[OE-core] [PATCH v2 1/5] image: add image-combined-dbg helper class

[Richard Purdie]

On Tue, 2018-04-03 at 10:23 -0700, Victor Kamensky wrote:
> There is IMAGE_GEN_DEBUGFS="1" variable that enables build of
> additional rootfs-dbg and additional archive that contains
> complimentary symbols files for a given image. But the issue
> with this resulting directory and tarball that before use it
> has to be combined with original image content. It is required
> since all cross debugging tools like gdb, perf, and systemtap
> need file system that contains both target executables/libraries
> and their symbols. Those tools need to find executable/library
> first and through it debuglink note find corresponding symbols
> file.
> 
> image-combined-dbg when added to USER_CLASSES just copies
> final resulting rootfs back into rootfs-dbg creating combined
> target and debug symbols rootfs that can be used for debugging
> directly.
> 
> Signed-off-by: Victor Kamensky <kamensky at cisco.com>
> ---
>  meta/classes/image-combined-dbg.bbclass | 9 +++++++++
>  meta/classes/image.bbclass              | 1 +
>  2 files changed, 10 insertions(+)
>  create mode 100644 meta/classes/image-combined-dbg.bbclass
> 
> diff --git a/meta/classes/image-combined-dbg.bbclass
> b/meta/classes/image-combined-dbg.bbclass
> new file mode 100644
> index 0000000..a709adf
> --- /dev/null
> +++ b/meta/classes/image-combined-dbg.bbclass
> @@ -0,0 +1,9 @@
> +IMAGE_PREPROCESS_COMMAND_append = " combine_dbg_image; "
> +
> +combine_dbg_image () {
> +        if [ "$IMAGE_GEN_DEBUGFS" = "1" -a -e ${IMAGE_ROOTFS}-dbg ];

Can you not just use ${IMAGE_GEN_DEBUGFS} and drop the export?

Cheers,

Richard