1 files changed, 16 insertions, 0 deletions
diff --git a/Source/cmIfCommand.cxx b/Source/cmIfCommand.cxx
index 8faab58..cdcf79d 100644
--- a/Source/cmIfCommand.cxx
+++ b/Source/cmIfCommand.cxx
@@ -287,6 +287,22 @@ bool cmIfCommand::IsTrue(const std::vector<std::string> &args,
         IncrementArguments(newArgs,argP1,argP2);
         reducible = 1;
         }
+      // is the given path an absolute path ?
+      if (*arg == "IS_ABSOLUTE" && argP1  != newArgs.end())
+        {
+        if(cmSystemTools::FileIsFullPath((argP1)->c_str()))
+          {
+          *arg = "1";
+          }
+        else 
+          {
+          *arg = "0";
+          }
+        newArgs.erase(argP1);
+        argP1 = arg;
+        IncrementArguments(newArgs,argP1,argP2);
+        reducible = 1;
+        }
       // does a command exist
       if (*arg == "COMMAND" && argP1  != newArgs.end())
         {