Re: Trouble compiling Winelib DLL for 64-bit on OpenSUSE

Hi Stefan,

thanks a lot for your advice!

Am 15.10.24 um 22:42 schrieb Stefan Dösinger:
> Wine itself has transitioned to a more formal (fake-)syscall and unix call
> interface to switch between the Windows and the Linux side. I think there are
> no DLLs left in Wine any more that have the old hybrid PE and ELF linkage.


I've read about this transition. Just out of curiousity, would it be 
possible/feasible for external DLL projects (like mine) to transition 
too, especially if they need to call native Linux libraries? (Probably 
not, since we can't link between ELF and PE, right?)

Or will Winelib and the current build/call process be supported for the 
forseeable future?


>> winegcc -m32 -L/usr/lib64/wine/i386-unix -shared -o myproject.dll
>> myproject_main.c myproject.spec
> 
> Does the 32 bit DLL link without the -L path? You shouldn't need it, winegcc
> and winebuild should know their installation path.


No. Winegcc as provided by openSUSE doesn't find the right path.


> It is quite likely a bug on openSUSE's side. They probably didn't even test
> winegcc with the wine-devel packages, as it is a pretty rare case that someone
> needs it.


Since I also gather from your question that -L shouldn't be required, 
I'll think about filing a bug report with openSUSE, as was suggested on 
my original openSUSE Forums post if I should discover that I was doing 
everything correctly.


> I think your best choice would be to build wine from source and install it to
> a custom prefix in your home directory. Hopefully the wine-devel packages pull
> in the right headers etc to make it easy to do.


Absolutely, building Wine from source has fixed the issue. 
Interestingly, I only get the following folder structure

prefix/lib64/wine
  +- i386-windows
  +- x86_64-unix
  +- x86_64-windows

with archive files present in all of these directories, though both 
32-bit and 64-bit versions of my DLL now compile fine (i.e. I correctly 
get a 32-bit/64-bit ELF object). Since it works, I assume this is the 
expected behaviour.

Though I haven't been able to test the 64-bit binary yet, since the 
32-bit version works after compiling with my self-built winegcc, I 
assume that I'm now able to build both versions correctly.

I don't have to pass -L to my self-built winegcc, therefore everything 
works as it should on Wine's side, as far as I can judge that.

Thanks again and best regards,
Alexander Leithner