BUG: File installation should overwrite the destination if the file times differ at all rather than only if the source file is newer. Users expect installation to overwrite destination files. This addresses the re-opening of bug#3349.

Source/cmFileCommand.cxx

@@ -949,11 +949,8 @@ bool cmFileInstaller::InstallFile(const char* fromFile, const char* toFile,
   bool copy = true;
   if(!always)
     {
-    // If both files exist and "fromFile" is not newer than "toFile"
-    // do not copy.
-    int timeResult;
-    if(this->FileTimes.FileTimeCompare(fromFile, toFile, &timeResult) &&
-       timeResult <= 0)
+    // If both files exist with the same time do not copy.
+    if(!this->FileTimes.FileTimesDiffer(fromFile, toFile))
       {
       copy = false;
       }