[PATCH] libstdc++/78111 fix fallback code for filesystem::canonical

Jonathan Wakely jwakely@redhat.com
Wed Oct 26 11:29:00 GMT 2016

The configure test for realpath() is missing a header, and the
fallback version of filesystem::canonical() that gets used if
realpath() fails was not setting an error.

Tested powerpc64le-linux, committed to trunk.

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