[patch] libstdc++/67173 Fix filesystem::canonical for Solaris 10.

Martin Sebor msebor@gmail.com
Fri Sep 11 18:05:00 GMT 2015

On 09/11/2015 08:21 AM, Jonathan Wakely wrote:
> Solaris 10 doesn't follow POSIX in accepting a null pointer as the
> second argument to realpath(), so allocate a buffer for it.

FWIW, the NULL requirement is new in Issue 7. In Issue 6, the behavior
is implementation-defined, and before then it was an error. Solaris 10
claims conformance to SUSv2 and its realpath fails with EINVAL.
Solaris 11 says it conforms to Issue 6 but according to the man page
its realpath already implements the Issue 7 requirement.

I suspect the same problem will come up on other systems so checking
the POSIX version might be better than testing for each OS.


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