name = "user_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ALL_COMPILE_ACTIONS,
flag_groups = [
flag_group(
flags = ["%{user_compile_flags}"],
iterate_over = "user_compile_flags",
expand_if_available = "user_compile_flags",
),
],
),
],
)
default_link_flags_feature = feature(
name = "default_link_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ALL_LINK_ACTIONS,
flag_groups = [
flag_group(
flags = COMMON_LINKER_FLAGS + LINKER_FLAGS[ctx.attr.cpu]
),
],
),
flag_set(
actions = ALL_LINK_ACTIONS,
flag_groups = [
flag_group(flags = ["-Wl,--gc-sections"])
],
with_features = [with_feature_set(features = ["opt"])],
),
flag_set(
actions = ALL_LINK_ACTIONS,
flag_groups = [
flag_group(
flags = [
"-Wl,--whole-archive",
"-Wl,-lpthread",
"-Wl,--no-whole-archive",
],
),
],
with_features = [
with_feature_set(features = [
"fully_static_link",
"static_linking_mode",
]),
],
),
],
)
return cc_common.create_cc_toolchain_config_info(
ctx = ctx,
features = [
feature(name = "static_linking_mode"),
feature(name = "fully_static_link"),
feature(name = "dynamic_linking_mode"),
feature(name = "dbg"),
feature(name = "opt"),
default_compile_flags_feature,
default_link_flags_feature,
supports_dynamic_linker_feature,
user_compile_flags_feature,
unfiltered_compile_flags_feature,
],
action_configs = [],
artifact_name_patterns = [],
cxx_builtin_include_directories = (
ADDITIONAL_SYSTEM_INCLUDE_DIRECTORIES +
CXX_BUILTIN_INCLUDE_DIRECTORIES[ctx.attr.cpu]
),
toolchain_identifier = ctx.attr.cpu + '-toolchain',
host_system_name = HOST_SYSTEM_NAME,
target_system_name = TARGET_SYSTEM_NAME[ctx.attr.cpu],
target_cpu = ctx.attr.cpu,
target_libc = "local",
compiler = "gcc",
abi_version = "local",
abi_libc_version = "local",
tool_paths = make_tool_paths(TOOL_PATH_PREFIX[ctx.attr.cpu]),
make_variables = [],
)
cc_toolchain_config = rule(
implementation = _impl,
attrs = {
"cpu": attr.string(mandatory = True, values = ["armv7a", "armv6", "aarch64", "k8", "riscv64"]),
},
provides = [CcToolchainConfigInfo],
)