* Fixed pedantic compiler flags

pedantic.cmake

@@ -6,19 +6,45 @@ set ( __PEDANTIC_INCLUDED TRUE )
 Include (CheckCCompilerFlag)
 Include (CheckCXXCompilerFlag)
 
+Macro (__PEDANTIC_INVERT_WNO_FLAG VAR_IN VAR_OUT)
+    If (${VAR_IN} MATCHES "-Wno")
+        String (REPLACE "-Wno-" "-W" ${VAR_OUT} ${VAR_IN})
+    Else ()
+        Set (${VAR_OUT} ${VAR_IN})
+    EndIf ()
+EndMacro ()
+
+Macro (__PEDANTIC_MAKE_UNIQUE_NAME PREFIX FLAG OUTPUT)
+    String (REGEX REPLACE "[^0-9a-zA-Z]" "_" TMP_NAME ${FLAG})
+    String (SUBSTRING ${TMP_NAME} 1 -1 TMP_NAME)
+    String (TOUPPER ${TMP_NAME} TMP_NAME)
+    Set (TMP_NAME "${PREFIX}_${TMP_NAME}")
+    Set (${OUTPUT} ${TMP_NAME})
+EndMacro ()
+
 Macro (__PEDANTIC_CHECK_AND_ADD_C_FLAG FLAG)
-    CHECK_C_COMPILER_FLAG(${FLAG} TMP)
-    If (TMP)
+    __PEDANTIC_MAKE_UNIQUE_NAME("HAVE_C_FLAG" ${FLAG} FLAG_NAME)
+    __PEDANTIC_INVERT_WNO_FLAG(${FLAG} TEST_FLAG)
+    Set (OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+    Set (CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${TEST_FLAG} -Werror")
+    CHECK_CXX_COMPILER_FLAG(${TEST_FLAG} ${FLAG_NAME})
+    Set (CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+    If (FLAG_NAME)
         Set (PEDANTIC_C_FLAGS "${PEDANTIC_C_FLAGS} ${FLAG}")
     EndIf ( )
-EndMacro()
+EndMacro ()
 
 Macro (__PEDANTIC_CHECK_AND_ADD_CXX_FLAG FLAG)
-    CHECK_CXX_COMPILER_FLAG(${FLAG} TMP)
-    If (TMP)
+    __PEDANTIC_MAKE_UNIQUE_NAME("HAVE_CXX_FLAG" ${FLAG} FLAG_NAME)
+    __PEDANTIC_INVERT_WNO_FLAG(${FLAG} TEST_FLAG)
+    Set (OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
+    Set (CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${TEST_FLAG} -Werror")
+    CHECK_CXX_COMPILER_FLAG(${TEST_FLAG} ${FLAG_NAME})
+    Set (CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
+    If (FLAG_NAME)
         Set (PEDANTIC_CXX_FLAGS "${PEDANTIC_CXX_FLAGS} ${FLAG}")
     EndIf ( )
-EndMacro()
+EndMacro ( )
 
 Set (PEDANTIC_C_FLAGS "")
 Set (PEDANTIC_CXX_FLAGS "")
@@ -45,6 +71,7 @@ __PEDANTIC_CHECK_AND_ADD_C_FLAG(-Wold-style-definition)
 __PEDANTIC_CHECK_AND_ADD_C_FLAG(-Woverlength-strings)
 __PEDANTIC_CHECK_AND_ADD_C_FLAG(-Wshadow)
 __PEDANTIC_CHECK_AND_ADD_C_FLAG(-Wwrite-strings)
+__PEDANTIC_CHECK_AND_ADD_C_FLAG(-Wdocumentation)
 
 __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-ftemplate-depth=2000)
 __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-g)
@@ -66,4 +93,5 @@ __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wno-pragmas)
 __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wno-unknown-pragmas)
 __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Woverlength-strings)
 __PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wshadow)
-__PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wwrite-strings)
+__PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wwrite-strings)
+__PEDANTIC_CHECK_AND_ADD_CXX_FLAG(-Wdocumentation)