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Re: [Xen-devel] [XEN PATCH 8/8] xen: Move GCC_HAS_VISIBILITY_ATTRIBUTE to Kconfig and common
- To: Anthony PERARD <anthony.perard@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 12 Dec 2019 19:04:51 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
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On 12/12/2019 18:27, Anthony PERARD wrote:
> diff --git a/xen/include/xen/compiler.h b/xen/include/xen/compiler.h
> index ff6c0f5cdd18..8c846261d241 100644
> --- a/xen/include/xen/compiler.h
> +++ b/xen/include/xen/compiler.h
> @@ -78,7 +78,7 @@
> #define __must_be_array(a) \
> BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
>
> -#ifdef GCC_HAS_VISIBILITY_ATTRIBUTE
> +#ifdef CONFIG_CC_HAS_VISIBILITY_ATTRIBUTE
> /* Results in more efficient PIC code (no indirections through GOT or PLT).
> */
> #pragma GCC visibility push(hidden)
(I realise we are getting into archaeology, but) Why do we have this as
a pragma gcc?
Surely it would be simpler to just feed -fvisibility=hidden into CFLAGS?
Ack for the overall change, but I expect we can clean this up a bit more
as well.
~Andrew
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