1

我无法在 OSX Lion 上链接一个非常简单的 c++ 程序。错误信息是

Undefined symbols for architecture x86_64: "std::basic_string<char, std::char_traits<char>

这是编译器的完整详细输出：

Nicholass-MacBook-Pro:hello_vbo-build jubei$ make VERBOSE=1
"/Applications/CMake 2.8-9.app/Contents/bin/cmake" -H/Users/jubei/coding/hello_vbo -               B/Users/jubei/coding/hello_vbo-build --check-build-system CMakeFiles/Makefile.cmake 0
"/Applications/CMake 2.8-9.app/Contents/bin/cmake" -E cmake_progress_start /Users/jubei/coding/hello_vbo-build/CMakeFiles /Users/jubei/coding/hello_vbo-build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make -f CMakeFiles/hellovbo.dir/build.make CMakeFiles/hellovbo.dir/depend
cd /Users/jubei/coding/hello_vbo-build && "/Applications/CMake 2.8-9.app/Contents/bin/cmake" -E cmake_depends "Unix Makefiles" /Users/jubei/coding/hello_vbo /Users/jubei/coding/hello_vbo /Users/jubei/coding/hello_vbo-build /Users/jubei/coding/hello_vbo-build /Users/jubei/coding/hello_vbo-build/CMakeFiles/hellovbo.dir/DependInfo.cmake --color=
make -f CMakeFiles/hellovbo.dir/build.make CMakeFiles/hellovbo.dir/build
"/Applications/CMake 2.8-9.app/Contents/bin/cmake" -E cmake_progress_report/Users/jubei/coding/hello_vbo-build/CMakeFiles 1
[100%] Building CXX object CMakeFiles/hellovbo.dir/main.cpp.o
/opt/local/bin/g++-mp-4.8    --std=c++11 -I/usr/local/include -I/Users/jubei/coding/hello_vbo/include    -o CMakeFiles/hellovbo.dir/main.cpp.o -c /Users/jubei/coding/hello_vbo/main.cpp
Linking CXX executable hellovbo
"/Applications/CMake 2.8-9.app/Contents/bin/cmake" -E cmake_link_script CMakeFiles/hellovbo.dir/link.txt --verbose=1
/opt/local/bin/g++-mp-4.8   --std=c++11 -Wl,-search_paths_first -Wl,-headerpad_max_install_names   CMakeFiles/hellovbo.dir/main.cpp.o  -o hellovbo  -L/usr/local/lib -lglfw -lglew -framework Cocoa -framework OpenGL -framework IOKit -lstdc++ 
Undefined symbols for architecture x86_64:
  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::basic_string<char, std::char_traits<char>, std::allocator<char> >&&)", referenced from:
  readTextFile(char const*) in main.cpp.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make[2]: *** [hellovbo] Error 1
make[1]: *** [CMakeFiles/hellovbo.dir/all] Error 2
make: *** [all] Error 2

我看过各种帖子说这种错误是由于人们使用 gcc 而不是 g++ 造成的，但就我而言，我使用的是 g++。我正在使用 macports 构建的 GCC 4.8 进行编译。

请注意，这个简单的程序可以在同一系统上正常编译。突然干净安装后，它拒绝编译。

4

2 回答 2

1

缺少的符号是 的移动赋值运算符std::string。我在这里猜测发生了什么是您正在混合使用libstd++和编译的目标文件/库libc++。

于 2012-09-12T06:26:01.413 回答
0

可能您与 /usr/lib/libstdc++ 链接，但对于 4.8，您需要与 (...)/gcc4.8/lib/libstdc++ 链接，它是不同的库。

于 2013-12-09T23:13:24.777 回答