Merged make build fix from core

CMakeLists.txt

@@ -141,7 +141,9 @@ if(CMAKE_COMPILER_IS_GNUCXX)
 	endif()
 	#
 	set(CMAKE_CXX_FLAGS "-Wall ${GCC_EXTRA_OPTIONS} -pedantic -Wno-long-long ${CMAKE_CXX_FLAGS}")
-	#
+
+	### Make specific
+	if(${CMAKE_BUILD_TOOL} STREQUAL make OR ${CMAKE_BUILD_TOOL} STREQUAL gmake)
 		add_custom_target(debuggable $(MAKE) clean
 			COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Debug ${CMAKE_SOURCE_DIR}
 			COMMENT "Adjusting settings for debug compilation"
@@ -150,6 +152,7 @@ if(CMAKE_COMPILER_IS_GNUCXX)
 			COMMAND ${CMAKE_COMMAND} -DCMAKE_BUILD_TYPE=Release ${CMAKE_SOURCE_DIR}
 			COMMENT "Adjusting settings for release compilation"
 			VERBATIM)
+	endif()
 endif()
 
 # Microsoft VisualC++ specialities