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Date: Fri, 20 Jan 2023 17:06:08 +0000
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Subject: Re: [GCC][PATCH v4] arm: Add pacbti related multilib support for
 armv8.1-m.main.
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To: Srinath Parvathaneni <Srinath.Parvathaneni@arm.com>,
 gcc Patches <gcc-patches@gcc.gnu.org>
Cc: Richard Earnshaw <Richard.Earnshaw@arm.com>,
 Kyrylo Tkachov <Kyrylo.Tkachov@arm.com>
References: <VE1PR08MB48932F30DEA3BD35AD63F40B9BC29@VE1PR08MB4893.eurprd08.prod.outlook.com>
From: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>
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On 13/01/2023 17:46, Srinath Parvathaneni via Gcc-patches wrote:
> Hi,
> 
> This patch adds the support for pacbti multlilib linking by making
> "-mbranch-protection=none" as default multilib option for arm-none-eabi
> target.
> 
> Eg 1.
> 
> If the passed command line flags are (without mbranch-protection):
> a) -march=armv8.1-m.main+mve -mfloat-abi=hard -mfpu=auto
> 
> "-mbranch-protection=none" will be used in the multilib matching.
> 
> Eg 2.
> 
> If the passed command line flags are (with mbranch-protection):
> a) -march=armv8.1-m.main+mve+pacbti -mfloat-abi=hard -mfpu=auto  -mbranch-protection=pac-ret
> 
> "-mbranch-protection=standard" will be used in the multilib matching.
> 
> Regression tested on arm-none-eabi and bootstrapped on arm-none-linux-gnueabihf.
> 
> Ok for master?
> 
> Regards,
> Srinath.
> 
> gcc/ChangeLog:
> 
> 2023-01-11  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
> 
>          * config.gcc ($tm_file): Update variable.
>          * config/arm/arm-mlib.h: Create new header file.
>          * config/arm/t-rmprofile (MULTI_ARCH_DIRS_RM): Rename mbranch-protection
>          multilib arch directory.
>          (MULTILIB_REUSE): Add multilib reuse rules.
>          (MULTILIB_MATCHES): Add multilib match rules.
> 
> gcc/testsuite/ChangeLog:
> 
> 2023-01-11  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
> 
>          * gcc.target/arm/multilib.exp (multilib_config "rmprofile"): Update
>          tests.
>          * gcc.target/arm/pac-12.c: New test.
>          * gcc.target/arm/pac-13.c: Likewise.
>          * gcc.target/arm/pac-14.c: Likewise.

OK.

R.