[PATCH] Backport all Filesystem library fixes from trunk

[Jonathan Wakely]

On 12/12/16 14:09 +0000, Jonathan Wakely wrote:
>This syncs the std::experimental::filesystem code on gcc-6-branch to
>match what's on trunk, except that the C++17 std::string_view type
>doesn't exist on the branch, so the filesystem::path type only
>supports experimental::string_view.
>
>I'm doing it as one big patch, rather than backporting 26 individual
>patches.

[snip]

>Tested x86_64-linux, committed to gcc-6-branch.
>
>I'll backport most of this to gcc-5-branch too, I think the gcc-6
>patch should apply cleanly, but I'll need to adjust the tests to not
>use { dg-do action { target c++11 } } as that's only on trunk and
>gcc-6-branch.

I missed these two fixes for the configure tests for Filesystem.

Committed to gcc-6-branch, will commit to 5 once testing completes.

Somehow I managed to commit a load of duplicate ChangeLog entries in
the commits from r243569 to r243574. Git-svn went crazy. I've cleaned
that up now.


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