[Mingw-users] [mingw - C/C++] Size of common symbols

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By: patsakh


    Hello.

I have the question: Why GCC uses a rounded size for 
common variables? For example, from this program 

char  gc;
short gs;
long  gl;

int main()
{
    static char  lc = 0;
    static short ls = 0;
    static long  ll = 0;

    return 0;
}

the C compiler generates the following assembly code 

 ...
.lcomm _lc.0,16
.lcomm _ls.1,16
.lcomm _ll.2,16
 ...
.comm	_gc, 16	 # 1
.comm	_gs, 16	 # 2
.comm	_gl, 16	 # 4

i.e. all symbols have a size 16 bytes... 


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