[yocto] mono-native is trying to install files into a shared area...

[Craig McQueen]

Lately, I'm trying to upgrade to a later version of mono, 5.4.1.6. When I try to do a build of my Yocto image, bitbake gets to the end of building mono-native, and then gets an error:


ERROR: mono-native-5.4.1.6-r0 do_populate_sysroot: The recipe mono-native is trying to install files into a shared area when those files already exist. Those files and their manifest location are:
   /home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/lib/mono/lldb/mono.py
 Matched in b''
 /home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/lib/mono/4.6.1-api/System.Web.Http.SelfHost.dll
 Matched in b''
...
/home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/lib/mono/xbuild/14.0/bin/MSBuild/Microsoft.Build.CommonTypes.xsd
 Matched in b''
 /home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/lib/mono/xbuild/14.0/bin/MSBuild/Microsoft.Build.Core.xsd
 Matched in b''
 /home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/lib/mono/xbuild/14.0/Microsoft.Common.targets/ImportAfter/Microsoft.NuGet.ImportAfter.targets
 Matched in b''
Please verify which recipe should provide the above files.
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). If the system knew how to recover from this automatically it would however there are several different scenarios which can result in this and we don't know which one this is. It may be you have switched providers of something like virtual/kernel (e.g. from linux-yocto to linux-yocto-dev), in that case you need to execute the clean task for both recipes and it will resolve this error. It may be you changed DISTRO_FEATURES from systemd to udev or vice versa. Cleaning those recipes should again resolve this error however switching DISTRO_FEATURES on an existing build directory is not supported, you should really clean out tmp and rebuild (reusing sstate should be safe). It could be the overlapping files detected are harmless in which case adding them to SSTATE_DUPWHITELIST may be the correct solution. It could also be your build is including two different conflicting versions of things (e.g. bluez 4 and bluez 5 and the correct solution for that would be to resolve the conflict. If in doubt, please ask on the mailing list, sharing the error and filelist above.
ERROR: mono-native-5.4.1.6-r0 do_populate_sysroot: If the above message is too much, the simpler version is you're advised to wipe out tmp and rebuild (reusing sstate is fine). That will likely fix things in most (but not all) cases.
ERROR: mono-native-5.4.1.6-r0 do_populate_sysroot: Function failed: sstate_task_postfunc
ERROR: Logfile of failure stored in: /home/craigm/yocto/poky/build/tmp/work/x86_64-linux/mono-native/5.4.1.6-r0/temp/log.do_populate_sysroot.108358
ERROR: Task (/home/craigm/yocto/poky/build/../../meta-mono/recipes-mono/mono/mono-native_5.4.1.6.bb:do_populate_sysroot) failed with exit code '1'
NOTE: Tasks Summary: Attempted 670 tasks of which 662 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
  /home/craigm/yocto/poky/build/../../meta-mono/recipes-mono/mono/mono-native_5.4.1.6.bb:do_populate_sysroot
Summary: There were 3 ERROR messages shown, returning a non-zero exit code.


I'm building with Yocto poky morty branch (currently commit 0e730770a9), meta-mono master (commit dced6635ca). I'm building on Ubuntu 16.04.4.

I have tried deleting the tmp directory, deleting all mono and mono-native from sstate, cleaning mono and meta-mono, etc, to no avail.

It's puzzling why I'm getting these errors, because it says "Matched in b''", so the files are not clashing with another recipe. It seems to be somehow trying to install its own files twice, or something like that. If I look under tmp/work/x86_64-linux/mono-native/5.4.1.6-r0/, then I see the files present in both:

sysroot-destdir/home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/ and 
image/home/craigm/yocto/poky/build/tmp/sysroots/x86_64-linux/

Is that part of the problem?

-- 
Craig McQueen