[Yocto] jethro meta-intel-msdk failed to unpack rpm files

[TurtleCrazy]

Dear all,

I m in charge of building a Linux image that will ship the intel-msdk, with the help of Yocto.

Dealing with the official "yocto" layer, I followed the steps described in
https://software.intel.com/en-us/blogs/2017/03/13/media-sdk-for-embedded-linux-launch

But Bitbake failed to install the msdk-media driver on the following error:

ERROR: Function failed: do_install (log file is located at /home/jethro/tmp/work/corei7-64-poky-linux/msdk-media/16.7.3-r0/temp/log.do_install.19186)
ERROR: Logfile of failure stored in: /home/jethro/tmp/work/corei7-64-poky-linux/msdk-media/16.7.3-r0/temp/log.do_install.19186
Log data follows:
| DEBUG: Executing shell function do_install
| cp: cannot stat '/home/jethro/tmp/work/corei7-64-poky-linux/msdk-media/16.7.3-r0/etc': No such file or directory
| WARNING: exit code 1 from a shell command.
| ERROR: Function failed: do_install (log file is located at /home/jethro/tmp/work/corei7-64-poky-linux/msdk-media/16.7.3-r0/temp/log.do_install.19186)
ERROR: Task 2 (/home/jade/users/marec/poky-jethro/meta-intel-msdk/recipes-graphics/msdk-media/msdk-media_16.7.3.bb, do_install) failed with exit code '1'
NOTE: Tasks Summary: Attempted 1637 tasks of which 1636 didn't need to be rerun and 1 failed.
No currently running tasks (1383 of 1704)

moreover, the built package for the msdk itself is empty.

This is related to the way SRC_URI is defined, i.e. as "rpm" files.

SRC_URI = "file://files/intel-linux-media-${PV}*.rpm;subdir=${BP};name=msdk-rpm"


SRC_URI = "file://files/intel-linux-mediasdk-${PV}-*.rpm;subdir=${BP};name=msdk-rpm \
           file://files/intel-linux-mediasdk-devel-${PV}-*.rpm;subdir=${BP};name=msdk-rpm"

I m not a yocto expert but this is not the usual way of fetching and unpacking files from a yocto recipe.
If I am not mistaken, basically the "rpm" file is just copied to the root directory of the package ( ${WORKDIR} ).
That means that "rpm" is not called in any way and no further action will be triggered to unpack the files contents.
So the "do_install" action has no file to copy to the destination folder and failed.

How to use the yocto intel-msdk-layer correctly ?

thanks.