[Bug 58377] New: winegcc -m32 fails to link when using the new WoW64 mode

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58377

Bug ID: 58377
           Summary: winegcc -m32 fails to link when using the new WoW64
                    mode
           Product: Wine
           Version: 10.9
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winelib
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 78787
  --> http://bugs.winehq.org/attachment.cgi?id=78787
winegcc command output

Prompted by Arch switching to the new WoW64 mode in their packages. 32-bit
winelib binaries seem to fail to link with the new WoW64 mode. I attached the
output of compiling the following file with winegcc from a Wine build
configured
with `--enable-archs=i386,x86_64`:

/* main.c */
    int main() { return 0; }

/* compiled with: LANG=C wineg++ -v -m32 -lole32 -o main main.c */

Swapping `-m32` out for `-m64` the winelib binary builds as expected. Most
notably, the underlying GCC invocations include both `-m64` and `-m32` in that
order (though it may have always done that), and the core Windows libraries
cannot be found (which kind of makes sense since Wine no longer ships actual
32-bit libraries).

On a related note: is it possible to detect whether Wine has been configured
with the new WoW64 mode? I may need to detect this at runtime to be able to
distribute a build of yabridge that works with both the old and new WoW64
modes.