On 06/16/20 21:35, J. Roeleveld wrote:
On 16 June 2020 20:31:56 CEST, n952162 <n952...@web.de> wrote:
Admonished to get everything updated, I turned to my raspberry pi with
Sakaki's binary image.  Synced and updated portage with no problem.
Then I did an emerge -u @world and got (after *hours* of dependency
checking):

Jobs: 0 of 206 complete, 1 running Load avg: 2.84, 3.44, 3.85
Emerging binary (1 of 206) sys-libs/glibc-2.31-r5::gentoo
Jobs: 0 of 206 complete, 1 running Load avg: 2.84, 3.44, 3.85
Jobs: 0 of 206 complete Load avg: 3.60, 3.54, 3.87
Installing (1 of 206) sys-libs/glibc-2.31-r5::gentoo
Jobs: 0 of 206 complete Load avg: 3.60, 3.54, 3.87
Exception in callback AsynchronousTask._exit_listener_cb(<bound
method...0x7f9180d9d8>>)
handle: <Handle AsynchronousTask._exit_listener_cb(<bound
method...0x7f9180d9d8>>)>
Traceback (most recent call last):
   File "/usr/lib64/python3.6/asyncio/events.py", line 145, in _run
     self._callback(*self._args)
   File
"/usr/lib64/python3.6/site-packages/_emerge/AsynchronousTask.py", line
201, in _exit_listener_cb
     listener(self)
   File
"/usr/lib64/python3.6/site-packages/_emerge/BinpkgPrefetcher.py", line
31, in _fetcher_exit
     self._start_task(verifier, self._verifier_exit)
   File "/usr/lib64/python3.6/site-packages/_emerge/CompositeTask.py",
line 113, in _start_task
     task.start()
   File
"/usr/lib64/python3.6/site-packages/_emerge/AsynchronousTask.py", line
30, in start
     self._start()
   File "/usr/lib64/python3.6/site-packages/_emerge/BinpkgVerifier.py",
line 59, in _start
     self._digester_exit)
   File "/usr/lib64/python3.6/site-packages/_emerge/CompositeTask.py",
line 113, in _start_task
     task.start()
   File
"/usr/lib64/python3.6/site-packages/_emerge/AsynchronousTask.py", line
30, in start
     self._start()
   File
"/usr/lib64/python3.6/site-packages/portage/util/_async/FileDigester.py",
line 30, in _start
     ForkProcess._start(self)
   File "/usr/lib64/python3.6/site-packages/_emerge/SpawnProcess.py",
line 112, in _start
     retval = self._spawn(self.args, **kwargs)
   File
"/usr/lib64/python3.6/site-packages/portage/util/_async/ForkProcess.py",
line 24, in _spawn
     pid = os.fork()
   File "/usr/lib64/python3.6/site-packages/portage/__init__.py", line
246, in __call__
     rval = self._func(*wrapped_args, **wrapped_kwargs)
OSError: [Errno 12] Cannot allocate memory

What's the recommended course of action here?

Log attached.
Suggestion:
1) ensure you only have 1 job running and absolutely no parallel builds. "--jobs 
1" for both emerge and make

2) get SWAP, preferably on USB stick/harddrive so as not to kill the SD card.

Because rasppis are low on memory and they have very specific uses, I tend not 
to bother with Gentoo on them.

--
Joost

I started getting a harddisk ready for a swap area, but then decided to
try to emerge @system as a first step (using the -j 1 option this time -
thank you) and that completed, as did then the subsequent emerge of @world.

It completed successfully (as I interpret it) with only 1 package being
emerged, but it also output these messages:

        WARNING: One or more updates/rebuilds have been skipped due to
   a dependency conflict:

        xfce-base/libxfce4ui:0


        !!! The following binary packages have been ignored due to non
   matching USE:

            =sys-devel/clang-9.0.1 python_single_target_python3_6
   -python_single_target_python3_7
            =sys-devel/clang-8.0.1 python_targets_python2_7


        !!! The following binary packages have been ignored due to
   changed dependencies:

             mail-mta/ssmtp-2.64-r3::gentoo
             sys-devel/llvm-9.0.1::gentoo
             sys-devel/llvm-8.0.1::gentoo


  Unclear to me is:

 *    why the dependency conflict for xfce-base/libxfce4ui did not
   prevent the emerge when dependency conflicts seem to normally do so.
 *    why the non-matching USE flags didn't cause, this time, the
   emerge to break
 *    What the difference is between:
     o      - the WARNING above
     o      - the two !!!  events
     o      - terminating errors in general




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