linux-kernel - RE: Build failures with gcc 4.5 and older

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Message-ID: <aa4bedb7b1af45c59ff4e61f3f199287@AcuMS.aculab.com>
Date:   Wed, 15 Aug 2018 12:40:22 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Guenter Roeck' <linux@...ck-us.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Rik van Riel <riel@...riel.com>, Mike Galbraith <efault@....de>,
        "Dave Hansen" <dave.hansen@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: Build failures with gcc 4.5 and older

From: Guenter Roeck
> Sent: 14 August 2018 18:09
...
> Does that mean that gcc 4.5 and older are now officially no longer
> supported for compiling the kernel ?

Never mind the version of gcc, the x86 kernel doesn't build with the
default kernel options because the ORC unwinder hits a bug in libelf
(in objtool) that was only fixed late last year.

It isn't even obvious from the build log what has gone wrong.

	David

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