commit ec4717bda81827af455efa04c367c168cf1f221c
author Nico Weber <nicolasweber@gmx.de> Mon Jun 18 18:50:35 2018 +0000
committer Nico Weber <nicolasweber@gmx.de> Mon Jun 18 18:50:35 2018 +0000
tree d0d67e045e70bd63caf5d81626858462363e1e38
parent 46ac88f786ba30c569c8ab179716d97e020ad2ad

Don't let test/Driver/no-canonical-prefixes.c form a symlink cycle the second time it runs.

The test makes %t.fake a symlink to %t.real by running `ln -sf %t.real
%t.fake`. If %t.fake already is a symlink to %t.real when this runs (e.g. if
the test has run before), then this effectively becomes `ln -sf %t.real %t.real`,
symlinking the directory to itself. At least on my mac, this leads to the
directory containing itself.

As fix, just remove %t.fake before creating the symlink. To clean up build dirs
on bots, also remove %t.real for a while.

https://reviews.llvm.org/D48224


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@334972 91177308-0d34-0410-b5e6-96231b3b80d8