xsctbase.bbclass: Run xsct in the background

[dawithers]

Add export DISPLAY=:0 before evaluation of xsct in order to run xsct in the background and prevent xserver errors that may go unnoticed during certain tasks and cause issues further down the line.

[mharth]

Can you provide more details on why you need to set to DISPLAY =:0, what errors did you observe ?

[mnsgs]

It looks to be the fix/workaround Manju proposed three months ago to the issue I raised towards the mailing list: https://lists.yoctoproject.org/pipermail/meta-xilinx/2017-September/003162.html . I am puzzled a proper fix is not yet provided - it is a pain for us to maintain fixes downstream and I thus hope it will soon be fixed upstream (as in this particular project).

Thanks, Martin

[mharth]

See https://lists.yoctoproject.org/pipermail/meta-xilinx/2018-January/003541.html This patch should resolve the issue

[mharth]

https://github.com/Xilinx/meta-xilinx-tools/commit/ad0ce7496f2a2330230e99c33670e22106cd9997

Newer xsct (2018.1) can be done little differently on rocko release using HOSTTOOLS https://github.com/Xilinx/meta-xilinx-tools/commit/65ee3acd1e3e5a79c8ab8ce5dec765c5fbb69875