diff --git a/compiler-rt/test/lit.common.cfg b/compiler-rt/test/lit.common.cfg
--- a/compiler-rt/test/lit.common.cfg
+++ b/compiler-rt/test/lit.common.cfg
@@ -389,7 +389,8 @@
       stdout = subprocess.PIPE,
       env=config.environment)
 except OSError:
-  print("Could not find llvm-config in " + config.llvm_tools_dir)
+  print("Could not launch llvm-config in " + config.llvm_tools_dir)
+  print("    Failed with error #{0}: {1}".format(e.errno, e.strerror))
   exit(42)
 
 if re.search(r'ON', llvm_config_cmd.stdout.read().decode('ascii')):