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Date: Tue, 21 Sep 2004 09:22:22 -0400
To: frederic DOT ormancey AT atosorigin DOT com, cygwin AT cygwin DOT com
From: Larry Hall <lh-no-personal-replies-please AT cygwin DOT com>
Subject: Re: Lot of undefined symbols at link time, even with -l option on good libraries
In-Reply-To: <414FF698.4010702@atosorigin.com>
References: <414FF698 DOT 4010702 AT atosorigin DOT com>
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At 05:38 AM 9/21/2004, you wrote:
> Using latest release of CygWin ( 1.5.11-1 ) I install the devel kit,
>
>including gcc and gnat compilers. Then I build from src GCC and GNAT release 3.4.1 ( which include necessary patchs for my application ).
>All my Ada application compile well with gnatmake command, but link failed with a lot of undefined symbols mainly issued from w32api and system libraries.
>
>Undefined symbols are for example : FormatMessageA, GlobalReAlloc, CreateDialogParamA, WSAStartup, accept, select, ... about 100 undefined from system libraries.
>Of course system libraries are included at link time with the appropriate -l option ( -lnetapi32 -lwsock32 -lshell32 -ladvapi32 -lwinmm -lodbc32 -lwin32ada -luser32 -lgdi32 -lcomdlg32 -laddr2line -lbfd -liberty )
>I verify with NM command, symbols are right defined in the included libraries.
>
>If someone have an idea ?

Sure.  Follow the problem reporting guidelines given here:

>Problem reports:       http://cygwin.com/problems.html


That will give those on the list interested in helping you out with this 
problem at least the basic information about your system and what you're 
doing.  

My WAG is that you haven't declared these symbols properly so that the 
calling convention is wrong (__cdecl vs __stdcall) but I'd need to see 
a small example of your code, how you compile it, and what the errors
are to be sure.  Then again, maybe this idea is enough for you to have an 
"AHA!" moment and fix the problem yourself. :-)


--
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
838 Washington Street                   (508) 893-9889 - FAX
Holliston, MA 01746                     


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