commit ab883e8c3b9fb281e5fe064784951c5addd5d11c
author Louis Dionne <ldionne@apple.com> Wed Nov 21 23:00:45 2018 +0000
committer Louis Dionne <ldionne@apple.com> Wed Nov 21 23:00:45 2018 +0000
tree f2ba99a8431179ba0c933acd3bd35d3c1d7fc88e
parent d898f74a785491dc9aa537f918a030e02f0ddc70

[libcxx] Improve error message when an invalid directory is provided as use_system_cxx_lib

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@347435 91177308-0d34-0410-b5e6-96231b3b80d8

utils/libcxx/test/config.py

diff --git a/utils/libcxx/test/config.py b/utils/libcxx/test/config.py
index 7467511..abd4b76 100644
--- a/utils/libcxx/test/config.py
+++ b/utils/libcxx/test/config.py
@@ -307,7 +307,7 @@
         elif self.use_system_cxx_lib == 'false':
             self.use_system_cxx_lib = False
         elif self.use_system_cxx_lib:
-            assert os.path.isdir(self.use_system_cxx_lib)
+            assert os.path.isdir(self.use_system_cxx_lib), "the specified use_system_cxx_lib parameter (%s) is not a valid directory" % self.use_system_cxx_lib
         self.lit_config.note(
             "inferred use_system_cxx_lib as: %r" % self.use_system_cxx_lib)