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Re: very strange build failure in external/gpl3/gcc/lib/libstdc++-v3/include/bits

On Fri, 8 Oct 2021, Greg A. Woods wrote:

If two identical 'mv' commands run in the same directory (with no other
commands running there in between) then the second one is going to
report an ENOENT error.  Given these 'mv' commands are on the tail of a
command list that creates the source file, they have to run very nearly
in parallel in order to trigger the observed failure.

GCC comes with a move-if-change script to do just this kind of file-rename
juggling. Try using that in the rule instead of the home-brew commands...



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