Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Message-ID: <4151707C.1050401@atosorigin.com> Date: Wed, 22 Sep 2004 12:30:52 +0000 From: =?ISO-8859-1?Q?Fr=E9d=E9ric_ORMANCEY?= Reply-To: frederic DOT ormancey AT atosorigin DOT com Organization: AtosOrigin User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; fr-FR; rv:1.6) Gecko/20040113 MIME-Version: 1.0 To: Cygwin List Subject: Re: Lot of undefined symbols at link time, even with -l option on good libraries References: <414FF698 DOT 4010702 AT atosorigin DOT com> <6 DOT 1 DOT 0 DOT 6 DOT 0 DOT 20040921091604 DOT 03d5b528 AT pop DOT prospeed DOT net> <41505394 DOT 9020105 AT atosorigin DOT com> <6 DOT 1 DOT 0 DOT 6 DOT 0 DOT 20040921122405 DOT 03dca210 AT pop DOT prospeed DOT net> In-Reply-To: <6.1.0.6.0.20040921122405.03dca210@pop.prospeed.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-IsSubscribed: yes Note-from-DJ: This may be spam problem seems coming from trailing @nn in library symbols. cygwin linker don't know how to translate a reference like _FormatMessageA to _FormatMessageA AT 28 the calling convention ( C, Stdcall, C++, ... ) has effect only on underscore preceeding symbol name, not on @nn notation. It seems there is no solutions to this problem, I will abandon cygwin to build my Ada application under windows :-( Larry Hall a écrit : >At 12:15 PM 9/21/2004, you wrote: > > >>I think you're right, it seems to be a problem with trailing underscore in function naming. >>For example : >> >>in /usr/lib/w32api/libkernel32.a we found : >> >> 00000000 T _FormatMessageA AT 28 >> U __head_libkernel32_a >> 00000000 I __imp__FormatMessageA AT 28 >> >>which is required by win32-winbase.o, result of the build of /usr/lib/gcc/win32ada/win32-winbase.adb >> U _FormatMessageA >> U _FormatMessageW >> U _GlobalReAlloc >> U _LocalReAlloc >> >>The source code for this part is the following : >> pragma Import (Stdcall, Doit, "FormatMessageA"); >> >>I try change it with pragma Import (C, Doit, "_FormatMessageA"); or things like that with no success. >> >>May be it's the trailing @28 after symbol name which cause error, but I cannot control it ( it's DLL calling convention parameter size ). Compiler/linker should usually add or remove trailing @nn if necessary. >> >>To answer your general questions, I'am building a large Ada application ( 200 source files ), using W32 API, with Win2000 GNAT Compiler. >> >> >> > > >Sorry, I know nothing about Ada and how it works. If the "pragma" statement >is supposed to take the place of the traditional function prototype in C/C++, >then I agree that it looks "OK" (again, based on my knowledge of Ada). But >the result is that it's looking for symbols that use the 'C' calling >convention rather than the 'stdcall' calling convention. The libraries you >are linking to want the 'stdcall' calling convention (since it is the >default for Windows). If you cannot get Ada to ask for the proper symbol, >you could try using the '--enable-stdcall-fixup' option (for 'ld') to >attempt to massage away the problem. > > > >-- >Larry Hall http://www.rfk.com >RFK Partners, Inc. (508) 893-9779 - RFK Office >838 Washington Street (508) 893-9889 - FAX >Holliston, MA 01746 > > > > -- *_Frédéric ORMANCEY_* Atos Origin Systems Integration /rue Ampère - BP 475 31315 Labège Cedex/ /Tel// /: 05 61 39 75 21 /Fax /: 05 61 39 16 65 frederic DOT ormancey AT atosorigin DOT com www.si.fr.atosorigin.com ======================================================================================================= Ce message électronique est confidentiel. Il peut contenir des informations protégées par le secret professionnel, le secret de fabrication ou autres règles légales. Si vous recevez ce message par erreur, il vous est interdit de le reproduire ou de le distribuer en tout ou partie, ou de le divulguer de quelque manière que ce soit à quelque personne que ce soit. Nous vous prions de bien vouloir en informer Atos Origin, par téléphone ou par retour d'e-mail puis de détruire le message et toutes copies de votre système informatique. 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