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Fucking MingW

Name: Cudder !MhMRSATORI!fR8duoqGZdD/iE5 2012-11-04 9:11

#include <stdio.h>

int main() {
 printf("Hello world!\n");
 return 0;
}


Default MingW compilation+link size: 47KB
Best MingW compilation+link size: 8KB

Default MSVC compilation+link size: 40KB
Best MSVC compilation+link size: 1KB

After postprocessing:
MingW (using MS's linker and libs): 1594 bytes
MSVC: 624 bytes

What the fuck? Am I missing something here?

MingW optimised command line (compile only):
gcc -nostdlib -Os -c -s -o hello.obj hello.c -Wl,--gc-sections,--section-alignment,4096,--file-alignment,512

MingW link command line:
link hello.obj msvcrtlib mainstub.obj /align:4096 /filealign:512 /entry:main /merge:.rdata=.text /merge:.eh_fram=.text /merge:.text.st=.text /section:.text,EWR /stub:mzstub64.exe

mainstub.obj is a dummy __main because libming32.a which is supposed to contain it also contains __CTOR_LIST_ and some other C++ shit. I'm compiling a C program, with gcc, and they force you to link with a bunch of C++ shit? Are you kidding me?

(Why won't it merge the bloody .eh_fram and .text.st sections?!?! Maybe this is a bug of MS's linker since it merges fine with its own compiler output, but the compiler shouldn't be generating .eh_fram and .text.st anyway!)

Executables for your inspecting:
MingW: http://pastebin.com/vZn5WtMz
MSVC: http://pastebin.com/AV63Hr5x

Therefore, I challenge anyone to come up with a smaller Hello World using MingW, and post the commands you used to do it.

Name: Cudder !MhMRSATORI!fR8duoqGZdD/iE5 2012-11-06 6:57

>>56
To be exact it's a push sign-extended byte constant, but it's not a "pseudo instruction" (does x86 even have those? the closest I can think is xchg eax == nop), it's right there at position 6A in the opcode map.

and on amd64 it's even an illegal instruction all together.
They really messed up with AMD64. Not going to say more about that.

actual benchmarks done shows gcc and msvc being pretty much equal in code generation performance.
Was that size, speed, or both? I don't care about absolute speed that sacrifices everything else. This is max size opts for both compilers.

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