学步园

这个是自己写的一个测试用例：

目录树：

CMakeLists.txt

build/

include/

    |__say.h

lib

   |__say.c 

   |__CMakeLists.txt

src

   |__CMakeLists.txt

   |__hello.c

 具体代码：

./CMakeLists.txt

project(h)
add_subdirectory(src)
add_subdirectory(lib)

./bin/CMakeList.txt

include_directories(../include)
add_library(sayhello say.c)

./src/CMakeList.txt

include_directory(../include)
add_executable(hello hello.c)
target_link_libraries(hello sayhello)

到build下，