CMake/Tests/ObjectLibrary/B/CMakeLists.txt

project(ObjectLibraryB C)
if("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6")
  # VS 6 generator does not use per-target object locations.
  set(vs6 _vs6)
endif()

# Add -fPIC so objects can be used in shared libraries.
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

add_library(B OBJECT b1.c b2.c)
target_include_directories(B PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_compile_definitions(B PUBLIC B_DEF)

add_library(Bexport OBJECT b1${vs6}.c b2${vs6}.c)
set_property(TARGET Bexport PROPERTY COMPILE_DEFINITIONS Bexport)
target_include_directories(Bexport PRIVATE $<TARGET_PROPERTY:B,INTERFACE_INCLUDE_DIRECTORIES>)
target_compile_definitions(Bexport PRIVATE $<TARGET_PROPERTY:B,INTERFACE_COMPILE_DEFINITIONS>)