unitTests - use internal library object instead of recompiling sources

unitTests/CMakeLists.txt

@@ -1,22 +1,5 @@
 find_package(GTest REQUIRED)
 
-get_target_property(exiv2lib_SOURCES exiv2lib SOURCES)
-get_target_property(exiv2lib_int_SOURCES exiv2lib_int SOURCES)
-get_target_property(exiv2lib_COMPILE_DEFINITIONS exiv2lib COMPILE_DEFINITIONS)
-get_target_property(exiv2lib_INCLUDE_DIRECTORIES exiv2lib INCLUDE_DIRECTORIES)
-get_target_property(exiv2lib_LINK_LIBRARIES exiv2lib LINK_LIBRARIES)
-
-set(unit_tests_exiv2lib_SOURCES)
-foreach(source IN LISTS exiv2lib_SOURCES exiv2lib_int_SOURCES)
-    if(source MATCHES "\.(c|cpp|h|hpp)$")
-        if(source MATCHES ".*/.*")
-            list(APPEND unit_tests_exiv2lib_SOURCES "${source}")
-        else()
-            list(APPEND unit_tests_exiv2lib_SOURCES "../src/${source}")
-        endif()
-    endif()
-endforeach()
-
 add_executable(unit_tests
     mainTestRunner.cpp
     test_DateValue.cpp
@@ -34,7 +17,7 @@ add_executable(unit_tests
     test_tiffheader.cpp
     test_types.cpp
     test_LangAltValueRead.cpp
-    ${unit_tests_exiv2lib_SOURCES}
+    $<TARGET_OBJECTS:exiv2lib_int>
 )
 
 target_compile_definitions(unit_tests
@@ -43,18 +26,9 @@ target_compile_definitions(unit_tests
     TESTDATA_PATH="${PROJECT_SOURCE_DIR}/test/data"
 )
 
-if (exiv2lib_COMPILE_DEFINITIONS)
-    target_compile_definitions(unit_tests PRIVATE ${exiv2lib_COMPILE_DEFINITIONS})
-endif ()
-
-target_include_directories(unit_tests SYSTEM
-    PRIVATE
-        ${exiv2lib_INCLUDE_DIRECTORIES}
-)
-
 target_link_libraries(unit_tests
     PRIVATE
-        ${exiv2lib_LINK_LIBRARIES}
+        exiv2lib
         GTest::GTest
         GTest::Main
 )
@@ -66,7 +40,6 @@ endif()
 
 target_include_directories(unit_tests
     PRIVATE
-        ${GTEST_INCLUDE_DIRS}
         ${CMAKE_SOURCE_DIR}/src
 )
 
@@ -74,10 +47,6 @@ set_target_properties(unit_tests PROPERTIES
     COMPILE_FLAGS ${EXTRA_COMPILE_FLAGS}
 )
 
-if (USING_CONAN)
-    target_compile_definitions(unit_tests PRIVATE ${CONAN_COMPILE_DEFINITIONS_GTEST})
-endif()
-
 if (MSVC)
     set_target_properties(unit_tests PROPERTIES LINK_FLAGS "/ignore:4099")
 endif()