understanding size command for data bss segment in C

Question

I\'m getting unexpected output from size command.

Afaik initialized global and static variables stored in data segment and uninitialized

Answer 1

This is from gcc on linux:

No Variable
   text    data     bss     dec     hex filename
    915     248       8    1171     493 none.out
Uninitialized Global
   text    data     bss     dec     hex filename
    915     248      12    1175     497 u_g.out
Initialized Global to 123
   text    data     bss     dec     hex filename
    915     252       8    1175     497 i_g.out
Initialized Local to 124
   text    data     bss     dec     hex filename
    915     252       8    1175     497 i_l.out
Initialized Global to 0
   text    data     bss     dec     hex filename
    915     248      12    1175     497 i_g_0.out
Initialized Local to 0
   text    data     bss     dec     hex filename
    915     248      12    1175     497 i_l_0.out

This is from mingw64 on Windows:

No Variable
   text    data     bss     dec     hex filename
   3173    1976     448    5597    15dd none.out
Uninitialized Global
   text    data     bss     dec     hex filename
   3173    1976     464    5613    15ed u_g.out
Initialized Global to 123
   text    data     bss     dec     hex filename
   3173    1976     448    5597    15dd i_g.out
Initialized Local to 124
   text    data     bss     dec     hex filename
   3173    1976     448    5597    15dd i_l.out
Initialized Global to 0
   text    data     bss     dec     hex filename
   3173    1976     480    5629    15fd i_g_0.out
Initialized Local to 0
   text    data     bss     dec     hex filename
   3173    1976     480    5629    15fd i_l_0.out

So although I don't have a final answer to the question (wouldn't fit in a comment), results make me suspect the executable file format of Windows and/or MinGW (i.e. not gcc).