From ed216b32a507611a3f2f634ac8d3fc0f8e810ea7 Mon Sep 17 00:00:00 2001
From: Sebastian Holtermann <sebholt@xwmw.org>
Date: Fri, 1 Sep 2017 00:36:23 +0200
Subject: Autogen: Touch moc_predefs.h when it's content didn't change

---
 Source/cmQtAutoGenerators.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Source/cmQtAutoGenerators.cxx b/Source/cmQtAutoGenerators.cxx
index 71e51bd..d89c121 100644
--- a/Source/cmQtAutoGenerators.cxx
+++ b/Source/cmQtAutoGenerators.cxx
@@ -1227,6 +1227,7 @@ bool cmQtAutoGenerators::MocGenerateAll(
           return false;
         }
       }
+
       // (Re)write predefs file only on demand
       if (this->FileDiffers(this->MocPredefsFileAbs, output)) {
         if (this->FileWrite(cmQtAutoGen::MOC, this->MocPredefsFileAbs,
@@ -1235,6 +1236,12 @@ bool cmQtAutoGenerators::MocGenerateAll(
         } else {
           return false;
         }
+      } else {
+        // Touch to update the time stamp
+        if (this->Verbose) {
+          this->LogInfo("Touching MOC predefs " + this->MocPredefsFileRel);
+        }
+        cmSystemTools::Touch(this->MocPredefsFileAbs, false);
       }
     }
   }
-- 
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