问题描述
还有一个链接问题
OS X 10.9.5 x64
OS X 10.9.5 x64
正在使用CMake工具链构建跨平台项目.使用升压.
The cross-platform project is being built using CMake toolchain. Uses boost.
将所有可执行文件与Boost Log链接时出错(肯定找到了BOOST_PATH,成功通过Boost Test进行了单元测试链接)
Error linking all of executables with Boost Log (BOOST_PATH is definitely found, unit-tests link with Boost Test successfuly)
首先尝试.使用Clang
gcc -v
Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin13.4.0
Thread model: posix
助推器
./bootstrap && ./b2 threading=multi link=static runtime-link=static install
成功完成
...updated 638 targets...
链接说明:
if( ("UNIX") AND ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") )
# using Clang
message("UNIX configuration, Clang")
set(CMAKE_CXX_FLAGS "-std=c++11")
set(CMAKE_EXE_LINKER_FLAGS "-std=c++11 -Wl")
将库链接到可执行文件
add_executable(${TARGET} ${SOURCES})
if( ("UNIX") AND ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") )
# using Clang
message("UNIX configuration, Clang")
target_link_libraries(${TARGET}
libhelpers.a
libopenvpn_manager.a
${Boost_LOG_LIBRARY}
${Boost_LOG_SETUP_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_FILESYSTEM_LIBRARY})
生成makefile:
Generating makefiles:
cmake -DCMAKE_OSX_ARCHITECTURES=x86_64 -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++exit .
链接器输出(某些行已选择):
Linker output (some lines selected):
Undefined symbols for architecture x86_64:
"boost::detail::get_tss_data(void const*)", referenced from:
boost::log::v2s_mt_posix::core::add_thread_attribute(boost::log::v2s_mt_posix::attribute_name const&, boost::log::v2s_mt_posix::attribute const&) in libboost_log.a(core.o)
boost::log::v2s_mt_posix::core::remove_thread_attribute(boost::log::v2s_mt_posix::attribute_set::iter<false>) in libboost_log.a(core.o)
boost::log::v2s_mt_posix::core::get_thread_attributes() const in libboost_log.a(core.o)
...
"boost::detail::set_tss_data(void const*, boost::shared_ptr<boost::detail::tss_cleanup_function>, void*, bool)", referenced from:
boost::thread_specific_ptr<boost::log::v2s_mt_posix::core::implementation::thread_data>::reset(boost::log::v2s_mt_posix::core::implementation::thread_data*) in libboost_log.a(core.o)
...
"boost::detail::thread_data_base::~thread_data_base()", referenced from:
boost::detail::thread_data<boost::_bi::bind_t<unsigned long, boost::_mfi::mf0<unsigned long, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::~thread_data() in openvpn_test_app.cpp.o
…
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
第二次尝试.使用GCC
我如何将其设置为默认值
How I made it default
#!/bin/bash
cd /usr/bin
rm cc gcc c++ g++
ln -s /usr/local/bin/gcc-4.9 cc
ln -s /usr/local/bin/gcc-4.9 gcc
ln -s /usr/local/bin/c++-4.9 c++
ln -s /usr/local/bin/g++-4.9 g++
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/4.9.1/libexec/gcc/x86_64-apple-darwin13.2.0/4.9.1/lto-wrapper
Target: x86_64-apple-darwin13.2.0
Configured with: ../configure --build=x86_64-apple-darwin13.2.0 --prefix=/usr/local/Cellar/gcc/4.9.1 --enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-4.9 --with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr --with-mpc=/usr/local/opt/libmpc --with-cloog=/usr/local/opt/cloog --with-isl=/usr/local/opt/isl --with-system-zlib --enable-version-specific-runtime-libs --enable-libstdcxx-time=yes --enable-stage1-checking --enable-checking=release --enable-lto --disable-werror --with-pkgversion='Homebrew gcc 4.9.1' --with-bugurl=https://github.com/Homebrew/homebrew/issues --enable-plugin --disable-nls --enable-multilib
Thread model: posix
gcc version 4.9.1 (Homebrew gcc 4.9.1)
以与以前相同的方式构建Boost
Build Boost the same way as previous
链接说明
elseif( ("UNIX") AND ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU") )
# using GCC
message("UNIX congiguration, GCC")
set(CMAKE_CXX_FLAGS "-std=c++11 -pthread")
set(CMAKE_EXE_LINKER_FLAGS "-std=c++11 -pthread")
将库链接到可执行文件的方式与使用Clang相同
Linking libraries to executable same way as with Clang
target_link_libraries(${TARGET}
libhelpers.a
libopenvpn_manager.a
${Boost_LOG_LIBRARY}
${Boost_LOG_SETUP_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_FILESYSTEM_LIBRARY})
生成makefile文件
Generating makefiles
cmake -DCMAKE_OSX_ARCHITECTURES=x86_64 -DCMAKE_C_COMPILER=/usr/bin/gcc -DCMAKE_CXX_COMPILER=/usr/bin/g++ .
链接器输出:
Undefined symbols for architecture x86_64:
"boost::detail::get_tss_data(void const*)", referenced from:
boost::log::v2s_mt_posix::core::set_thread_attributes(boost::log::v2s_mt_posix::attribute_set const&) in libboost_log.a(core.o)
boost::log::v2s_mt_posix::core::get_thread_attributes() const in libboost_log.a(core.o)
boost::log::v2s_mt_posix::core::remove_thread_attribute(boost::log::v2s_mt_posix::attribute_set::iter<false>) in libboost_log.a(core.o)
…
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
推荐答案
您缺少的符号来自Boost.Thread,Boost.Log在多线程配置中使用它.您需要将线程"组件添加到find_package行,并将Boost_THREAD_LIBRARY变量添加到target_link_libraries行.请注意,您可能需要确保target_link_libraries行中的库顺序正确,以避免链接由符号依赖关系解析顺序引起的错误(应该最后指定叶子依赖关系).例如:
Your missing symbols are from Boost.Thread, which is used by Boost.Log in multi-threaded configuration. You need to add "thread" component to your find_package line and the Boost_THREAD_LIBRARY variable to the target_link_libraries line. Note that you may need to ensure the correct order of libraries in the target_link_libraries line to avoid linking errors caused by symbol dependency resolution order (leaf dependencies should be specified last). For example:
find_package(Boost COMPONENTS log log_setup thread filesystem system)
target_link_libraries(${TARGET}
${Boost_LOG_SETUP_LIBRARY}
${Boost_LOG_LIBRARY}
${Boost_FILESYSTEM_LIBRARY}
${Boost_THREAD_LIBRARY}
${Boost_SYSTEM_LIBRARY}
)
根据您使用的功能,您可能需要类似地添加与Boost.Regex和Boost.DateTime的链接.
Depending on the features you use you may need to similarly add linking with Boost.Regex and Boost.DateTime.
这篇关于架构x86_64的未定义符号:OS X,Boost Log,CMake的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!