环境变量 CMAKE_INCLUDE_PATH 和 CMAKE_LIBRARY_PATH
在bash中使用export设置上面2个环境变量
export CMAKE_INCLUDE_PATH=/home/tom/workspace/study/cmake/practice/t4/build/install/include/hello
export CMAKE_LIBRARY_PATH=/home/tom/workspace/study/cmake/practice/t4/build/install/lib
结合： FIND_PATH,FIND_LIBRARY一起使用
CMAKE_MINIMUM_REQUIRED(VERSION 3.1 FATAL_ERROR)
ADD_EXECUTABLE(main main.c)
FIND_PATH(myHeader hello.h)
INCLUDE_DIRECTORIES(${myHeader})
FIND_LIBRARY(HELLO_LIBRARY libhello.so)
TARGET_LINK_LIBRARIES(main ${HELLO_LIBRARY})