Brad King 85a945a607 Restore handling of build directory inside a symlinked path ...

In commit dd8365b3f1 (Merge branch 'upstream-KWSys' into update-kwsys,
2020-04-06, v3.18.0-rc1~397^2) we imported KWSys commit `019afb6ea`
(SystemTools: Drop GetCurrentWorkingDirectory 'collapse' argument,
2020-04-03).  That caused `GetCurrentWorkingDirectory` to no longer send
paths through the KWSys translation map and broke CMake's detection of
the absolute path to a build directory containing a symbolic link.
Add our own `cmSystemTools::GetCurrentWorkingDirectory` wrapper around
the KWSys method in order to restore that mapping.

Test-case-by: Ben Boeckel <ben.boeckel@kitware.com>
Issue: #16228
Fixes: #20900

2020-07-02 07:33:16 -04:00

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