Re: [spurious parallel build bug] make -j fails with: "mv: mv: cannot stat `perl.mak': No such file or directory"

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Ingo Molnar <mingo@xxxxxxx> writes:

> I got this when i built v1.6.3-rc3 for the first time:
>
> $ make -j
> [...]
>     CC builtin-annotate.o
>     CC builtin-apply.o
>     CC builtin-archive.o
>     CC builtin-bisect--helper.o
> mv: mv: cannot stat `perl.mak': No such file or directory
> mv: cannot stat `perl.mak': No such file or directory
>     CC builtin-blame.o
> mv: cannot stat `perl.mak': No such file or directory
> mv: cannot stat `perl.mak': No such file or directory
> cannot stat `perl.mak': No such file or directory
>
> a plain 'make' worked.
>
> Interestingly, a second attempt to reproduce it after a 'make clean' 
> failed to trigger the bug. So it's either timing sensitive or 
> there's some other weirdness that caused this.

I've seen this a few times on the master machine at k.org but haven't seen
it elsewhere, perhaps because I do not have an access to 8-way parallelism
anywhere else.
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