CMake with include and source paths - basic setup

问题:

I'm trying to set up a test project looking like my own project just to get things working first and it looks like this:

/MainProject/inc/main.h
/MainProject/src/main.cpp
/LibProject/inc/test.h
/LibProject/src/test.cpp

I've found some tutorials, but I cant find out how to set up this when I have the inc and src folder? How would the CMakeLists.txt files look? Would I have one in /, one in each of the project folders? It seems like I dont need to have one in the inc and src folders?

回答1:

You need a CMakeLists.txt for each source subdirectory. Your structure should look something like this:

root
|-MainProject
| |-inc
| | '-main.h
| |-src
| | |-main.cpp
| | '-CMakeLists.txt
| '-CMakeLists.txt 
|-LibProject
| |-inc
| | '-test.h
| |-src
| | |-test.cpp
| | '-CMakeLists.txt
| '-CMakeLists.txt
'-CMakeLists.txt

Content of root/CMakeLists.txt:

project(MyProject)
add_subdirectory(MainProject)
add_subdirectory(LibProject)

Content of LibProject/CMakeLists.txt and MainProject/CMakeLists.txt:

add_subdirectory(src)

Content of LibProject/src/CMakeLists.txt:

# Notice name prefix of this variable, set by CMake according
# to value given with "project()" in the root CMakeLists.txt.
include_directories(${MyProject_SOURCE_DIR}/LibProject/inc)
add_library(LibProject test.cpp)

Content of MainProject/src/CMakeLists.txt:

include_directories(${MyProject_SOURCE_DIR}/MainProject/inc)
# I assume you want to use LibProject as a library in MainProject.
include_directories(${MyProject_SOURCE_DIR}/LibProject/inc)
link_directories(${MyProject_SOURCE_DIR}/LibProject/src)
add_executable(MainProject main.cpp)
target_link_libraries(MainProject LibProject)

Then configure and build with:

$ cd root
$ mkdir build
$ cd build
$ cmake ..
$ make

回答2:

You could do it like following.

• CMakeLists.txt in your MainProject directory:

  project(MainProject)
  
  add_subdirectory(LibProject/src)
  add_subdirectory(MainProject/src)
  

• CMakeLists.txt in your LibProject/src directory:

  include_directories(${PROJECT_SOURCE_DIR}/LibProject/inc/)
  add_library(LibProject test.cpp)
  

• CMakeLists.txt in your MainProject/src directory:

  include_directories(${PROJECT_SOURCE_DIR}/MainProject/inc/)
  add_executable(MainProject main.cpp)
  target_link_libraries(MainProject LibProject)
  

回答3:

In my case I wanted to do it with a single CMakeList. And it worked for me. I add my solution in case it serves to anyone.

This is what I did in my case:

My structure:
Project
|CMakeLists.txt
|-src
| |*.cpp
| |*.c
|-include
| |*.hpp
| |*.h

My CMakeLists.txt have to main parts:

include_directories(
        ${PROJECT_SOURCE_DIR}/include
        ${PROJECT_SOURCE_DIR}/src
)

^ Enables .cpp files to add headers in the include folder.

file(GLOB all_SRCS
        "${PROJECT_SOURCE_DIR}/include/*.h"
        "${PROJECT_SOURCE_DIR}/include/.hpp"
        "${PROJECT_SOURCE_DIR}/src/*.cpp"
        "${PROJECT_SOURCE_DIR}/src/*.c"
        )

^ Just add whatever is in those folders.

PS: if you want to see the full CMakeLists.txt go the the project link NEGU93/ForbiddenDesert.