diff --git a/utils.cmake b/utils.cmake
index 44afaa6..05374c4 100644
--- a/utils.cmake
+++ b/utils.cmake
@@ -55,9 +55,11 @@ function(setup_project)
     if(POLICY CMP0141)
         cmake_policy(SET CMP0141 NEW)
     endif()
-    # Introduced by CMP0141.
-    if(NOT DEFINED CMAKE_MSVC_DEBUG_INFORMATION_FORMAT)
-        set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT "$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>" PARENT_SCOPE)
+    if(MSVC)
+        # Introduced by CMP0141.
+        if(NOT DEFINED CMAKE_MSVC_DEBUG_INFORMATION_FORMAT)
+            set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT "$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>" PARENT_SCOPE)
+        endif()
     endif()
     # The if() command supports path comparisons using PATH_EQUAL operator.
     if(POLICY CMP0139)
@@ -131,9 +133,11 @@ function(setup_project)
     if(POLICY CMP0091)
         cmake_policy(SET CMP0091 NEW)
     endif()
-    # Introduced by CMP0091.
-    if(NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
-        set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL" PARENT_SCOPE)
+    if(MSVC)
+        # Introduced by CMP0091.
+        if(NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
+            set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL" PARENT_SCOPE)
+        endif()
     endif()
     # Add correct link flags for PIE (Position Independent Executable).
     if(POLICY CMP0083)
@@ -156,37 +160,86 @@ function(setup_project)
             endif()
         else()
             set(CMAKE_DEBUG_POSTFIX "_debug" PARENT_SCOPE)
-            if(APPLE)
-                set(CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_DEBUG "_debug" PARENT_SCOPE)
-            endif()
         endif()
     endif()
+    if(APPLE)
+        if(NOT DEFINED CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_DEBUG)
+            set(CMAKE_FRAMEWORK_MULTI_CONFIG_POSTFIX_DEBUG "_debug" PARENT_SCOPE)
+        endif()
+    endif()
+    set(__dir_suffix "")
+    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+        set(__dir_suffix "64")
+    endif()
     include(GNUInstallDirs)
-    if(NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
-        set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}" PARENT_SCOPE)
+    set(__bin_dir "${CMAKE_INSTALL_BINDIR}${__dir_suffix}")
+    set(__lib_dir "${CMAKE_INSTALL_LIBDIR}${__dir_suffix}")
+    set(__ar_dir "${CMAKE_INSTALL_LIBDIR}${__dir_suffix}")
+    if(DEFINED CMAKE_BUILD_TYPE AND NOT "x${CMAKE_BUILD_TYPE}" STREQUAL "x")
+        if(NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+            set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${__bin_dir}" PARENT_SCOPE)
+        endif()
+        if(NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY)
+            set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${__lib_dir}" PARENT_SCOPE)
+        endif()
+        if(NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
+            set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${__ar_dir}" PARENT_SCOPE)
+        endif()
+    elseif(DEFINED CMAKE_CONFIGURATION_TYPES AND NOT "x${CMAKE_CONFIGURATION_TYPES}" STREQUAL "x")
+        foreach(__type ${CMAKE_CONFIGURATION_TYPES})
+            string(TOUPPER ${__type} __type_upper)
+            string(TOLOWER ${__type} __type_lower)
+            set(__bin_var CMAKE_RUNTIME_OUTPUT_DIRECTORY_${__type_upper})
+            if(NOT DEFINED ${__bin_var})
+                set(${__bin_var} "${PROJECT_BINARY_DIR}/${__bin_dir}/${__type_lower}" PARENT_SCOPE)
+            endif()
+            set(__lib_var CMAKE_LIBRARY_OUTPUT_DIRECTORY_${__type_upper})
+            if(NOT DEFINED ${__lib_var})
+                set(${__lib_var} "${PROJECT_BINARY_DIR}/${__lib_dir}/${__type_lower}" PARENT_SCOPE)
+            endif()
+            set(__ar_var CMAKE_ARCHIVE_OUTPUT_DIRECTORY_${__type_upper})
+            if(NOT DEFINED ${__ar_var})
+                set(${__ar_var} "${PROJECT_BINARY_DIR}/${__ar_dir}/${__type_lower}" PARENT_SCOPE)
+            endif()
+        endforeach()
     endif()
-    if(NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY)
-        set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}" PARENT_SCOPE)
+    if(NOT DEFINED CMAKE_INCLUDE_CURRENT_DIR)
+        set(CMAKE_INCLUDE_CURRENT_DIR ON PARENT_SCOPE)
     endif()
-    if(NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
-        set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}" PARENT_SCOPE)
+    if(NOT DEFINED CMAKE_LINK_DEPENDS_NO_SHARED)
+        set(CMAKE_LINK_DEPENDS_NO_SHARED ON PARENT_SCOPE)
+    endif()
+    if(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE)
+        set(CMAKE_POSITION_INDEPENDENT_CODE ON PARENT_SCOPE)
     endif()
-    set(CMAKE_INCLUDE_CURRENT_DIR ON PARENT_SCOPE)
-    set(CMAKE_LINK_DEPENDS_NO_SHARED ON PARENT_SCOPE)
-    set(CMAKE_POSITION_INDEPENDENT_CODE ON PARENT_SCOPE)
     include(CheckPIESupported)
     check_pie_supported() # This function must be called to ensure CMake adds -fPIE to the linker flags.
-    set(CMAKE_VISIBILITY_INLINES_HIDDEN ON PARENT_SCOPE)
-    set(CMAKE_INSTALL_RPATH_USE_LINK_PATH ON PARENT_SCOPE)
+    if(NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN)
+        set(CMAKE_VISIBILITY_INLINES_HIDDEN ON PARENT_SCOPE)
+    endif()
+    if(NOT DEFINED CMAKE_INSTALL_RPATH_USE_LINK_PATH)
+        set(CMAKE_INSTALL_RPATH_USE_LINK_PATH ON PARENT_SCOPE)
+    endif()
     if(APPLE)
-        set(CMAKE_MACOSX_RPATH ON PARENT_SCOPE)
+        if(NOT DEFINED CMAKE_MACOSX_RPATH)
+            set(CMAKE_MACOSX_RPATH ON PARENT_SCOPE)
+        endif()
     else()
-        set(CMAKE_INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}" PARENT_SCOPE)
+        if(NOT DEFINED CMAKE_INSTALL_RPATH)
+            # FIXME: how to detect the actual library installation path?
+            #set(CMAKE_INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}" PARENT_SCOPE)
+        endif()
     endif()
     if(PROJ_ARGS_QT_PROJECT)
-        set(CMAKE_AUTOUIC ON PARENT_SCOPE)
-        set(CMAKE_AUTOMOC ON PARENT_SCOPE)
-        set(CMAKE_AUTORCC ON PARENT_SCOPE)
+        if(NOT DEFINED CMAKE_AUTOUIC)
+            set(CMAKE_AUTOUIC ON PARENT_SCOPE)
+        endif()
+        if(NOT DEFINED CMAKE_AUTOMOC)
+            set(CMAKE_AUTOMOC ON PARENT_SCOPE)
+        endif()
+        if(NOT DEFINED CMAKE_AUTORCC)
+            set(CMAKE_AUTORCC ON PARENT_SCOPE)
+        endif()
     endif()
     if(PROJ_ARGS_QML_IMPORT_DIR)
         list(APPEND QML_IMPORT_PATH "${PROJ_ARGS_QML_IMPORT_DIR}")
@@ -194,14 +247,21 @@ function(setup_project)
         set(QML_IMPORT_PATH ${QML_IMPORT_PATH} CACHE STRING "Qt Creator extra QML import paths" FORCE)
     endif()
     foreach(__lang ${PROJ_ARGS_LANGUAGES})
-        if(__lang STREQUAL "C")
+        string(TOUPPER ${__lang} __lang_upper)
+        if(__lang_upper STREQUAL "C")
             enable_language(C)
             if(NOT DEFINED CMAKE_C_STANDARD)
                 set(CMAKE_C_STANDARD 11 PARENT_SCOPE)
             endif()
-            set(CMAKE_C_STANDARD_REQUIRED ON PARENT_SCOPE)
-            set(CMAKE_C_EXTENSIONS OFF PARENT_SCOPE)
-            set(CMAKE_C_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
+            if(NOT DEFINED CMAKE_C_STANDARD_REQUIRED)
+                set(CMAKE_C_STANDARD_REQUIRED ON PARENT_SCOPE)
+            endif()
+            if(NOT DEFINED CMAKE_C_EXTENSIONS)
+                set(CMAKE_C_EXTENSIONS OFF PARENT_SCOPE)
+            endif()
+            if(NOT DEFINED CMAKE_C_VISIBILITY_PRESET)
+                set(CMAKE_C_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
+            endif()
             if(MSVC)
                 if(NOT ("x${CMAKE_C_FLAGS}" STREQUAL "x"))
                     string(REGEX REPLACE "[-|/]w " " " CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
@@ -260,14 +320,20 @@ function(setup_project)
                 set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} PARENT_SCOPE)
                 set(CMAKE_C_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE} PARENT_SCOPE)
             endif()
-        elseif(__lang STREQUAL "CXX")
+        elseif(__lang_upper STREQUAL "CXX")
             enable_language(CXX)
             if(NOT DEFINED CMAKE_CXX_STANDARD)
                 set(CMAKE_CXX_STANDARD 20 PARENT_SCOPE)
             endif()
-            set(CMAKE_CXX_STANDARD_REQUIRED ON PARENT_SCOPE)
-            set(CMAKE_CXX_EXTENSIONS OFF PARENT_SCOPE)
-            set(CMAKE_CXX_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
+            if(NOT DEFINED CMAKE_CXX_STANDARD_REQUIRED)
+                set(CMAKE_CXX_STANDARD_REQUIRED ON PARENT_SCOPE)
+            endif()
+            if(NOT DEFINED CMAKE_CXX_EXTENSIONS)
+                set(CMAKE_CXX_EXTENSIONS OFF PARENT_SCOPE)
+            endif()
+            if(NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
+                set(CMAKE_CXX_VISIBILITY_PRESET "hidden" PARENT_SCOPE)
+            endif()
             if(MSVC)
                 if(NOT ("x${CMAKE_CXX_FLAGS}" STREQUAL "x"))
                     string(REGEX REPLACE "[-|/]GR-? " " " CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
@@ -348,7 +414,7 @@ function(setup_project)
                 set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} PARENT_SCOPE)
                 set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE} PARENT_SCOPE)
             endif()
-        elseif(__lang STREQUAL "RC")
+        elseif(__lang_upper STREQUAL "RC")
             if(WIN32)
                 enable_language(RC)
             endif()