[Buildroot] [PATCH 3/3] package/abootimg: add host build for abootimg Build abootimg on the host, and use it to build a kernel image for the DB410c.

[Thomas Petazzoni]

Hello,

On Tue, 27 Oct 2020 20:50:56 +1300
Mike Frampton <mikeframpo at gmail.com> wrote:

> Signed-off-by: Mike Frampton <mikeframpo at gmail.com>
> ---
>  board/qcom/db410c/post-image.sh | 21 +++++++++++++++++++++
>  configs/qcom_db410c_defconfig   |  4 ++++
>  package/Config.in.host          |  1 +
>  package/abootimg/Config.in.host |  8 ++++++++
>  package/abootimg/abootimg.mk    | 12 ++++++++++++
>  5 files changed, 46 insertions(+)
>  create mode 100755 board/qcom/db410c/post-image.sh
>  create mode 100644 package/abootimg/Config.in.host

There should be one commit adding support for abootimg as a host
package, and then the commit adding the defconfig file together with
its post-image script.

> diff --git a/board/qcom/db410c/post-image.sh b/board/qcom/db410c/post-image.sh
> new file mode 100755
> index 0000000000..5182b655d2
> --- /dev/null
> +++ b/board/qcom/db410c/post-image.sh
> @@ -0,0 +1,21 @@
> +#!/bin/bash
> +
> +set -e
> +
> +OUTIMG=$BINARIES_DIR/boot-db410c.img
> +KERNEL_BUILD=$BUILD_DIR/linux-release_qcomlt-5.4
> +
> +cp $KERNEL_BUILD/arch/arm64/boot/dts/qcom/apq8016-sbc.dtb $BINARIES_DIR
> +cp $KERNEL_BUILD/arch/arm64/boot/Image.gz $BINARIES_DIR

This shouldn't be necessary: the linux package already installs the
kernel image and DTB in BINARIES_DIR. And this would avoid the need to
hardcode the KERNEL_BUILD directory.

> +# now assemble the bootimg
> +#cd $BINARIES_DIR

Line commented, not needed.

> +cat $BINARIES_DIR/Image.gz $BINARIES_DIR/apq8016-sbc.dtb > $BINARIES_DIR/Image.gz+dtb
> +echo "not a ramdisk" > $BINARIES_DIR/ramdisk.img
> +
> +abootimg --create $OUTIMG -k $BINARIES_DIR/Image.gz+dtb -r $BINARIES_DIR/ramdisk.img \
> +	-c pagesize=2048 -c kerneladdr=0x80008000 -c ramdiskaddr=0x81000000 \
> +	-c cmdline="root=/dev/mmcblk1p13 rw rootwait console=tty0 console=ttyMSM0,115200n8"
> +
> +echo "boot img written to $OUTIMG"

This last line is not needed.

Instead, what we like is to have a board/qcom/db410c/readme.txt file
that explains how to use/build/flash this defconfig. See other
readme.txt files in board/ for a number of examples.

> diff --git a/package/abootimg/abootimg.mk b/package/abootimg/abootimg.mk
> index e906546948..6a4cd01586 100644
> --- a/package/abootimg/abootimg.mk
> +++ b/package/abootimg/abootimg.mk
> @@ -11,6 +11,7 @@ ABOOTIMG_LICENSE_FILES = LICENSE
>  
>  # depends on libblkid from util-linux
>  ABOOTIMG_DEPENDENCIES = util-linux
> +ABOOTIMG_HOST_DEPENDENCIES = host-util-linux
>  
>  define ABOOTIMG_BUILD_CMDS
>  	$(TARGET_MAKE_ENV) $(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D)
> @@ -20,4 +21,15 @@ define ABOOTIMG_INSTALL_TARGET_CMDS
>  	$(INSTALL) -m 0755 $(@D)/abootimg $(TARGET_DIR)/usr/bin/abootimg
>  endef
>  
> +# host build

This comment is not needed, it's pretty obvious.

> +define HOST_ABOOTIMG_BUILD_CMDS
> +	$(MAKE) $(HOST_CONFIGURE_OPTS) -C $(@D)
> +endef
> +
> +define HOST_ABOOTIMG_INSTALL_CMDS
> +	$(INSTALL) -m 0755 $(@D)/abootimg $(HOST_DIR)/usr/bin/abootimg
> +endef
> +
>  $(eval $(generic-package))
> +$(eval $(host-generic-package))

Otherwise, looks good!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com