[oe] issue with -Wno-unknown-warning

[robert.berger.oe.devel]

Hi Richard,

Sorry for coming back after such a long time, but I am pretty busy;)

Anyhow, I tried what you suggested in some off-list e-mail:

 >> 1.2) You need 2 patches [2][3]
 >>
 >> [2] 
https://github.com/RobertBerger/meta-java/commit/898a0ae33c9102387aae2e3427a007e3935e663e
 >
 > That's basically fine, but in case of icedtea7-native this restricts the
 > host compilers to >= gcc9. Therefore you should also add
 > "-Wno-unknown-warning".
 >
 > Furthermore please remove the "old" line instead of adding it as a 
comment.

Here is what I did as per your suggestion:

https://github.com/RobertBerger/meta-java/commit/3d8ae5afb639ec7abcc48f15c74b42b373863c57

 >
 >
 >>
 >> [3] 
https://github.com/RobertBerger/meta-java/commit/213b40c25602d23d00366149a778d2e53779b018
 >
 > Looks good.


... but it does not build:

https://pastebin.com/B1nxHcPH

cc1plus: error: unrecognized command line option ‘-Wno-unknown-warning’ 
[-Werror]

That's my host gcc:

pokyuser at 3a469e7032d9:/workdir$ gcc --version
gcc (Ubuntu 9.2.1-17ubuntu1~16.04) 9.2.1 20191102
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

pokyuser at 3a469e7032d9:/workdir$

Please advise.

Regards,

Robert