svn commit: r287254 - head/sys/sys
Tijl Coosemans
tijl at FreeBSD.org
Fri Aug 28 15:23:26 UTC 2015
On Fri, 28 Aug 2015 14:06:29 +0000 (UTC) "Pedro F. Giffuni" <pfg at FreeBSD.org> wrote:
> Author: pfg
> Date: Fri Aug 28 14:06:28 2015
> New Revision: 287254
> URL: https://svnweb.freebsd.org/changeset/base/287254
>
> Log:
> Be more GCC-friendly with attributes
>
> Being clang the default compiler, we were always giving precedence to
> the __has_attribute check. Unfortunately clang generally doesn't support
> the new attributes (alloc_size was briefly supported and then reverted)
> so we were always doing both checks. Give the precedence to GCC as that is
> the working case now.
>
> Do the same for __has_builtin() for consistency.
>
> Modified:
> head/sys/sys/cdefs.h
>
> Modified: head/sys/sys/cdefs.h
> ==============================================================================
> --- head/sys/sys/cdefs.h Fri Aug 28 13:57:30 2015 (r287253)
> +++ head/sys/sys/cdefs.h Fri Aug 28 14:06:28 2015 (r287254)
> @@ -237,12 +237,12 @@
> #define __aligned(x) __attribute__((__aligned__(x)))
> #define __section(x) __attribute__((__section__(x)))
> #endif
> -#if __has_attribute(alloc_size) || __GNUC_PREREQ__(4, 3)
> +#if __GNUC_PREREQ__(4, 3) || __has_attribute(alloc_size)
I think you have to add underscores to the __has_attribute argument,
like __alloc_size__ here, because user code is allowed to use
alloc_size.
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