Added a simple cmake script users can use to simplify their own CMakeLists.txt scripts

dlib/cmake

@@ -0,0 +1,20 @@
+
+
+# Determine the path to dlib.
+string(REPLACE "cmake" "" dlib_path ${CMAKE_CURRENT_LIST_FILE})
+
+if (CMAKE_COMPILER_IS_GNUCXX)
+   # By default, g++ won't warn or error if you forget to return a value in a
+   # function which requires you to do so.  This option makes it give a warning
+   # for doing this. 
+   add_definitions("-Wreturn-type")
+endif()
+
+# Add folder containing dlib to the include search path.
+INCLUDE_DIRECTORIES(${dlib_path}/..)
+
+# This is really optional, but nice.  It will make sure the build mode 
+# created by cmake is always release by default.
+include(${dlib_path}/release_build_by_default)
+
+add_subdirectory(${dlib_path} dlib_build)

tools/imglab/CMakeLists.txt

@@ -27,23 +27,12 @@ ADD_EXECUTABLE(${target_name}
 )
 
 
-
-# add the folder containing the dlib folder to the include path
-INCLUDE_DIRECTORIES(../..)
-
-# There is a CMakeLists.txt file in the dlib source folder that tells cmake
-# how to build the dlib library.  Tell cmake about that file.
-add_subdirectory(../../dlib dlib_build)
-
-# Tell cmake to link our target executable to the non-gui version of the dlib
-# library.  
+# Tell cmake to link our target executable dlib.  
+include(../../dlib/cmake)
 TARGET_LINK_LIBRARIES(${target_name} dlib )
 
 
-
 INSTALL(TARGETS ${target_name}
 	RUNTIME DESTINATION bin
 	)
 
-#set default build type to Release
-include(../../dlib/release_build_by_default)