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src/Tools/Code/code_target.ML
changeset 63024 adeac19dd410
parent 62969 9f394a16c557
child 63157 65a81a4ef7f8 
--- a/src/Tools/Code/code_target.ML	Tue Apr 19 13:05:50 2016 +0200
+++ b/src/Tools/Code/code_target.ML	Mon Apr 18 20:56:11 2016 +0200
@@ -389,7 +389,7 @@
         else ()
       end;
   in
-    if getenv env_var = ""
+    if not (env_var = "") andalso getenv env_var = ""
     then if strict
       then error (env_var ^ " not set; cannot check code for " ^ target_name)
       else warning (env_var ^ " not set; skipped checking code for " ^ target_name)
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