linux-kernel - Re: [PATCH v6 05/19] arm64:uapi: set __BITS_PER

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Date:	Thu, 3 Dec 2015 12:36:50 +0100
From:	"Dr. Philipp Tomsich" <philipp.tomsich@...obroma-systems.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Yury Norov <ynorov@...iumnetworks.com>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel@...r.kernel.org, Andrew Pinski <pinskia@...il.com>,
	Prasun.Kapoor@...iumnetworks.com, Andreas Schwab <schwab@...e.de>,
	Nathan Lynch <Nathan_Lynch@...tor.com>,
	Alexander Graf <agraf@...e.de>, klimov.linux@...il.com,
	broonie@...nel.org, jan.dakinevich@...il.com,
	ddaney.cavm@...il.com, bamvor.zhangjian@...wei.com,
	andrey.konovalov@...aro.org, joseph@...esourcery.com,
	christoph.muellner@...obroma-systems.com
Subject: Re: [PATCH v6 05/19] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64

Catalin,

> Quick question: IIRC, earlier aarch64 gcc versions did not generate
> __ILP32__ when -mabi=ilp32, they only removed __LP64__. When did the
> change happen? Could we assume that all compiler versions used to
> generate ILP32 would define this?

The __ILP32__ define has been supported since 
> commit b01b37f5768911598640cf8a8c82beacb4200c13
> Author: yufeng <yufeng@...bc75d-0d04-0410-961f-82ee72b054a4>
> Date:   Tue Jul 23 12:26:33 2013 +0000
> 
>     [AArch64, ILP32] 4/6 Define _ILP32 and __ILP32__.
>     
>     gcc/
>     
>         * config/aarch64/aarch64.h (TARGET_CPU_CPP_BUILTINS): Define _ILP32
>         and __ILP32__ when the ILP32 model is in use.
>     
>     
>     git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@...167 138bc75d-0d04-0410-961f-82ee72b054a4

Best regards,
Philipp.--
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