主要是C和C++编译器的配置和SYSROOT的配置。
set (CMAKE_SYSTEM_NAME "Linux")
set (CMAKE_SYSTEM_PROCESSOR "x86_64")
set (default_toolchain_folder /home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux)
if (EXISTS "${default_toolchain_folder}/bin")
set (toolchain_path "${default_toolchain_folder}/bin")
else ()
message (FATAL_ERROR "No clang toolchain ${default_toolchain_folder} support on this platform")
endif ()
set (CMAKE_C_COMPILER "${toolchain_path}/x86_64-linux-gnu-gcc")
set (CMAKE_CXX_COMPILER "${toolchain_path}/x86_64-linux-gnu-g++")
# Where is the target environment.
set (CMAKE_FIND_ROOT_PATH "${default_toolchain_folder}")
set (CMAKE_SYSROOT "${default_toolchain_folder}")
#set (CMAKE_SYSROOT "${default_toolchain_folder}")
#set (CMAKE_SYSROOT "${default_toolchain_folder}/x86_64-linux-gnu")
set (ONLY_CMAKE_FIND_ROOT_PATH ON)
# Search for programs in the build host directories.
set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH)
# Search for libraries and headers in both the target and host directories.
set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
# for opencv
set (CV_DISABLE_OPTIMIZATION ON)
set (CPU_BASELINE "")
set (CPU_DISPATCH "")
add_compile_options (--sysroot=/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux)
add_link_options (--sysroot=/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux)
set (CPP_STDLIB_FILE
"${default_toolchain_folder}/x86_64-linux-gnu/lib64/libstdc++.so"
"${default_toolchain_folder}/x86_64-linux-gnu/lib64/libstdc++.so.6"
"${default_toolchain_folder}/x86_64-linux-gnu/lib64/libstdc++.so.6.0.21"
)
# Use thin archives to save disk space
if (NOT DISABLE_THIN)
set (CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Tcr <TARGET> <LINK_FLAGS> <OBJECTS>")
set (CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> Tr <TARGET> <LINK_FLAGS> <OBJECTS>")
set (CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> Tcr <TARGET> <LINK_FLAGS> <OBJECTS>")
set (CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> Tr <TARGET> <LINK_FLAGS> <OBJECTS>")
endif()
set (MPI_mpi_LIBRARY "${default_toolchain_folder}/lib/libmpi.so")
set (MPI_C_HEADER_DIR "${default_toolchain_folder}/x86_64-linux-gnu/include/")
set (MPI_CXX_HEADER_DIR "${default_toolchain_folder}/x86_64-linux-gnu/include/")
set (MPI_mpi_cxx_LIBRARY "${default_toolchain_folder}/lib/libmpi_cxx.so")
set (MPI_LIBRARIES ${MPI_mpi_LIBRARY} ${MPI_mpi_cxx_LIBRARY})
set (CMAKE_TOOLCHAIN_FILE_FULL_PATH ${CMAKE_SOURCE_DIR}/infra/cmake/module/toolchain/linux_cross_gcc5_glibc2.17_x86_64.cmake)
#message("CMAKE_TOOLCHAIN_FILE_FULL_PATH is ${CMAKE_TOOLCHAIN_FILE_FULL_PATH}")
option (CROSS_COMPILE "if is cross compile" TRUE)
还有一些是第三方库的cmake宏定义，例如openmpi，zlib：
set (MPI_mpi_LIBRARY "${default_toolchain_folder}/lib/libmpi.so")
set (MPI_C_HEADER_DIR "${default_toolchain_folder}/x86_64-linux-gnu/include/")
set (MPI_CXX_HEADER_DIR "${default_toolchain_folder}/x86_64-linux-gnu/include/")
set (MPI_mpi_cxx_LIBRARY "${default_toolchain_folder}/lib/libmpi_cxx.so")
set (MPI_LIBRARIES ${MPI_mpi_LIBRARY} ${MPI_mpi_cxx_LIBRARY})
tops代码栈之前编译过程中依赖sdk的安装，所以建立了交叉编译工具链到sdk的lib库和dtu头文件路径的软链接，后面改成cmake_build下面的子目录传进来的做法之后，很多库在改变sysroot之后找不到了，所以在交叉编译工具链的根目录下面建立了到/home的软链接，确保改变sysroot之后也能找到相关的库和头文件。
不同编译软件的搜索路径不一样，所以这些编译软件编译出来的库会存在搜索路径不一致的情况，这时为了统一，在某个目录放好源文件之后，另外一个目录需要建好软链接。
同样的差异还体现在include和x86_64-linux-gnu/include。
当前编译器的搜索路径可以用下面的命令查询。
库文件的搜索路径的查询命令“/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc -print-search-dirs”，路径用“:”分隔：
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc -print-search-dirs
install: /home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/
programs: =/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/libexec/gcc/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/libexec/gcc/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/libexec/gcc/x86_64-linux-gnu/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/bin/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/bin/
libraries: =/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/lib/x86_64-linux-gnu/5.5.0/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/lib/../lib64/:/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/lib/
头文件搜索路径的查询命令“/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc -E -v -”：
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc -E -v -
Using built-in specs.
COLLECT_GCC=/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc
Target: x86_64-linux-gnu
Configured with: ../configure --prefix=/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux --target=x86_64-linux-gnu --with-glibc-version=2.17 --enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 5.5.0 (GCC)
COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic' '-march=x86-64'
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/libexec/gcc/x86_64-linux-gnu/5.5.0/cc1 -E -quiet -v - -mtune=generic -march=x86-64
ignoring nonexistent directory "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/sys-include"
#include "..." search starts here:
#include <...> search starts here:
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/include
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/include-fixed
/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/../../../../x86_64-linux-gnu/include
End of search list.
一般需要添加到交叉编译工具链中。
以python找不到为例。
需要在交叉编译工具链中增加python版本，当前增加了python3.5和python3.6，后续还需要增加python3.7和3.8，注意编译的时候需要增加sysroot的CFLAGS。
这类比较大的第三方组件需要用现有的交叉编译工具链进行编译。
以sqlit找不到为例。
查了一下ubuntu1604上的sqlite包，发现里面不含glibc2.17以上的符号，直接下载增加到交叉编译工具链中。
查询：
apt search sqlite下载：
apt download libsqlite0 //库文件
apt download libsqlite0-dev //头文件
解压：
deb包解压需要2步，先解压出data.tar.xz，再解压出数据文件：
ar -xf libsqlite0-dev_2.8.17-12fakesync1_amd64.deb
tar -xf data.tar.xz
ar -xf libsqlite0_2.8.17-12fakesync1_amd64.deb
tar -xf data.tar.xz
解压完之后的目录结构如下，其中lib和include是我们需要的库和头文件，share部分文档不需要。将lib和include拷贝到交叉编译工具链的目录。
tree usr/
usr/
|-- include
| `-- sqlite.h
|-- lib
| |-- libsqlite.a
| |-- libsqlite.la
| |-- libsqlite.so -> libsqlite.so.0.8.6
| |-- libsqlite.so.0 -> libsqlite.so.0.8.6
| |-- libsqlite.so.0.8.6
| `-- pkgconfig
| `-- sqlite.pc
`-- share
`-- doc
|-- libsqlite0
| |-- README.Debian
| |-- changelog.Debian.gz
| `-- copyright
`-- libsqlite0-dev
|-- changelog.Debian.gz -> ../libsqlite0/changelog.Debian.gz
`-- copyright
很多对外发布的库里面是不含symbol的，所以用nm命令查不到任何内容，这时可以使用strings命令来查，下面的命令结果表面libsqlite.so.0.8.6中需要使用GLIBC_2.2.5 / GLIBC_2.3 / GLIBC_2.4 / GLIBC_2.15 这几个版本的接口，当前环境只要GLIBC高于2.14就可以正常运行，我们当前的交叉编译工具链的版本是2.17，这种情况下就不需要额外自己编译这个库了。
strings usr/lib/libsqlite.so.0.8.6 | grep "^GLIBC"
GLIBC_2.3
GLIBC_2.14
GLIBC_2.4
GLIBC_2.2.5
主要是交叉编译工具链的传递，考虑到独立的cmake项目对应的infra的相对路径可能不一致，所以不能传相对路径的交叉编译工具链配置文件给独立的cmake项目，每个交叉编译工具链增加
CMAKE_TOOLCHAIN_FILE_FULL_PATH 变量类定义自己的全路径交叉工具链配置文件名。
set (CMAKE_TOOLCHAIN_FILE_FULL_PATH ${CMAKE_SOURCE_DIR}/xxx/linux_cross_gcc5_glibc2.17_x86_64.cmake)
先在sdk/toolchain/下面配置好，其他bazel项目建立到这个目录的软链接，确保全局只有一套bazel的交叉编译工具链配置。
--crosstool_top=//toolchain/linux_cross_gcc5_glibc2.17_x86_64:cross_suite
对TensorFlow，如果配置了交叉编译工具链，还要配置host工具链，方便部分临时编译的host程序能通过执行来生成新的源代码，host工具链配置是bazel自带的。
--host_crosstool_top=@bazel_tools//tools/cpp:toolchain
bazel跨版本间的兼容性很差，一般网上别人给的toolchain配置，如果版本和当前不一样，一般都不能直接用，建议参考bazel编译过程中bazel自己生成的，一般在bazel编译路径的下面目录中可以找到：
external/bazel_tools/tools/cpp/BUILD
external/bazel_tools/tools/cpp/cc_toolchain_config.bzlbazel的配置项很多，大多数可以不改，但需要裁减掉不是相关host或者target的编译配置。
BUILD文件：
package(default_visibility = ["//visibility:public"])
licenses(["notice"]) # Apache 2.0
load(":cc_toolchain_config.bzl", "cc_toolchain_config")
# The toolchain type used to distinguish cc toolchains.
toolchain_type(name = "toolchain_type")
cc_library(
name = "malloc",
)
filegroup(
name = "grep-includes",
srcs = ["grep-includes.sh"],
)
filegroup(
name = "empty",
srcs = []
)
# This is the entry point for --crosstool_top. Toolchains are found
# by lopping off the name of --crosstool_top and searching for
# "cc-compiler-${CPU}" in this BUILD file, where CPU is the target CPU
# specified in --cpu.
#
# This file group should include
# * all cc_toolchain targets supported
# * all file groups that said cc_toolchain might refer to
# Hardcoded toolchain, legacy behaviour.
cc_toolchain_suite(
name = "crossx86-toolchain",
toolchains = {
"k8": ":cc-compiler-crossx86",
},
)
cc_toolchain(
name = "cc-compiler-crossx86",
all_files = ":empty",
ar_files = ":empty",
as_files = ":empty",
compiler_files = ":empty",
dwp_files = ":empty",
linker_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
toolchain_config = ":local_linux",
toolchain_identifier = "local_linux",
)
cc_toolchain_config(
name = "local_linux"
)
toolchain(
name = "cc-toolchain-local",
exec_compatible_with = [
],
target_compatible_with = [
],
toolchain = ":cc-compiler-local",
toolchain_type = ":toolchain_type",
)
filegroup(
name = "srcs",
srcs = glob(["**"]) + [
"//tools/cpp/runfiles:srcs",
],
)
filegroup(
name = "embedded_tools",
srcs = glob(["**"]) + [
"//tools/cpp/runfiles:embedded_tools",
],
)
filegroup(
name = "interface_library_builder",
srcs = ["build_interface_so"],
)
filegroup(
name = "osx_wrapper",
srcs = ["osx_cc_wrapper.sh"],
)
filegroup(
name = "link_dynamic_library",
srcs = ["link_dynamic_library.sh"],
)
filegroup(
name = "lib_cc_configure",
srcs = ["lib_cc_configure.bzl"],
)
cc_toolchain_config.bzl：
# Copyright 2019 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.
"""A Starlark cc_toolchain configuration rule"""
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
"action_config",
"artifact_name_pattern",
"env_entry",
"env_set",
"feature",
"feature_set",
"flag_group",
"flag_set",
"make_variable",
"tool",
"tool_path",
"variable_with_value",
"with_feature_set",
)
load(
"@bazel_tools//tools/build_defs/cc:action_names.bzl",
_ASSEMBLE_ACTION_NAME = "ASSEMBLE_ACTION_NAME",
_CLIF_MATCH_ACTION_NAME = "CLIF_MATCH_ACTION_NAME",
_CPP_COMPILE_ACTION_NAME = "CPP_COMPILE_ACTION_NAME",
_CPP_HEADER_PARSING_ACTION_NAME = "CPP_HEADER_PARSING_ACTION_NAME",
_CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME = "CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME",
_CPP_LINK_EXECUTABLE_ACTION_NAME = "CPP_LINK_EXECUTABLE_ACTION_NAME",
_CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME = "CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME",
_CPP_LINK_STATIC_LIBRARY_ACTION_NAME = "CPP_LINK_STATIC_LIBRARY_ACTION_NAME",
_CPP_MODULE_CODEGEN_ACTION_NAME = "CPP_MODULE_CODEGEN_ACTION_NAME",
_CPP_MODULE_COMPILE_ACTION_NAME = "CPP_MODULE_COMPILE_ACTION_NAME",
_C_COMPILE_ACTION_NAME = "C_COMPILE_ACTION_NAME",
_LINKSTAMP_COMPILE_ACTION_NAME = "LINKSTAMP_COMPILE_ACTION_NAME",
_LTO_BACKEND_ACTION_NAME = "LTO_BACKEND_ACTION_NAME",
_LTO_INDEXING_ACTION_NAME = "LTO_INDEXING_ACTION_NAME",
_PREPROCESS_ASSEMBLE_ACTION_NAME = "PREPROCESS_ASSEMBLE_ACTION_NAME",
_STRIP_ACTION_NAME = "STRIP_ACTION_NAME",
)
all_compile_actions = [
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
]
all_cpp_compile_actions = [
_CPP_COMPILE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
]
preprocessor_compile_actions = [
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
]
codegen_compile_actions = [
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
]
all_link_actions = [
_CPP_LINK_EXECUTABLE_ACTION_NAME,
_CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME,
_CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME,
]
def _impl(ctx):
toolchain_identifier = "local_linux"
host_system_name = "local"
target_system_name = "local"
target_cpu = "local"
target_libc = "GLIBC_2.17"
abi_libc_version = "2.17"
compiler = "compiler"
abi_version = "gcc-5.5-cxx11"
cc_target_os = None
builtin_sysroot = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux"
objcopy_embed_data_action = action_config(
action_name = "objcopy_embed_data",
enabled = True,
tools = [tool(path = "/usr/bin/objcopy")],
)
action_configs = [objcopy_embed_data_action]
random_seed_feature = feature(name = "random_seed", enabled = True)
default_link_flags_feature = feature(
name = "default_link_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_link_actions,
flag_groups = [
flag_group(
flags = [
"-lstdc++",
"-Wl,-z,relro,-z,now",
"-no-canonical-prefixes",
"-pass-exit-codes",
],
),
],
),
flag_set(
actions = all_link_actions,
flag_groups = [flag_group(flags = ["-Wl,--gc-sections"])],
with_features = [with_feature_set(features = ["opt"])],
),
],
)
unfiltered_compile_flags_feature = feature(
name = "unfiltered_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = [
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
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\"",
],
),
],
),
],
)
supports_pic_feature = feature(name = "supports_pic", enabled = True)
default_compile_flags_feature = feature(
name = "default_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = [
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
flag_groups = [
flag_group(
flags = [
"-U_FORTIFY_SOURCE",
"-D_FORTIFY_SOURCE=1",
"-fstack-protector",
"-Wall",
"-Wunused-but-set-parameter",
"-Wno-free-nonheap-object",
"-fno-omit-frame-pointer",
],
),
],
),
flag_set(
actions = [
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
flag_groups = [flag_group(flags = ["-g"])],
with_features = [with_feature_set(features = ["dbg"])],
),
flag_set(
actions = [
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
flag_groups = [
flag_group(
flags = [
"-g0",
"-O2",
"-DNDEBUG",
"-ffunction-sections",
"-fdata-sections",
],
),
],
with_features = [with_feature_set(features = ["opt"])],
),
flag_set(
actions = [
_LINKSTAMP_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
flag_groups = [flag_group(flags = ["-std=c++0x"])],
),
],
)
opt_feature = feature(name = "opt")
supports_dynamic_linker_feature = feature(name = "supports_dynamic_linker", enabled = True)
objcopy_embed_flags_feature = feature(
name = "objcopy_embed_flags",
enabled = True,
flag_sets = [
flag_set(
actions = ["objcopy_embed_data"],
flag_groups = [flag_group(flags = ["-I", "binary"])],
),
],
)
dbg_feature = feature(name = "dbg")
user_compile_flags_feature = feature(
name = "user_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = [
_ASSEMBLE_ACTION_NAME,
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
],
flag_groups = [
flag_group(
flags = ["%{user_compile_flags}"],
iterate_over = "user_compile_flags",
expand_if_available = "user_compile_flags",
),
],
),
],
)
sysroot_feature = feature(
name = "sysroot",
enabled = True,
flag_sets = [
flag_set(
actions = [
_PREPROCESS_ASSEMBLE_ACTION_NAME,
_LINKSTAMP_COMPILE_ACTION_NAME,
_C_COMPILE_ACTION_NAME,
_CPP_COMPILE_ACTION_NAME,
_CPP_HEADER_PARSING_ACTION_NAME,
_CPP_MODULE_COMPILE_ACTION_NAME,
_CPP_MODULE_CODEGEN_ACTION_NAME,
_LTO_BACKEND_ACTION_NAME,
_CLIF_MATCH_ACTION_NAME,
_CPP_LINK_EXECUTABLE_ACTION_NAME,
_CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME,
_CPP_LINK_NODEPS_DYNAMIC_LIBRARY_ACTION_NAME,
],
flag_groups = [
flag_group(
flags = ["--sysroot=/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux"],
),
],
),
],
)
fastbuild_feature = feature(name = "fastbuild")
features = [
default_compile_flags_feature,
default_link_flags_feature,
supports_dynamic_linker_feature,
supports_pic_feature,
objcopy_embed_flags_feature,
opt_feature,
dbg_feature,
user_compile_flags_feature,
sysroot_feature,
unfiltered_compile_flags_feature,
]
cxx_builtin_include_directories = [ # NEW
"/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/include",
"/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/lib/gcc/x86_64-linux-gnu/5.5.0/include-fixed",
"/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/x86_64-linux-gnu/include"
]
artifact_name_patterns = []
make_variables = []
tool_paths = [ # NEW
tool_path(
name = "gcc",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc",
),
tool_path(
name = "g++",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-g++",
),
tool_path(
name = "ld",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-ld",
),
tool_path(
name = "ar",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/ar",
),
tool_path(
name = "cpp",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-cpp",
),
tool_path(
name = "gcov",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcov",
),
tool_path(
name = "nm",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-gcc-nm",
),
tool_path(
name = "objdump",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-objdump",
),
tool_path(
name = "strip",
path = "/home/.devtools/efb/efb_x86_64_gcc-5.5.0_glibc-2.17_linux/bin/x86_64-linux-gnu-strip",
),
]
out = ctx.actions.declare_file(ctx.label.name)
ctx.actions.write(out, "Fake executable")
return [
cc_common.create_cc_toolchain_config_info(
ctx = ctx,
features = features,
action_configs = action_configs,
artifact_name_patterns = artifact_name_patterns,
cxx_builtin_include_directories = cxx_builtin_include_directories,
toolchain_identifier = toolchain_identifier,
host_system_name = host_system_name,
target_system_name = target_system_name,
target_cpu = target_cpu,
target_libc = target_libc,
compiler = compiler,
abi_version = abi_version,
abi_libc_version = abi_libc_version,
tool_paths = tool_paths,
make_variables = make_variables,
builtin_sysroot = builtin_sysroot,
cc_target_os = cc_target_os,
),
DefaultInfo(
executable = out,
),
]
cc_toolchain_config = rule(
implementation = _impl,
attrs = {},
provides = [CcToolchainConfigInfo],
executable = True,
)
部分项目的编译框架是python构建的，例如horovod，相关适配修改只能通过直接修改horovod的setup.py文件。
类似cmake的交叉编译工具链的配置，主要涉及CC/CXX/SYSROOT，要不然python项目中涉及的一些c或者c++代码的编译无法使用交叉编译工具链来编译。
如果python项目中有子项目是cmake或者bazel编译的话，需要参照其他cmake和bazel项目的编译配置方法进行配置。
特别的，TensorFlow目标编译过程中需要host编译器编译的临时文件，在修改CC和CXX为交叉工具链编译的可执行文件之后，有可能在host上是无法运行。
但python项目又必须要修改CC和CXX，这时必须通过临时修改环境变量的做法，确保python项目里面使用的是交叉的CC和CXX，但其他项目还是用默认的CC和CXX。
使用交叉编译工具链编译出来的bazel tf_cc_test目标，部分target会从动态链接变成静态链接，如果依赖规则里面没有alwayslink编译选项的话，可能导致部分.o静态链接的时候符号缺失，这种情况下需要增加alwayslink=1的选项。
我不知道为什么，但是当我设置这个设置时它无法编译设置:static_cache_control，[:public，:max_age=>300]这是我得到的syntaxerror,unexpectedtASSOC,expecting']'(SyntaxError)set:static_cache_control,[:public,:max_age=>300]^我只想将“过期”header设置为css、javaascript和图像文件。谢谢。 最佳答案 我猜您使用的是Ruby1.8.7。Sinatra文档中显示的语法似乎是在Ruby1.
最近因为项目需要，需要将Android手机系统自带的某个系统软件反编译并更改里面某个资源，并重新打包，签名生成新的自定义的apk，下面我来介绍一下我的实现过程。APK修改，分为以下几步：反编译解包,修改,重打包,修改签名等步骤。安卓apk修改准备工作1.系统配置好JavaJDK环境变量2.需要root权限的手机（针对系统自带apk,其他软件免root）3.Auto-Sign签名工具4.apktool工具安卓apk修改开始反编译本文拿Android系统里面的Settings.apk做demo,具体如何将apk获取出来在此就不过多介绍了，直接进入主题：按键win+R输入cmd，打开命令窗口，并将路
在我做的一些网络开发中，我有多个操作开始，比如对外部API的GET请求，我希望它们同时开始，因为一个不依赖另一个的结果。我希望事情能够在后台运行。我找到了concurrent-rubylibrary这似乎运作良好。通过将其混合到您创建的类中，该类的方法具有在后台线程上运行的异步版本。这导致我编写如下代码，其中FirstAsyncWorker和SecondAsyncWorker是我编写的类，我在其中混合了Concurrent::Async模块，并编写了一个名为“work”的方法来发送HTTP请求:defindexop1_result=FirstAsyncWorker.new.async.
一边学习thisRailscast我从Rack中看到了以下源代码:defself.middleware@middleware||=beginm=Hash.new{|h,k|h[k]=[]}m["deployment"].concat[[Rack::ContentLength],[Rack::Chunked],logging_middleware]m["development"].concatm["deployment"]+[[Rack::ShowExceptions],[Rack::Lint]]mendend我的问题是关于第三行。什么是传递block{|h,k|h[k]=[]}到Has
是否有适用于Ruby语言的.NETFramework编译器？我听说过DLR(动态语言运行时)，这是否将使Ruby能够用于.NET开发？ 最佳答案 IronRuby是Microsoft支持的项目，建立在动态语言运行时之上。 关于.net-是否有Ruby.NET编译器？，我们在StackOverflow上找到一个类似的问题： https://stackoverflow.com/questions/199638/
在我的mac上安装几个东西时遇到这个问题，我认为这个问题来自将我的豹子升级到雪豹。我认为这个问题也与macports有关。/usr/local/lib/libz.1.dylib,filewasbuiltfori386whichisnotthearchitecturebeinglinked(x86_64)有什么想法吗？更新更具体地说，这发生在安装nokogirigem时日志看起来像:xslt_stylesheet.c:127:warning:passingargument1of‘Nokogiri_wrap_xml_document’withdifferentwidthduetoproto
关闭。这个问题是off-topic.它目前不接受答案。想改进这个问题吗？Updatethequestion所以它是on-topic用于堆栈溢出。关闭10年前。ImprovethisquestionLinux专家正在转向Mac(10.8)。因为我懒...我使用MacPorts安装MacVim。它似乎安装没有错误。我只需要mvim中的python、ruby和perl支持。$/opt/local/bin/mvim--version|egrep'patches|python|ruby|perl'Includedpatches:1-244,246-646+multi_lang-mzscheme+
我们在服务器端遇到libxml-rubygem的问题可能是因为它使用x86_64架构:$uname-aLinuxip-10-228-171-642.6.21.7-2.fc8xen-ec2-v1.0#1SMPTueSep110:25:30EDT2009x86_64GNU/Linuxrequire'libxml'LoadError:/usr/local/ruby-enterprise/lib/ruby/gems/1.8/gems/libxml-ruby-1.1.4/lib/libxml_ruby.so:invalidELFheader-/usr/local/ruby-enterprise/
我已经开始学习Ruby，我已经阅读了一些教程，甚至还买了一本书(“ProgrammingRuby1.9-ThePragmaticProgrammers'Guide”)，我遇到了一些以前从未见过的新东西使用我知道的任何其他语言(我是一名PHP网络开发人员)。block和过程。我想我明白它们是什么，但我不明白的是为什么它们如此伟大，以及我应该在何时何地使用它们。我到处都看到他们说block和过程是Ruby中的一个很棒的特性，但我不理解它们。这里有人能给像我这样的Ruby新手一些解释吗？ 最佳答案 block有很多好处。电梯演讲:bloc
当我刚刚运行middleman时服务，all.css编译得很好，只包含对+box-shadow(none)的调用:/*line1,/home/yang/asdf/source/stylesheets/content.css.sass*/div{-webkit-box-shadow:none;-moz-box-shadow:none;box-shadow:none;}但是当我构建网站时，我得到了这个Sass/Compass错误:$middlemanbuildSlim::EmbeddedEngineisdeprecated,itiscalledSlim::EmbeddedinSlim2.0