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[Bug libstdc++/67066] libstdc++-v3/src/filesystem/dir.cc fails to compile with --enable-concept-checks


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67066

--- Comment #8 from Eric Gallager <egall at gwmail dot gwu.edu> ---
(In reply to Jonathan Wakely from comment #7)
> Fixed on trunk.
> 
> The filesystem library is now enabled on the gcc-5-branch too, but I'm not
> making this change there. Just don't use --enable-concept-checks in
> combination with the filesystem library (better yet, don't use
> --enable-concept-checks at all).

Thanks for the commit! One other place I'd document it, though, would be in
libstdc++'s ./configure --help output, which currently just says:

$ ./libstdc++-v3/configure --help | grep concept
  --enable-concept-checks use Boost-derived template checks [default=no]

I would attach a patch for libstdc++-v3/acinclude.m4, but I don't know if I'll
be able to stop myself from going and fixing all the under-quoted m4 macro
arguments while I'm at it for this one...


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