SDL+花栗鼠CMake配置

Question

我想通过CMake将花栗鼠2D物理框架与SDL链接起来。

我有以下项目结构：

MyProject
-chipmunk:
--include
--demo:
---CMakeList.txt
--src:
---CMakeList.txt
--CMakeList.txt
-src:
--main.cpp
-CMakeLists.txt

我读过关于静态和共享库的文章，决定使用静态库，所以我进入花栗鼠文件夹，运行cmake

1.第一个CMakeList文件设置选项：

message(STATUS "Set BUILD_STATIC option ON")
option(BUILD_SHARED "Build and install the shared library" ON)
option(BUILD_STATIC "Build as static library" ON)
option(INSTALL_STATIC "Install the static library" ON)

之后：

add_subdirectory(src)

2. src中的CMakeList.txt进入操作：

   
   if(BUILD_STATIC)
   message(STATUS "BUILDING chipmunk_static")
   add_library(chipmunk_static STATIC ${chipmunk_source_files})
   set_target_properties(chipmunk_static PROPERTIES OUTPUT_NAME chipmunk)
   if(INSTALL_STATIC)
   message(STATUS "INSTALL chipmunk_static ${LIB_INSTALL_DIR}")
   install(TARGETS chipmunk_static ARCHIVE DESTINATION {LIB_INSTALL_DIR})
   endif(INSTALL_STATIC)
   endif(BUILD_STATIC)
   

3. In the demo folder the CmakeFile does the follows:

   
   set(chipmunk_demos_libraries
   chipmunk_static
   ${GLEW_LIBRARIES}
   ${OPENGL_LIBRARIES}
   )
   

S0 my questions are:

1. Do I need to run the Makefiles from the chipmunk libraries only once so I can build the static library?
2. After I included the CMakefile from chipmunk in my Cmakefile it seems it cannot found the static library (I'm on Linux btw)
3. If I have the static library built, can I delete all the src content from chipmunk and keep only the headers?

My attempt to find the chipmunk static librarywithout success:

add_subdirectory(chipmunk)
find_package(SDL2 REQUIRED)
find_library(CHIPMUNK_LIB chipmunk_static)
message(${CHIPMUNK_LIB})

Answer 1

So with CMake, when you "find" a library it looks for an installed one, not one built by a sub-project. So somewhere you should have a line where you reference the directory that has Chipmunk in it. In my project:

add_subdirectory(external/Chipmunk2D)

然后，当您构建可执行文件(或库，不管怎样(时，您可以按名称列出子项目构建的库。在我的案例中，glfw、花栗鼠_静态和enet都是由CMake在子项目中构建的：

target_link_libraries(my_executable
${OPENGL_LIBRARIES}
glfw
chipmunk_static
enet
)