linux-kernel - Re: [UML] 3.16 build without optimization fails

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Message-ID: <20267.1408478794@turing-police.cc.vt.edu>
Date:	Tue, 19 Aug 2014 16:06:34 -0400
From:	Valdis.Kletnieks@...edu
To:	Thomas Meyer <thomas@...3r.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [UML] 3.16 build without optimization fails

On Tue, 19 Aug 2014 21:12:10 +0200, Thomas Meyer said:
> > Hi,
> >
> > the build with -O0 fails with:

> > bug or feature?
> >
> > any ideas?

Feature.  The kernel is *known* to not build with -O0, because that
disables *all* function inlining, and there's several functions that *have*
to be inlined in order to function properly (most notably, anything
that uses the gcc __builtin_return_address in a function that is expected
to be inlined).

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