Help/guide/tutorial/Step4/MathFunctions/CMakeLists.txt - third_party/github.com/Kitware/CMake - Git at Google

 add_library(MathFunctions mysqrt.cxx)

 # state that anybody linking to us needs to include the current source dir
 # to find MathFunctions.h, while we don't.
 target_include_directories(MathFunctions
           INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
           )
	add_library(MathFunctions mysqrt.cxx)

	# state that anybody linking to us needs to include the current source dir
	# to find MathFunctions.h, while we don't.
	target_include_directories(MathFunctions
	INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
	)