From: fjh AT cs DOT mu DOT OZ DOT AU (Fergus Henderson)
Subject: Re: DLL problem
30 Aug 1997 18:56:18 -0700
Approved: cygnus DOT gnu-win32 AT cygnus DOT com
Distribution: cygnus
Message-ID: <199708240910.TAA18108.cygnus.gnu-win32@murlibobo.cs.mu.OZ.AU>
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Original-To: stf AT hugo DOT int-evry DOT fr (Stephane Mariel)
Original-Cc: gnu-win32 AT cygnus DOT com (Cygnus GNU-win32 mailing list)
In-Reply-To: <199708190947.LAA20111@hugo.int-evry.fr> from Stephane Mariel at "Aug 19, 97 11:47:23 am"
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Stephane Mariel, you wrote:
> I'm trying to port a unix network tool (at least the client) to Win95/NT ,
> since there is a DLL to create, I tested the example provided on
> www.cygnus.com.
> 
> It works fine, i got my foo.dll, main.exe, but moving to my real software
> when I run ld for the first time I got
> 
> c:/gnuwin32/b18/H-i386-cygwin32/i386-cygwin32/lib/libcygwin.a(libccrt0.o)(.t
> ext+0x8a):libccrt0.cc: undefined reference to `GetModuleHandleA AT 4'
> c:/gnuwin32/b18/H-i386-cygwin32/i386-cygwin32/lib/libcygwin.a(libcmain.o)(.t
> ext+0xc):libcmain.cc: undefined reference to `GetModuleHandleA AT 4'
> c:/gnuwin32/b18/H-i386-cygwin32/i386-cygwin32/lib/libcygwin.a(libcmain.o)(.t
> ext+0x15):libcmain.cc: undefined reference to `GetCommandLineA AT 0'
> c:/gnuwin32/b18/H-i386-cygwin32/i386-cygwin32/lib/libcygwin.a(libcmain.o)(.t
> ext+0x1e):libcmain.cc: undefined reference to `WinMain AT 16'

This occurs because there is no definition for `_impure_ptr' in your DLL.
See <http://www.cs.mu.oz.au/~fjh/gnu-win32/how-to-build-dlls.html>
for a brief explanation about `_impure_ptr'.

-- 
Fergus Henderson <fjh AT cs DOT mu DOT oz DOT au>   |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>   |  of excellence is a lethal habit"
PGP: finger fjh AT 128 DOT 250 DOT 37 DOT 3         |     -- the last words of T. S. Garp.
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