Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
Sender: cygwin-owner AT sourceware DOT cygnus DOT com
Delivered-To: mailing list cygwin AT sourceware DOT cygnus DOT com
Message-Id: <199905132203.RAA09590@modi.xraylith.wisc.edu>
X-Authentication-Warning: modi.xraylith.wisc.edu: localhost.xraylith.wisc.edu [127.0.0.1] didn't use HELO protocol
To: "Robert Campbell" <rob AT geonexuscorp DOT com>
cc: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: Undefined Reference to WinMain 
In-reply-to: Your message of "Thu, 13 May 1999 15:57:41 MDT."
             <000301be9d8b$9f5ba170$1605a8c0 AT lyra DOT geonexuscorp DOT com> 
Date: Thu, 13 May 1999 17:03:34 -0500
From: Mumit Khan <khan AT xraylith DOT wisc DOT EDU>

"Robert Campbell" <rob AT geonexuscorp DOT com> writes:
> When compiling up the "V" appgen code, I get the following undefined
> references.  Does anybody have any ideas. (I'm using egcs-1.1.1)
> 
> /cygnus/CYGWIN~1/H-I586~1/i586-cygwin32/bin/ld: warning: cannot find entry
> symbol _WinMainCRTStartup; defaulting to 00401000
> 
> C:\cygnus\CYGWIN~1\H-I586~1\bin/../lib/gcc-lib/i586-cygwin32/egcs-.91.60/../
> ../../../i586-cygwin32/lib/libcygwin.a(libcmain.o): In function `main':
> /home/noer/src/b20/comp-tools/devo/winsup/libcmain.cc:38:
>     undefined reference to  `WinMain AT 16'
> 

Known problem. When linking GUI mode programs, the linker doesn't
explicitly look for WinMain, and if WinMain happens to be in an archive
(as in the case with V GUI), you lose.

Workaround: add "-Wl,-u,_WinMain AT 16" (without the quotes) to GCC flags when 
you link. For more discussion, see the thread titled 'VGUI v 1.21 problem' 
in the Cygwin mailing list archives.

Regards,
Mumit


--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe AT sourceware DOT cygnus DOT com