linux-kernel - Re: [PATCH v3] kallsyms: add support for relative offsets in kallsyms address table

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Message-Id: <20160122154358.e6491d6a963747b449731eb9@linux-foundation.org>
Date:	Fri, 22 Jan 2016 15:43:58 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, x86@...nel.org,
	keescook@...omium.org, mingo@...nel.org, hpa@...or.com,
	heiko.carstens@...ibm.com, benh@...nel.crashing.org,
	mpe@...erman.id.au, mmarek@...e.cz, rusty@...tcorp.com.au,
	arnd@...db.de, linux-arch@...r.kernel.org
Subject: Re: [PATCH v3] kallsyms: add support for relative offsets in
 kallsyms address table

On Fri, 22 Jan 2016 15:34:28 -0800 Andrew Morton <akpm@...ux-foundation.org> wrote:

> > Support for the above is enabled by default for all architectures except
> > IA-64, whose symbols are too far apart to capture in this manner.
> 
> scripts/kallsyms.c: In function 'record_relative_base':
> scripts/kallsyms.c:744: error: 'ULLONG_MAX' undeclared (first use in this function)
> scripts/kallsyms.c:744: error: (Each undeclared identifier is reported only once
> scripts/kallsyms.c:744: error: for each function it appears in.)
> 
> That's with (ancient) glibc-headers-2.5-3.  It appears that limits.h's
> ULLONG_MAX requires "#ifdef __USE_ISOC99".  I'm not sure what's the
> correct way of turning this on.

Actually, how about we replace it with -1ULL and get on with life.