Bug 9281

Summary: Changing SDK_OS hits warnings unless you wipe tmp
Product: [Build System, Metadata & Runtime] OE-Core Reporter: Christopher Larson <kergoth>
Component: coreAssignee: Juro Bystricky <juro.bystricky>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: Medium+ CC: meta.mr.watcher, meta.watcher, sgw
Version: unspecified   
Target Milestone: 2.2 M4   
Hardware: x86   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: No (bug/feature does not impact docs)
Attachments:
Description Flags
patch for jethro/poky
none
patch for jethro/meta-mingw none

Description Christopher Larson 2016-03-16 23:34:02 UTC 
Only SDK_ARCH is captured in the PN of the crosssdk recipes, so changes to SDK_OS result in conflicts due to rebuilding them while providing the same thing. I think we should include all of SDK_SYS as the recipe name suffix instead, unless we don't want to support this use case. Specifically, changing from linux to mingw will hit this.
Comment 1 Ross Burton 2016-03-17 13:48:59 UTC 
Sounds about right.  Can you send a patch?
Comment 2 Juro Bystricky 2016-08-05 22:13:06 UTC 
To implement/test the changes, I initially used jethro version. meta-mingw layer needs several modifications for krogoth/master, which would complicate the design at an early stage.
I created two patches that allow me to execute:

$ bitbake meta-toolchain 

while changing SDKMACHINE in local.conf.

SDKMACHINE ?= "i686-mingw32"
SDKMACHINE ?= "x86_64-mingw32"
SDKMACHINE ?= "i686"
SDKMACHINE ?= "x86_64"

Without the patches, I would get several errors:
ERROR: The recipe binutils-crosssdk-i686 is trying to install files into a shared area....
...
The build has stopped as continuing in this scenario WILL break things, if not now, possibly in the future (we've seen builds fail several months later).
...
ERROR: Function failed: sstate_task_postfunc
...

Then I would be forced to delete the "tmp" folder.
The patches allow co-existance builds of various SDKMACHINES.

The next step is to actually test the generated SDKs (so far only a visual check) and move on to krogoth/master.
Comment 3 Juro Bystricky 2016-08-05 22:14:39 UTC 
Created attachment 3339 [details]
patch for jethro/poky

Patch for several poky files (jethro)
Comment 4 Juro Bystricky 2016-08-05 22:15:54 UTC 
Created attachment 3340 [details]
patch for jethro/meta-mingw

meta-mingw patch needed to avoid name-clash.
Comment 5 Juro Bystricky 2016-09-26 16:40:47 UTC 
Patchset sent to the mailing list:
http://lists.openembedded.org/pipermail/openembedded-core/2016-September/126945.html