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Re: [PATCH v2] Xen: Update compiler checks


  • To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Thu, 27 Mar 2025 16:39:09 +0000
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  • Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
  • Delivery-date: Thu, 27 Mar 2025 16:39:15 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 27/03/2025 4:31 pm, Andrew Cooper wrote:
> diff --git a/Config.mk b/Config.mk
> index 8a73f3da62b4..a9d62fc10cfa 100644
> --- a/Config.mk
> +++ b/Config.mk
> @@ -125,8 +125,18 @@ define cc-ver-check-closure
>      endif
>  endef
>  
> -# Require GCC v4.1+
> -check-$(gcc) = $(call cc-ver-check,CC,0x040100,"Xen requires at least 
> gcc-4.1")
> +# Minimum GCC version: 5.1, except for RISCV which needs 11.1
> +ifeq ($(XEN_TARGET_ARCH),riscv64)
> +check-$(gcc) = $(call cc-ver-check,CC,0x110100,"Xen requires at least GCC 
> 11.1")
> +else
> +check-$(gcc) = $(call cc-ver-check,CC,0x050100,"Xen requires at least GCC 
> 5.1")
> +endif
> +
> +# Minimum Clang version: 11, x86 only
> +ifeq ($(XEN_TARGET_ARCH),x86_64)
> +check-$(clang) = $(call cc-ver-check,CC,0x110000,"Xen requires at least 
> Clang 11")
> +endif
> +
>  $(eval $(check-y))

No, this doesn't work.  Tracing a RISC-V cross-compile, it's invoked
with different $(CC)'s.

+ gcc -dumpversion
+ awk -F. { printf "0x%02x%02x%02x", $1, $2, $3}
+ [ 786432 -ge 327936 ]
+ echo y
+ riscv64-linux-gnu-gcc -dumpversion
+ awk -F. { printf "0x%02x%02x%02x", $1, $2, $3}
+ [ 786432 -ge 1114368 ]
+ echo n

~Andrew



 


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