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

RVP <[email protected]> Fri, 8 Oct 2021 19:44:02 +0000 (UTC)

Newsgroups	gmane.os.netbsd.current,gmane.os.netbsd.devel.toolchain
Message-ID	<[email protected]>

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...

/usr/src/external/gpl3/gcc/dist/move-if-change

-RVP