Mail Archives: cygwin/2004/09/21/12:15:52
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.
Larry Hall a écrit :
>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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--
*_Frédéric ORMANCEY_*
Atos Origin Systems Integration
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