[yocto] Whitelist gdbserver

[Jeremy Overesch]

HI all,

I'm attempting to whitelist gdbserver just for SDK purposes, while keeping all other GPLv3 code as incompatible (therefore unbuilt).  However, everything I've tried still results in gdbserver being removed from my SDK and therefore failing to build.

In my local.conf, I have the following line:

INCOMPATIBLE_LICENSE = "GPLv3 LGPLv3 AGPLv3"

Through the yocto documentation (https://www.yoctoproject.org/docs/2.4/mega-manual/mega-manual.html#license-flag-matching), it appears that adding the following *should* work, yet it doesn't:

LICENSE_FLAGS_WHITELIST = "GPLv3_gdbserver"

I've also tried the following lines individually:
LICENSE_FLAGS_WHITELIST = "GPLv3_gdbserver LGPLv3_gdbserver"
INCOMPATIBLE_LICENSE_gdbserver = ""

But none of these seem to work.

When I build, I get the following:
---- snip ----
vagrant at buildPC:~/newroot/build$ bitbake -c populate_sdk thing4-fullImage
WARNING: Host distribution "Ubuntu-16.04" has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution.
NOTE: /home/vagrant/newroot/sources/poky/meta/recipes-extended/libidn/libidn_0.6.14.bb: INCLUDING libidn as buildable despite INCOMPATIBLE_LICENSE because it has been whitelisted
NOTE: /home/vagrant/newroot/sources/poky/meta/recipes-extended/libidn/libidn_1.32.bb: INCLUDING libidn as buildable despite INCOMPATIBLE_LICENSE because it has been whitelisted
Parsing recipes: 100% |########################################################################################| Time: 00:00:12
Parsing of 2143 .bb files complete (0 cached, 2143 parsed). 2714 targets, 582 skipped, 1 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies
ERROR: Nothing RPROVIDES 'gdbserver' (but /home/vagrant/newroot/sources/poky/../meta-qt5/recipes-qt/packagegroups/packagegroup-qt5-qtcreator-debug.bb RDEPENDS on or otherwise requires it)
NOTE: Runtime target 'gdbserver' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['gdbserver']
NOTE: Runtime target 'packagegroup-qt5-qtcreator-debug' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['packagegroup-qt5-qtcreator-debug', 'gdbserver']
ERROR: Required build target 'thing4-fullImage' has no buildable providers.
Missing or unbuildable dependency chain was: ['thing4-fullImage', 'packagegroup-qt5-qtcreator-debug', 'gdbserver']

Summary: There was 1 WARNING message shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.
---- snip ----

Is there a way to figure out what magic line I need?

Thanks in advance for any help you can give.

-Jeremy

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