1 files changed, 5 insertions, 1 deletions
diff --git a/run.py b/run.py
index 59d5b00..4fc366e 100755
--- a/run.py
+++ b/run.py
@@ -86,7 +86,11 @@ def main():
 
     os.environ["shader_precompile"] = "true"
     os.environ["allow_glsl_extension_directive_midshader"] = "true"
-    os.environ["INTEL_DEBUG"] = "vs,gs,fs"
+    if "INTEL_DEBUG" in os.environ:
+        print("Warning: INTEL_DEBUG environment variable set!", file=sys.stderr)
+        os.environ["INTEL_DEBUG"] += ",vs,gs,fs"
+    else:
+        os.environ["INTEL_DEBUG"] = "vs,gs,fs"
 
     try:
         os.stat("bin/glslparsertest")