[libc++] Make sure we create the working directory for running config check commands

The internal Lit shell requires the current working directory to exist.
This didn't show up locally because the directories were already created
by previous runs of the tests.

diff --git a/libcxx/utils/libcxx/test/dsl.py b/libcxx/utils/libcxx/test/dsl.py
index 5f88bd7..523c5d9 100644 (file)
--- a/libcxx/utils/libcxx/test/dsl.py
+++ b/libcxx/utils/libcxx/test/dsl.py
@@ -34,8 +34,10 @@ def _executeScriptInternal(test, commands):
       self.maxIndividualTestTime = 0
   litConfig = FakeLitConfig()
   _, tmpBase = lit.TestRunner.getTempPaths(test)
-  execdir = os.path.dirname(test.getExecPath())
-  res = lit.TestRunner.executeScriptInternal(test, litConfig, tmpBase, commands, execdir)
+  execDir = os.path.dirname(test.getExecPath())
+  if not os.path.exists(execDir):
+    os.makedirs(execDir)
+  res = lit.TestRunner.executeScriptInternal(test, litConfig, tmpBase, commands, execDir)
   if isinstance(res, lit.Test.Result):
     res = ('', '', 127, None)
   return res
@@ -110,7 +112,7 @@ def compilerMacros(config, flags=''):
     commands = libcxx.test.newformat.parseScript(test, preamble=commands, fileDependencies=[])
     unparsedOutput, err, exitCode, timeoutInfo = _executeScriptInternal(test, commands)
     parsedMacros = dict()
-    defines = (l.strip() for l in unparsedOutput.split('\n') if l.startswith('#define'))
+    defines = (l.strip() for l in unparsedOutput.split('\n') if l.startswith('#define '))
     for line in defines:
       line = line[len('#define '):]
       macro, _, value = line.partition(' ')