2012/8/10 Martin Mitáš <[email protected]>
>
> > Clang for now uses "gcc"/"g++" for linking, and uses its runtime
> > libraries libgcc and libstdc++. The way I set this up is to extract
> > the gcc-dw2 and clang-3.1 packages into the same directory. Then
> > everything (C and C++ headers, linker) will be found. binutils etc.
> > are still used, and I believe Clang should be able to link with
> > windres generated objects.
> >
> > Sorry for not explaining clearer. I was planning on uploading a readme
> > to the SF download pages, but I'm doing too much at once.
> >
>
> Much better, the compilation now works smoothly. However there is still
> an issue with linking.
>
> When compiling a DLL (the command is below) from clang-built objects, I
> get linker errors
> for all symbols to-be-exported from the DLL.
>
> $ gcc -mwindows -municode -mdll mctrl.def $OBJECTS -o bin/mCtrl.dll
> -lcomctl32 -lole32 -loleaut32 -Wl,--kill-at
> Cannot export _DllGetVersion@4: symbol not found
> Cannot export _mcButton_Initialize@0: symbol not found
> Cannot export _mcButton_Terminate@0: symbol not found
> Cannot export _mcCreateDialogIndirectParamA@24: symbol not found
> Cannot export _mcCreateDialogIndirectParamW@24: symbol not found
> ... and many more alike ...
>
> I have tried specifying the export symbols in the sources via
> __declspec(dllexport)
> as well as with the .def file and both lead to the same errors.
>
> The same set of objects compiled with gcc and same options is linked
> correctly.
>
> Please note all the symbols-to-be-exported are __stdcall and so far I
> have tried 32bit build only
> so I guess the infamous symbol decorations probably play a role in the
> issue.
>
Would you mind conjuring up a small test case (dll .c file, main.c file and
compile options)? dllexport/dllimport of normal functions should work
(dllexport of C++ classes is WIP). I *seem* to remember using a Clang-built
GSL DLL once before, but I may be mistaken.
>
> (Well, I mostly experiment with clang to just get more warnings and code
> analyzes so
> it does not bother me right now, but you know...)
>
Yes indeed, I use it for that too. And I mostly link statically, so I tend
to miss these DLL issues :)
Thanks,
Ruben
>
> Morous
>
>
>
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