From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mathieu Othacehe <m.othacehe@gmail.com>
Subject: bug#38061: [minimal reproducer included] libstdc++ mutex references
 cause clang builds to fail
Date: Tue, 05 Nov 2019 08:59:59 +0100
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To: Carl Dong <contact@carldong.me>
Cc: 38061@debbugs.gnu.org


Hello Carl,

> In my original non-minimal build, other things in <mutex> also cause compilation
> errors, which seem odd to me.

This problem is not directly related to <mutex>. You'll have the same
issue with <list>, <vector> or any other header from stdlib.

As explained here:
https://www.mail-archive.com/guix-devel@gnu.org/msg50183.html, the root
cause is that clang cannot find libstdc++ headers which paths are
hardcoded into gcc.

We need to find a clean way to hardcode those paths into clang. However,
I'm not sure on how to proceed cleanly.

Mathieu