编译时出现 C++ 错误
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C++ errors while compiling
提问by Hyman moore
I am trying to compile a game, but getting 100+ errors like:
我正在尝试编译游戏，但收到 100 多个错误，例如：
C:\Users\AppData\Local\Temp\cctQCagR.o: In function `load_image(std::string)':
main.cpp:(.text+0x4bd4): undefined reference to `std::string::c_str() const'
C:\Users\Bill\AppData\Local\Temp\cctQCagR.o: In function `createShip(float, float)':
main.cpp:(.text+0x4da4): undefined reference to `std::allocator<char>::allocator()'
main.cpp:(.text+0x4dbc): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> cons
t&)'
main.cpp:(.text+0x4de4): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::~basic_string()'
main.cpp:(.text+0x4e04): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::~basic_string()'
main.cpp:(.text+0x4e1c): undefined reference to `std::allocator<char>::~allocator()'
main.cpp:(.text+0x4e28): undefined reference to `std::allocator<char>::allocator()'
main.cpp:(.text+0x4e40): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> cons
t&)'
main.cpp:(.text+0x4e60): undefined reference to `std::allocator<char>::~allocator()'
main.cpp:(.text+0x4e70): undefined reference to `__cxa_end_cleanup'
main.cpp:(.text+0x4e98): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::~basic_string()'
main.cpp:(.text+0x4eb8): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::~basic_string()'
main.cpp:(.text+0x4ed0): undefined reference to `std::allocator<char>::~allocator()'
main.cpp:(.text+0x4ef4): undefined reference to `std::allocator<char>::~allocator()'
main.cpp:(.text+0x4f04): undefined reference to `__cxa_end_cleanup'
C:\Users\Bill\AppData\Local\Temp\cctQCagR.o: In function `load_files()':
main.cpp:(.text+0x5164): undefined reference to `std::allocator<char>::allocator()'
main.cpp:(.text+0x517c): undefined reference to `std::basic_string<char, std::char_tra
its<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> cons
t&)'
回答by ntroncos
I believe you're trying to compile main.cpp with gcc instead of g++.
我相信您正在尝试使用 gcc 而不是 g++ 编译 main.cpp。
#include <string>
#include <stdio.h>
int main()
{
std::string bla;
bla = "BLA BLA";
printf("%s\n",bla.c_str());
return 0;
}
If you build the above code snippet with gcc you get the errors you mention. If you use g++ it build ok, this makes sense since g++ will make sure all the proper stuff it put together when build C++.
如果你用 gcc 构建上面的代码片段，你会得到你提到的错误。如果您使用 g++ 它构建正常，这是有道理的，因为 g++ 将确保在构建 C++ 时将所有正确的东西放在一起。
回答by ks1322
You need to link your binary with libstdc++. You need to explicitly specify it in command line if using gcc:
您需要将二进制文件与 libstdc++ 链接。如果使用 gcc，您需要在命令行中明确指定它：
gcc -lstdc++ tmp.cpp
If using g++, libstdc++ will be linked by default:
如果使用 g++，libstdc++ 将默认链接：
g++ tmp.cpp
