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From: Florian Weimer <fw@deneb.enyo.de>
To: "Paul E. Murphy via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [PATCH v3 1/6] ldbl-128ibm-compat: workaround GCC 9 C++ BZ 90731
References: <cover.1586199342.git.murphyp@linux.vnet.ibm.com>
 <fbe4cf4276936fdf5a21d808f9a7cb3ce4702fa8.1586199342.git.murphyp@linux.vnet.ibm.com>
Date: Wed, 22 Apr 2020 17:11:51 +0200
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 (Paul E. Murphy via Libc-alpha's message of "Mon, 6 Apr 2020 14:12:34
 -0500")
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* Paul E. Murphy via Libc-alpha:

> GCC 9 has a bug (BZ 90731) whereby __typeof does not correctly copy
> exception specifiers[1].  Surprisingly, this can be quieted by declaring
> "#pragma system_header", or if the headers are installed in a system
> directory.

I think GCC developers prefer =E2=80=9CPR90731=E2=80=9D to their bugs.  Thi=
s occurs
multiple times in the commit message and throughout the patch.

This change will still cause errors with -Wsystem-headers in the build
flags, right?  I think we should mention this somewhere, maybe on the
release wiki?