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Date: Sun, 30 Sep 2012 17:22:13 -0700 From: Josh Triplett <josh@...htriplett.org> To: Daniel Santos <daniel.santos@...ox.com> Cc: LKML <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...ux.intel.com>, Andrea Arcangeli <aarcange@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Christopher Li <sparse@...isli.org>, David Daney <david.daney@...ium.com>, David Howells <dhowells@...hat.com>, Joe Perches <joe@...ches.com>, Konstantin Khlebnikov <khlebnikov@...nvz.org>, linux-sparse@...r.kernel.org, Michel Lespinasse <walken@...gle.com>, Paul Gortmaker <paul.gortmaker@...driver.com>, Pavel Pisa <pisa@....felk.cvut.cz>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Steven Rostedt <rostedt@...dmis.org>, Borislav Petkov <bp@...en8.de> Subject: Re: [PATCH 3/10] compiler-gcc.h: Add gcc-recommended GCC_VERSION macro On Sun, Sep 30, 2012 at 06:11:01PM -0500, Daniel Santos wrote: > So in light of feedback I've been getting on this patch set, it leaves > me with > this question. > > +#define GCC_VERSION (__GNUC__ * 10000 \ > > + + __GNUC_MINOR__ * 100 \ > > + + __GNUC_PATCHLEVEL__) > This macro presumes you are using gcc 3.0 or later, which introduced the > __GNUC_PATCHLEVEL__ predefined macro. Should you be using a version of gcc > prior to 3.0 (where the macro is undefined), you would get an error that > __GNUC_PATCHLEVEL__ is undefined prior to getting the error trying to > include > "linux/compiler-gcc2.h". So it presumes the compiler is 3.0+, when another > part of the code may allow it from a future change. Should it be > modified to > do account for this or would that be overkill? Overkill, since Linux requires GCC 3.2 or newer. From compiler-gcc3.h: #if __GNUC_MINOR__ < 2 # error Sorry, your compiler is too old - please upgrade it. #endif - Josh Triplett -- 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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