使用boost序列化时链接器错误
我正在使用boost序列化。 我编译了: -L/opt/local/lib -lboost_serialization -stdlib=libc++
,但得到了几个(不可更改的)错误:
Undefined symbols for architecture x86_64: "boost::archive::text_oarchive_impl::save(std::__1::basic_string, std::__1::allocator > const&)", referenced from: void boost::archive::save_access::save_primitive, std::__1::allocator > >(boost::archive::text_oarchive&, std::__1::basic_string, std::__1::allocator > const&) in main.o "boost::archive::basic_text_oprimitive > >::~basic_text_oprimitive()", referenced from: boost::archive::text_oarchive_impl::~text_oarchive_impl() in main.o "boost::archive::text_oarchive_impl::text_oarchive_impl(std::__1::basic_ostream >&, unsigned int)", referenced from: boost::archive::text_oarchive::text_oarchive(std::__1::basic_ostream >&, unsigned int) in main.o ld: symbol(s) not found for architecture x86_64
我序列化一个std::vector<std::string>
:
boost::archive::text_oarchive oa(std::cout);
oa << tasks;
我的升级安装有问题吗?
boost库是包含32位和64位机器码的通用二进制文件(所以这不是我想的问题):
$ file libboost_serialization.dylib libboost_serialization.dylib: Mach-O universal binary with 2 architectures libboost_serialization.dylib (for architecture i386): Mach-O dynamically linked shared library i386 libboost_serialization.dylib (for architecture x86_64): Mach-O 64-bit dynamically linked shared library x86_64
我在Mac OS X 10.7上使用sudo port install boost +universal
来sudo port install boost +universal
。
我可以使用下面的代码重现该问题:
#include "boost/archive/text_oarchive.hpp"
#include "boost/serialization/vector.hpp"
#include <vector>
#include <string>
int main()
{
std::vector<std::string> tasks;
boost::archive::text_oarchive oa(std::cout);
oa << tasks;
}
当使用g++
或clang++
及其相应的默认标志并链接-lboost_serialization
时,这种编译和链接没有问题。 然而,当使用clang++
与libc++
链接失败时,本质上是错误消息引用(我已将Boost安装在/opt/boost
):
clang++ -c -stdlib=libc++ -I/opt/boost -W -Wall -ansi serialize.cpp
clang++ -o serialize.tsk -L/opt/boost/stage/lib -stdlib=libc++ serialize.o -lboost_serialization
基于此,我认为使用-stdlib = libc ++的构建需要基于Boost安装指南使用自己的Boost构建版本并构建一个构建版本:
tar jxvf ~/Downloads/boost_1_48_0.tar.bz2
cd boost_1_48_0/tools/build/v2
# change the build rules to use -stdlib=libc++:
mv tools/clang-darwin.jam tools/clang-darwin.jam.orig
sed -e 's/CONFIG_COMMAND)"/CONFIG_COMMAND)" -stdlib=libc++/' < tools/clang-darwin.jam.orig > tools/clang-darwin.jam
./boostrap.sh
sudo ./b2 install --prefix=/opt/boost-clang
cd ../../..
/opt/boost-clang/bin/b2 --build-dir=/opt/tmp toolset=clang stage
sudo /opt/boost-clang/bin/b2 --build-dir=/opt/tmp toolset=clang install --prefix=/opt/boost-clang
我对clang-darwin.jam
所做的编辑几乎肯定不是那些打算的,但他们似乎在做诡计:我对“bjam”了解不多,而我试图找到一个合适的位置来应用更改。 安装的某些步骤使用sudo
将东西安装到受保护的目录中。 显然,你可以安装到你有写权限的其他目录中。 我只是在我的机器上安装了一些东西,防止我意外地搞乱了它。
但是,通过安装,我可以成功构建该程序:
/opt/llvm/bin/clang++ -stdlib=libc++ -W -Wall -ansi -I/opt/boost-clang -c -o serialize.o serialize.cpp
/opt/llvm/bin/clang++ -stdlib=libc++ -L/opt/boost-clang/lib serialize.o -lboost_serialization -o serialize.tsk
它看起来像你的增强库可能是32位。
这是一个你不会注意到的问题,直到你尝试使用其中一个不是标题的几个boost utils。
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