[Bug 35940] Server (and perhaps others) may fail to build on some platforms

https://bugs.winehq.org/show_bug.cgi?id=35940

--- Comment #4 from André H.  ---
(In reply to Carlo Bramini from comment #3)
> But I have some difficulties to understand where I must do a fix for
> removing that option from the generated Makefile for the server, if you
> could give me some tips I could try to provide a patch. Thank you.

AFAICT it comes from output_sources() in tools/makedep.c
While I'm not sure if this is the right place to fix it, it's worth a try.
The other option is to rename the header file...