https://github.com/skaslev/gl3w proper CMake

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
project(gl3w)

include(FindPythonInterp)
if(PYTHONINTERP_FOUND)
    execute_process(COMMAND ${PYTHON_EXECUTABLE} gl3w_gen.py
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
endif(PYTHONINTERP_FOUND)

option(BUILD_SHARED_LIBS "Build shared instead of static library" OFF)
set(BUILD_DEFINES "" CACHE STRING "Build defines")

include_directories(${CMAKE_SOURCE_DIR}/include)

set(HEADERS include/GL/gl3w.h include/GL/glcorearb.h)
set(SOURCES ${HEADERS} src/gl3w.c)

if(DEFINED BUILD_DEFINES)
	add_definitions(${BUILD_DEFINES})
endif()

if(BUILD_SHARED_LIBS)
    add_library(gl3w SHARED ${SOURCES})
else()
    add_library(gl3w STATIC ${SOURCES})
endif()

install(TARGETS gl3w
    ARCHIVE DESTINATION ${CMAKE_INSTALL_PREFIX}/lib
    LIBRARY DESTINATION ${CMAKE_INSTALL_PREFIX}/lib
    RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin
)

install(FILES ${HEADERS} DESTINATION ${CMAKE_INSTALL_PREFIX}/include/GL)