INTERFACE_POSITION_INDEPENDENT_CODE must be transitive for OBJECT library

Fixes: #22174

Source/cmLocalGenerator.cxx

@@ -2306,13 +2306,6 @@ void cmLocalGenerator::AddCMP0018Flags(std::string& flags,
   if (this->GetShouldUseOldFlags(shared, lang)) {
     this->AddSharedFlags(flags, lang, shared);
   } else {
-    if (target->GetType() == cmStateEnums::OBJECT_LIBRARY) {
-      if (target->GetPropertyAsBool("POSITION_INDEPENDENT_CODE")) {
-        this->AddPositionIndependentFlags(flags, lang, targetType);
-      }
-      return;
-    }
-
     if (target->GetLinkInterfaceDependentBoolProperty(
           "POSITION_INDEPENDENT_CODE", config)) {
       this->AddPositionIndependentFlags(flags, lang, targetType);

Tests/PositionIndependentTargets/interface/CMakeLists.txt

@@ -12,6 +12,9 @@ set_property(TARGET sharedlib PROPERTY DEFINE_SYMBOL PIC_TEST_BUILD_DLL)
 add_executable(test_iface_via_shared "${CMAKE_CURRENT_SOURCE_DIR}/../pic_main.cpp")
 target_link_libraries(test_iface_via_shared sharedlib)
 
+add_library(objectlib OBJECT "${CMAKE_CURRENT_SOURCE_DIR}/../pic_lib.cpp")
+target_link_libraries(objectlib piciface)
+
 add_library(sharedlibpic SHARED "${CMAKE_CURRENT_SOURCE_DIR}/../pic_lib.cpp")
 set_property(TARGET sharedlibpic PROPERTY INTERFACE_POSITION_INDEPENDENT_CODE ON)
 set_property(TARGET sharedlibpic PROPERTY DEFINE_SYMBOL PIC_TEST_BUILD_DLL)