参考
1.The actual compiler is "cc1" for C and "cc1plus" for C++; both gcc and g++ are drivers (which call the preprocessor/compiler/assembler/linker as needed).
2.For c++ you should use g++.
It's the same compiler (e.g. the GNU compiler collection). GCC or G++ just choose a different front-end with different default options.
In a nutshell: if you use g++ the frontend will tell the linker that you may want to link with the C++ standard libraries. The gcc frontend won't do that (also it could link with them if you pass the right command line options).
3.You can link the std C++ library in gcc by passing -lstdc++ parameter.
4. GCC: GNU Compiler Collection
- Referrers to all the different languages that are supported by the GNU compiler.
gcc: GNU C Compiler g++: GNU C++ Compiler
The main differences:
- gcc will compile: *.c/*.cpp files as C and C++ respectively.
- g++ will compile: *.c/*.cpp files but they will all be treated as C++ files.
- Also if you use g++ to link the object files it automatically links in the std C++ libraries (gcc does not do this).
- gcc compiling C files has less predefined macros.
- gcc compiling *.cpp and g++ compiling *.c/*.cpp files has a few extra macros.
Extra Macros when compiling *.cpp files:
#define __GXX_WEAK__ 1#define __cplusplus 1#define __DEPRECATED 1#define __GNUG__ 4#define __EXCEPTIONS 1#define __private_extern__ extern
综上所述:
1.gcc和g++只是一个前端,真正执行编译的是c语言对应的"cc1"和c++对应的"cc1plus"。
2.gcc可以编译、链接c和c++,通过后缀名.c和.cpp来区分。但链接时必须添加-lstdc++参数才能保证c++的正确链接,c语言不用。
3.g++用来编译、链接c++,无论后缀是.c或.cpp,都会当做c++来处理。因为是专为c++做的编译工具,所以编译c++一般用g++。
4.gcc和g++在编译c++时会额外添加几个宏,如上第四点提到的。