What are the values that the compiler can take for this flag?  Also,
this seems like something that can be addressed with the tuning
mechanism, so we can run 'guix build foo --tune' and it'll do The Right
Thing™.

Alternatively, if we do go this route, you still need to update the
documentation.

On Sat, Nov 11, 2023 at 01:09:07PM +0000, Ekaitz Zarraga wrote:
> From a647a8ee689022cafef4bab05784b32b1c97bee7 Mon Sep 17 00:00:00 2001
> Message-ID: <a647a8ee689022cafef4bab05784b32b1c97bee7.1699708101.git.ekaitz@elenq.tech>
> From: Ekaitz Zarraga <ekaitz@elenq.tech>
> Date: Sat, 11 Nov 2023 14:05:23 +0100
> Subject: [PATCH] build: zig-build-system: Add CPU option
> 
> Zig packages are optimized by default, adding `-Dcpu=baseline` to the
> build command builds them for an standard cpu that should work in every
> machine.
> 
> This change sets that by default but also allows users to choose their
> cpu by the `#:zig-cpu` argument.
> 
> * guix/build-system/zig.scm (build): add zig-cpu
> * guix/build/zig-build-system.scm (zig-build) add zig-cpu
> 
> Change-Id: Ib4b2124179e7b5492e7c77c64e1f8336832032ea
> ---
>  guix/build-system/zig.scm       | 2 ++
>  guix/build/zig-build-system.scm | 2 ++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/guix/build-system/zig.scm b/guix/build-system/zig.scm
> index 16b8a712cc..f90e76104e 100644
> --- a/guix/build-system/zig.scm
> +++ b/guix/build-system/zig.scm
> @@ -47,6 +47,7 @@ (define* (zig-build name inputs
>                      source
>                      (tests? #t)
>                      (test-target #f)
> +                    (zig-cpu #f)
>                      (zig-build-flags ''())
>                      (zig-test-flags ''())
>                      (zig-release-type #f)
> @@ -67,6 +68,7 @@ (define* (zig-build name inputs
>                       #:source #+source
>                       #:system #$system
>                       #:test-target #$test-target
> +                     #:zig-cpu #$zig-cpu
>                       #:zig-build-flags #$zig-build-flags
>                       #:zig-test-flags #$zig-test-flags
>                       #:zig-release-type #$zig-release-type
> diff --git a/guix/build/zig-build-system.scm b/guix/build/zig-build-system.scm
> index d414ebfb17..99a81314d4 100644
> --- a/guix/build/zig-build-system.scm
> +++ b/guix/build/zig-build-system.scm
> @@ -44,6 +44,7 @@ (define* (set-zig-global-cache-dir #:rest args)
>    (setenv "ZIG_GLOBAL_CACHE_DIR" global-cache-dir))
>  
>  (define* (build #:key
> +                zig-cpu
>                  zig-build-flags
>                  zig-release-type       ;; "safe", "fast" or "small" empty for a
>                                         ;; debug build"
> @@ -59,6 +60,7 @@ (define* (build #:key
>                       ,@(if zig-release-type
>                           (list (string-append "-Drelease-" zig-release-type))
>                           '())
> +                     ,(string-append "-Dcpu=" (or zig-cpu "baseline"))
>                       ,@zig-build-flags)))
>    (format #t "running: ~s~%" call)
>    (apply invoke call)))
> 
> base-commit: af6105afc67a15a491a0a4fd18a28c9f801a0b94
> -- 
> 2.41.0
> 
> 
> 
> 
> 

-- 
Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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