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Subject: WinMain in an own static lib -> _WinMain AT 16 undefined reference ?! ;.(
From: "G.-B. Hauck" <gbhauck AT gmx DOT de>
To: cygwin AT cygwin DOT com
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Date: Wed, 03 Mar 2004 20:02:15 +0100
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Hi Gurus !

I have a problem with cygwin gcc (gcc version 3.3.1 cygwin-special) - i
think that i just don't understand "ld" - so maybe someone can help me
....

For my "Application-Framework" i need to put WinMain(...) in a lib - but
it doesnt work - please take a look on a minimalistic example:

<snip--------------------------------------------------------/>
/* winmain.cc  */
#include <windows.h>
extern "C" void NewEntry();
extern "C" int APIENTRY WinMain(HINSTANCE hI,HINSTANCE hPI,
	LPSTR lpCmdLine,int nCmdShow)
{
	NewEntry();
	return 0;
}

<snip--------------------------------------------------------/>
/* test.cc */
#include <windows.h>
extern "C" void NewEntry()
{
	MessageBox(NULL,"test","test",MB_OK);
}

------------
making test.exe with:
g++ -c winmain.cc
g++ -c test.cc
g++ -mwindows -mno-cygwin -o test.exe winmain.o test.o

is ok -> running test.exe gives you a wonderfull MessageBox ...


BUT:
g++ -c winmain.cc
g++ -c test.cc
ar -rs libmaintest.a winmain.o
g++ -mwindows -mno-cygwin -o test.exe test.o -L./ -lmaintest

/usr/lib/gcc-lib/i686-pc-mingw32/3.3.1/../../../../i686-pc-mingw32/lib/libmingw32.a(main.o)(.text+0x9b):main.c: undefined reference to `_WinMain AT 16'
collect2: ld returned 1 exit status

Why ld can't find _WinMain AT 16 - nm -g libmaintest.a gives:
winmain.o:
         U _NewEntry
00000000 T _WinMain AT 16

Calling the linker with my lib "before" test.o, i.e. 
	g++ -mwindows -mno-cygwin -o test.exe -L./ -lmaintest test.o
gives the same ...

I'm hanging around for two days with this ;-(

TIA and Thank You, Spasibo, Danke, Merci ....
Georg




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