gcc 和 g++

用gcc 编译链接cpp源码

先给出源码及编译链接结果：

me.h：

extern "C" void CppPrintf(void);

me.cpp:

#include 
#include "me.h"
using namespace std;
void CppPrintf(void)
{
     cout << "Hello\n";
}

test.cpp:

#include "me.h"        
int main(void)
{
    CppPrintf();
    return 0;
}

g++:

g++  test.cpp me.cpp -o test
g++  -g -Wall -std=c++11 test.cpp me.cpp -o test

gcc:

gcc -g -Wall -std=c++11 test.cpp me.cpp -o test -lstdc++
gcc -g -Wall -std=c++11 test.cpp me.cpp -o test -lstdc++ -shared-libgcc

注意，下面的是行不通的(-lstdc++ -shared-libgcc一定要放后面)

gcc -g -Wall -std=c++11 -lstdc++ -shared-libgcc test.cpp me.cpp -o test 

说明关系

平时使用gcc/g++，看了网上的一些回答和gcc的关系，感觉很多不太准确，或者缺少例子，就记录一下。stackoverflow上大致意思是，
g++  <<=等价于=>>  gcc -xc++  -lstdc++  -shared-libgcc (the 1st is a compiler option, the 2nd two are linker options)

有一哥列出了下面这些区别，

The main differences:
1.gcc will compile: *.c/*.cpp files as C and C++ respectively.
2.g++ will compile: *.c/*.cpp files but they will all be treated as C++ files.
3.Also if you use g++ to link the object files it automatically links in the std C++ libraries (gcc does not do this).
4.gcc compiling C files has fewer predefined macros.
5.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

但我没找到官方的出处。

参考：
https://stackoverflow.com/questions/172587/what-is-the-difference-between-g-and-gcc

官方文档中提到g++也没明确说明，只在第3.3节说明对C++文件应该使用g++，参考：
https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc.pdf

其他参考

https://blog.csdn.net/bit_clearoff/article/details/53965514