CMake 链接目标从一个子目录到另一个子目录中的目标

Question

I have next project structure

/-Project
/--- LibA_folder
/--- --- CMakeLists.txt (add_library())
/--- LibB_folder
/--- --- CMakeLists.txt (add_library()) // depends on LibA
/--- Executable_folder
/--- --- CMakeLists.txt (add_executable()) // depends on LibB

When im trying to build project after this configuration sequence:

add_subdirectory(libA)
add_subdirectory(libB)
add_subdirectory(executable)

It fails on libB processing, cause seems libB doesnt see sources\headers from libA . As i understand, libB must know about libA through inner add_subfolder() command.

I can pass path to libA or maybe build libA inside libB , but it seem to be a "dirty" way.

What is a right way to add dependency?

Answer 1

Seems, my problem was in what im using variables with

target_link_libraries(${LIB_B_NAME} ${LIB_A_NAME})

If im use name of library directly, everything is working.

target_link_libraries(${LIB_B_NAME} "libA")

So, i must somehow pass variables from\to subdirectory, but this is off-topic.