Don't set LD_PRELOAD to ''. It doesn't work on OpenBSD.

Patch by Brad Smith.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225890 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/lit/lit/TestingConfig.py b/utils/lit/lit/TestingConfig.py
index 52cebbf6a418cef4d7d3aa2335d9e7af67930de8..c7ef94dc11fa91d512c0bc0c4b78c124859f7f1d 100644 (file)
--- a/utils/lit/lit/TestingConfig.py
+++ b/utils/lit/lit/TestingConfig.py
@@ -26,7 +26,11 @@ class TestingConfig:
                      'LD_PRELOAD', 'ASAN_OPTIONS', 'UBSAN_OPTIONS',
                      'LSAN_OPTIONS']
         for var in pass_vars:
-            environment[var] = os.environ.get(var, '')
+            val = os.environ.get(var, '')
+            # Check for empty string as some variables such as LD_PRELOAD cannot be empty
+            # ('') for OS's such as OpenBSD.
+            if val:
+                environment[var] = val
 
         if sys.platform == 'win32':
             environment.update({