Cmake links only to executable - c++

Question

I have a problem that in my project I have multiple libraries who all link eachother differently.
And then there is one executable that links to only one library.
Now there are two problems:
1) The linked libraries are not showing up in the librarian of the static libraries.
2) the librarires are all showing up at the executable.
So here is my project order
Game|- Engine|--Core|---Graphics|----Libpng|---Platform
so Graphic links Libpng
Core links Graphics and Platform
Engine links Core
Game links Engine
Utilities is an interface library so headers only
what happens is that all Additional dependencies are at Game
The librarian of Core, Engine and Graphic containts no additional dependencies.
This is the Root CMake
cmake_minimum_required(VERSION 2.8.9)
set(CMAKE_GENERATOR "Visual Studio 14 2015")
project(EngineOnly)
set(CMAKE_SUPPRESS_REGENERATION true)
if(WIN32)
set(PLATFORM WIN32)
else()
set(PLATFORM LINUX)
endif (WIN32)
add_subdirectory(UTILITIES)
add_subdirectory(PLATFORM)
add_subdirectory(GRAPHICS)
add_subdirectory(CORE)
add_subdirectory(Engine)
add_subdirectory(Game)
set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT Trinity.Game)
This is game
#UTILITIES LIB
include_directories(../UTILITIES/INCLUDE)
include_directories(../ENGINE/INCLUDE)
#SOURCE
file(GLOB SOURCES "SOURCE/*.cpp")
file(GLOB INCLUDES "INCLUDE/*.h")
#PROJECTNAME
set(PROJECTNAME "Trinity.Game")
#LINK ALL
add_executable(${PROJECTNAME} ${SOURCES} ${INCLUDES})
set_target_properties(${PROJECTNAME} PROPERTIES
RUNTIME_OUTPUT_DIRECTORY_DEBUG "${CMAKE_BINARY_DIR}/../BIN/${PLATFORM}/DEBUG"
RUNTIME_OUTPUT_DIRECTORY_RELEASE "${CMAKE_BINARY_DIR}/../BIN/${PLATFORM}/RELEASE"
)
target_link_libraries(${PROJECTNAME}
LINK_PRIVATE Trinity.Engine
)
Engine
#UTILITIES LIB
include_directories(../UTILITIES/INCLUDE)
include_directories(../CORE/INCLUDE)
#SOURCE
file(GLOB SOURCES "SOURCE/*.cpp")
file(GLOB INCLUDES "INCLUDE/*.h")
#PROJECTNAME
set(PROJECTNAME "Trinity.Engine")
#LINK ALL
add_library(${PROJECTNAME} ${SOURCES} ${INCLUDES})
set_target_properties(${PROJECTNAME} PROPERTIES
ARCHIVE_OUTPUT_DIRECTORY_DEBUG "${CMAKE_CURRENT_BINARY_DIR}/LIB/${PLATFORM}/DEBUG"
ARCHIVE_OUTPUT_DIRECTORY_RELEASE "${CMAKE_CURRENT_BINARY_DIR}/LIB/${PLATFORM}/RELEASE"
)
target_link_libraries(${PROJECTNAME}
LINK_PRIVATE Trinity.Core
)
Core
#UTILITIES LIB
include_directories(../UTILITIES/INCLUDE)
include_directories(../GRAPHICS/INCLUDE)
include_directories(../PLATFORM/INCLUDE)
#SOURCE
file(GLOB SOURCES "SOURCE/*.cpp")
file(GLOB INCLUDES "INCLUDE/*.h")
#PROJECTNAME
set(PROJECTNAME "Trinity.Core")
#LINK ALL
add_library(${PROJECTNAME} ${SOURCES} ${INCLUDES})
set_target_properties(${PROJECTNAME} PROPERTIES
ARCHIVE_OUTPUT_DIRECTORY_DEBUG "${CMAKE_CURRENT_BINARY_DIR}/LIB/${PLATFORM}/DEBUG"
ARCHIVE_OUTPUT_DIRECTORY_RELEASE "${CMAKE_CURRENT_BINARY_DIR}/LIB/${PLATFORM}/RELEASE"
)
target_link_libraries(${PROJECTNAME}
LINK_PRIVATE Trinity.Graphics
LINK_PRIVATE Trinity.Platform
)
The other look the same.
I've tried PRIVATE instead of LINK_PRIVATE but the result is the same.

Answer 1

You can't link static libraries against each other and it is normal that they only showing up at the executable. Does your code not compiling?
For more information about static and dynamic libraries I suggest this article.
If you want to change the library type in cmake specify the add_lib command:
add_library(${LIB_NAME} ${LIB_TYPE} ${SOURCE})
# with ${LIB_TYPE} = STATIC or SHARED
more informations about cmake
If you have more problems or my answer answer to you is not enough please specify your question.