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Date: Thu, 30 Sep 2010 18:01:00 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Jan Beulich <JBeulich@...ell.com>, Ingo Molnar <mingo@...e.hu>, heukelum@...tmail.fm, tglx@...utronix.de, LKML <linux-kernel@...r.kernel.org> Subject: Re: gas 2.16 and assembly macros -- entry_64.S build failure On Thu, 30 Sep 2010 17:26:13 -0700 "H. Peter Anvin" <hpa@...or.com> wrote: > On 09/16/2010 04:21 AM, Jan Beulich wrote: > >> > >> Yes, to only generate CFI on binutils that allows us to write sane > >> looking code. > >> > >> I.e. to disable CONFIG_AS_CFI on binutils that are broken for this. > > > > Again - that won't help, as it's the macro invocation that gas > > fails one, not one of the actual .cfi_* directives. > > > > Looking again at this issue with the binutils version from hell > (sigh)... I'm running quickly out of ideas. > > The problem is that cpp inserts spaces around expansions, so: > > pushq_cfi $(USER_DS) > > ... turns into something like ... > > pushq_cfi $( ( 5 * 8 + 3 ) ) > > ... which these old versions of gas considers multiple arguments to the > macro, even though there is no comma anywhere. Could we run another little program after cpp which takes the spaces out again? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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