[Bug 52420] Wine 7.0 WoW64 Release Compiled with Clang on Arch Produces a Broken Build

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52420

nekoNexus at protonmail.ch changed:

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  Attachment #71681|0                           |1
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--- Comment #6 from nekoNexus at protonmail.ch ---
Created attachment 71693
  --> https://bugs.winehq.org/attachment.cgi?id=71693
Arch PKGBUILD File for Wine 7.0 Release

So, I managed to narrow it down a bit but not completely (I'm also updating the
attachment with my findings for Arch makepkg repoduction):

- If the clang build is pure clang, it will compile, but won't run (tested by
running winecfg)

- If the the clang build has mingw enabled, it will compile, but only if ld is
used and lld isn't used

- If mingw is enabled with a clang build, relro can't be used because mingw's
ld doesn't like the "-z" argument for whatever reason

- If the build succeeds with Clang and mingw (which it always will, provided
the above two points are followed), the resulting WoW64 build will run but will
throw one stack overflow error

- If certain CFLAGS are passed to clang, the resulting build will throw 3 stack
overflow errors; an example would be something like this:

> export CFLAGS="-O3 -pipe -fno-plt -minline-all-stringops -fexceptions -Wall \
>            -Wformat -Werror=format-security \
>            -fstack-clash-protection -fcf-protection"

-----

That said, as a reminder, even with the stack overflow errors Wine will still
run but a few things are made clear:

- Pure clang builds have some kind of problem preventing use, even with simple
flag setups like: "-O3 -pipe -std=gnu89"

- Clang + mingw builds run but I wouldn't trust a build spontaneously throwing
overflow errors

and

- Clang + mingw builds require compromising relro

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