Re: [PATCH 1/2] make kernel module build reproducible

[Uladzimir Bely <ubely@ilbers.de>]

On Fri, 2024-09-13 at 17:16 +0200, 'Felix Moessbauer' via isar-users
wrote:
> The debug information of kernel modules contain absolute file paths
> into the builder schroot. To fix this, we inject a debug-prefix-map,
> similar to how it is already done for the kernel build. While doing
> that, we also enable the user to inject other KCFLAGS and KAFLAGS as
> well.
> 
> Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
> ---
>  meta/recipes-kernel/linux-module/files/debian/rules.tmpl | 2 +-
>  meta/recipes-kernel/linux-module/module.inc              | 6 ++++++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/meta/recipes-kernel/linux-module/files/debian/rules.tmpl
> b/meta/recipes-kernel/linux-module/files/debian/rules.tmpl
> index bc4e09cb..7511a17d 100755
> --- a/meta/recipes-kernel/linux-module/files/debian/rules.tmpl
> +++ b/meta/recipes-kernel/linux-module/files/debian/rules.tmpl
> @@ -49,7 +49,7 @@ override_dh_auto_clean:
>  	$(MAKE) -C $(KDIR) M=${MODULE_DIR} clean
>  
>  override_dh_auto_build:
> -	$(MAKE) -C $(KDIR) M=${MODULE_DIR} $(PARALLEL_MAKE) modules
> +	$(MAKE) -C $(KDIR) M=${MODULE_DIR} $(PARALLEL_MAKE)
> KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" modules
>  ifneq ($(filter pkg.sign,$(DEB_BUILD_PROFILES)),)
>  	find . -name "*.ko" -print -exec $(KDIR)/scripts/sign-file
> ${SIGNATURE_HASHFN} ${SIGNATURE_KEYFILE} ${SIGNATURE_CERTFILE} {} \;
>  endif
> diff --git a/meta/recipes-kernel/linux-module/module.inc
> b/meta/recipes-kernel/linux-module/module.inc
> index 229e6a5c..344dc50f 100644
> --- a/meta/recipes-kernel/linux-module/module.inc
> +++ b/meta/recipes-kernel/linux-module/module.inc
> @@ -48,6 +48,8 @@ TEMPLATE_VARS += " \
>      KERNEL_TYPE \
>      KERNEL_IMAGE_PKG \
>      KERNEL_HEADERS_PKG \
> +    KCFLAGS \
> +    KAFLAGS \
>      MODULE_DIR \
>      DEBIAN_BUILD_DEPENDS \
>      SIGNATURE_KEYFILE \
> @@ -55,6 +57,10 @@ TEMPLATE_VARS += " \
>      SIGNATURE_HASHFN \
>      PN"
>  
> +# Add custom cflags to the kernel build
> +KCFLAGS ?= "-fdebug-prefix-map=${CURDIR}=. -fmacro-prefix-
> map=${CURDIR}=."
> +KAFLAGS ?= "-fdebug-prefix-map=${CURDIR}=."
> +
>  do_prepare_build() {
>      rm -rf ${S}/debian
>      cp -r ${WORKDIR}/debian ${S}/
> -- 
> 2.39.2
> 

Applied to next, thanks.

-- 
Best regards,
Uladzimir.

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