Some small improvements

cmake/FindGTest.cmake

@@ -31,7 +31,7 @@ If( CMAKE_CROSSCOMPILING )
 EndIf ( )
 
 If( GTest_FOUND )
-    Message ( FATAL_ERROR "GTest already found! Do not expect that an other CMake script looked for 'GTest'. " )
+    Return ()
 EndIf ( )
 
 # Configure external project

cmake/git_helper.cmake

@@ -29,18 +29,29 @@ Function ( GitGetVersion GIT_ROOT OUT_MAJOR OUT_MINOR OUT_PATCH OUT_BUILD OUT_HA
         Message ( FATAL_ERROR "${GIT_ROOT} is not a git directory" )
     EndIf ( )
 
-    # Find the latest git tag
-    GitExecute ( "${GIT_ROOT}" "git describe --tags --abbrev=1 --match v[0-9].[0-9]* HEAD" False TAG SUCCESS )
+    # Hash
+    GitExecute ( "${GIT_ROOT}" "git rev-parse HEAD" True HASH SUCCESS )
     If ( NOT ${SUCCESS} )
         Return ( )
     EndIf ( )
 
+    String ( STRIP "${HASH}" HASH )
+    Set ( ${OUT_HASH} ${HASH} PARENT_SCOPE )
+
+    # Dirty
     GitExecute ( "${GIT_ROOT}" "git status -s -uall" True DIRTY SUCCESS )
     If ( NOT ${SUCCESS} )
         Return ( )
     EndIf ( )
 
-    GitExecute ( "${GIT_ROOT}" "git rev-parse HEAD" True HASH SUCCESS )
+    If ( DIRTY )
+        Set ( ${OUT_DIRTY} 1 PARENT_SCOPE )
+    Else ( )
+        Set ( ${OUT_DIRTY} 0 PARENT_SCOPE )
+    EndIf ( )
+
+    # Version
+    GitExecute ( "${GIT_ROOT}" "git describe --tags --abbrev=1 --match v[0-9].[0-9]* HEAD" False TAG SUCCESS )
     If ( NOT ${SUCCESS} )
         Return ( )
     EndIf ( )
@@ -87,20 +98,9 @@ Function ( GitGetVersion GIT_ROOT OUT_MAJOR OUT_MINOR OUT_PATCH OUT_BUILD OUT_HA
         Set ( ${OUT_BUILD} ${TMP} PARENT_SCOPE )
     EndIf ( )
 
-    # hash
-    String ( STRIP "${HASH}" HASH )
-    Set ( ${OUT_HASH} ${HASH} PARENT_SCOPE )
-
     # behind
     Set ( ${OUT_BEHIND} ${BEHIND} PARENT_SCOPE )
 
-    # dirty
-    If ( DIRTY )
-        Set ( ${OUT_DIRTY} 1 PARENT_SCOPE )
-    Else ( )
-        Set ( ${OUT_DIRTY} 0 PARENT_SCOPE )
-    EndIf ( )
-
 EndFunction ( )
 
 # Get the git hash og the current commit