问题描述
在发布模式下链接我的项目时，我收到以下警告:
When linking my project in the release mode I am getting the following warning:
myProject-libs/release/libboost_regex-mt-s-1.50.0.a(cpp_regex_traits.o): duplicate section `.data$_ZZN5boost16cpp_regex_traitsIcE21get_catalog_name_instEvE6s_name[boost::cpp_regex_traits<char>::get_catalog_name_inst()::s_name]' has different size
我怀疑原因可能是 boost 库的编译选项与我在项目中使用的选项不同，但我不知道如何找到差异(boost 在构建过程中没有输出这些选项).
I suspect that the cause could be that the boost library is compiled with different options than I use for my project, but I don't know how to find the difference (boost didn't output these options during the build).
为了在 Ubuntu 12.04 上为 win32 编译 boost 我使用了这个程序:
In order to compile the boost for win32 on Ubuntu 12.04 I used this procedure:
tar jxf boost_1_50_0.tar.bz2
cd boost_1_50_0
./bootstrap.sh
echo "using gcc : 4.6 : i686-w64-mingw32-g++ : <rc>i686-w64-mingw32-windres <archiver>i686-w64-mingw32-ar ;" > user-config.jam
./bjam toolset=gcc target-os=windows --address-model=32 variant=release threading=multi threadapi=win32 link=static runtime-link=static --prefix=/opt/boost_1_50_0-release-static-windows-32 --user-config=user-config.jam -j 10 --without-mpi --without-python -sNO_BZIP2=1 -sNO_ZLIB=1 --layout=tagged install
为了在我的项目中编译文件，我使用类似
In order to compile files in my project I use something like
i686-w64-mingw32-g++ -march=corei7 -mfpmath=sse -m32 -Wall -fmessage-length=0 -I"/opt/boost_1_50_0-release-static-windows-32/include" -std=c++0x -O3 -g0 -DNDEBUG -I"myProject/src/cpp" -c -o myProject/build/release/src/cpp/myproject.o myproject/src/cpp/myproject.cpp
我的测试表明正则表达式运行良好，但我仍然想解决警告.
The tests I have indicate that the regexps run fine but still I would like to resolve the warning.
编辑
我发现可以使用 bjam 的 cxxflags= 参数为 boost 编译器添加其他选项.
I found that additional options to the boost compiler can be added using a cxxflags= argument of bjam.
示例:bjam cxxflags='-fPIC' ....
Example: bjam cxxflags='-fPIC' ....
也许确保向项目传递与我相同的参数可以解决问题(特别是链接问题中建议的与优化相关的参数).
Maybe making sure to pass the same arguments as I do to the project could resolve the problem (particularly the arguments related to optimizations as suggested in the linked question).
推荐答案
你的编译器是用不同的选项编译的 :) 在 Linux 上编译库和在 Windows 上编译程序会导致存在同名 .data 段的情况，但它们的大小不一样.这在理论上可能很有趣，因为数据段是可写的，但实际上，这无关紧要.除非有证据表明这会导致我不知道的问题，否则您可以安全地取消该警告；不过，我不知道你是如何让它消失的.
Your compilers were compiled with different options :) Compiling the library on Linux and the program on Windows result in a situation where there is an identically named .data segment, but they aren't the same size. That could theoretically be interesting, inasmuch as a data segment is writable, but in practice, it shouldn't matter. Unless there is evidence to suggest this causes a problem of which I'm not aware, you can safely suppress that warning; I don't know how you'd make it go away, though.
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