diff --git a/CMakeLists.txt b/CMakeLists.txt
index af4b3cef3..fb2c68729 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,10 +25,6 @@ if(POLICY CMP0091)
 endif()
 project(FreeRDP LANGUAGES C)
 
-set(CMAKE_C_STANDARD 11)
-set(CMAKE_C_STANDARD_REQUIRED ON)
-set(CMAKE_C_EXTENSIONS ON)
-
 add_custom_target(fuzzers COMMENT "Build fuzzers")
 
 if(NOT DEFINED VENDOR)
@@ -60,6 +56,8 @@ endif()
 # Include our extra modules
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/)
 
+include(ProjectCStandard)
+
 # Check for cmake compatibility (enable/disable features)
 include(CheckCmakeCompat)
 
diff --git a/client/SDL/CMakeLists.txt b/client/SDL/CMakeLists.txt
index fd67ec593..f37ccb7a8 100644
--- a/client/SDL/CMakeLists.txt
+++ b/client/SDL/CMakeLists.txt
@@ -28,11 +28,8 @@ project(sdl-freerdp LANGUAGES CXX VERSION ${FREERDP_DEFAULT_PROJECT_VERSION})
 
 message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS ON)
-
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/)
+include(ProjectCXXStandard)
 include(CommonConfigOptions)
 
 include(ConfigureFreeRDP)
diff --git a/client/SDL/SDL2/dialogs/sdl_widget.hpp b/client/SDL/SDL2/dialogs/sdl_widget.hpp
index 10c2a6b4a..4d49a91bf 100644
--- a/client/SDL/SDL2/dialogs/sdl_widget.hpp
+++ b/client/SDL/SDL2/dialogs/sdl_widget.hpp
@@ -81,7 +81,7 @@ class SdlWidget
 
 	TTF_Font* _font = nullptr;
 	SDL_Texture* _image = nullptr;
-	SDL_Rect _rect;
+	SDL_Rect _rect = {};
 	bool _input = false;
 	bool _wrap = false;
 	size_t _text_width = 0;
diff --git a/client/SDL/SDL3/dialogs/sdl_widget.hpp b/client/SDL/SDL3/dialogs/sdl_widget.hpp
index bdefc5003..6deff5164 100644
--- a/client/SDL/SDL3/dialogs/sdl_widget.hpp
+++ b/client/SDL/SDL3/dialogs/sdl_widget.hpp
@@ -79,7 +79,7 @@ class SdlWidget
 
 	TTF_Font* _font = nullptr;
 	SDL_Texture* _image = nullptr;
-	SDL_FRect _rect;
+	SDL_FRect _rect = {};
 	bool _input = false;
 	bool _wrap = false;
 	size_t _text_width = 0;
diff --git a/client/Sample/CMakeLists.txt b/client/Sample/CMakeLists.txt
index 4783ca6b9..4eabb029c 100644
--- a/client/Sample/CMakeLists.txt
+++ b/client/Sample/CMakeLists.txt
@@ -27,11 +27,8 @@ project(sfreerdp LANGUAGES C VERSION ${FREERDP_DEFAULT_PROJECT_VERSION})
 
 message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 
-set(CMAKE_C_STANDARD 11)
-set(CMAKE_C_STANDARD_REQUIRED ON)
-set(CMAKE_C_EXTENSIONS ON)
-
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/)
+include(ProjectCStandard)
 include(CommonConfigOptions)
 
 include(ConfigureFreeRDP)
diff --git a/client/X11/CMakeLists.txt b/client/X11/CMakeLists.txt
index 5fd376599..85ee03868 100644
--- a/client/X11/CMakeLists.txt
+++ b/client/X11/CMakeLists.txt
@@ -27,11 +27,8 @@ message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 
 set(MODULE_NAME "xfreerdp")
 
-set(CMAKE_C_STANDARD 11)
-set(CMAKE_C_STANDARD_REQUIRED ON)
-set(CMAKE_C_EXTENSIONS ON)
-
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/)
+include(ProjectCStandard)
 include(CommonConfigOptions)
 
 include(ConfigureFreeRDP)
diff --git a/cmake/CommonCompilerFlags.cmake b/cmake/CommonCompilerFlags.cmake
index d755cf37b..1031fef4c 100644
--- a/cmake/CommonCompilerFlags.cmake
+++ b/cmake/CommonCompilerFlags.cmake
@@ -21,6 +21,7 @@ if(ENABLE_WARNING_VERBOSE)
       -Wno-reserved-identifier
       -Wno-covered-switch-default
       -Wno-disabled-macro-expansion
+      -Wno-used-but-marked-unused
     )
   endif()
 endif()
diff --git a/cmake/ProjectCStandard.cmake b/cmake/ProjectCStandard.cmake
new file mode 100644
index 000000000..b91a55ebe
--- /dev/null
+++ b/cmake/ProjectCStandard.cmake
@@ -0,0 +1,3 @@
+set(CMAKE_C_STANDARD 11 CACHE STRING "project default")
+set(CMAKE_C_STANDARD_REQUIRED ON CACHE BOOL "project default")
+set(CMAKE_C_EXTENSIONS ON CACHE BOOL "project default")
diff --git a/cmake/ProjectCXXStandard.cmake b/cmake/ProjectCXXStandard.cmake
new file mode 100644
index 000000000..1db12fac5
--- /dev/null
+++ b/cmake/ProjectCXXStandard.cmake
@@ -0,0 +1,3 @@
+set(CMAKE_CXX_STANDARD 17 CACHE STRING "project default")
+set(CMAKE_CXX_STANDARD_REQUIRED ON CACHE BOOL "project default")
+set(CMAKE_CXX_EXTENSIONS ON CACHE BOOL "project default")
diff --git a/rdtk/CMakeLists.txt b/rdtk/CMakeLists.txt
index 803afdb4b..1929e4b79 100644
--- a/rdtk/CMakeLists.txt
+++ b/rdtk/CMakeLists.txt
@@ -23,13 +23,12 @@ set(RDTK_VERSION "${RDTK_VERSION_MAJOR}.${RDTK_VERSION_MINOR}.${RDTK_VERSION_REV
 set(RDTK_VERSION_FULL "${RDTK_VERSION}")
 set(RDTK_API_VERSION "${RDTK_VERSION_MAJOR}")
 
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/)
 if(NOT FREERDP_UNIFIED_BUILD)
   cmake_minimum_required(VERSION 3.13)
   project(RdTk VERSION ${RDTK_VERSION} LANGUAGES C)
 
-  set(CMAKE_C_STANDARD 11)
-  set(CMAKE_C_STANDARD_REQUIRED ON)
-  set(CMAKE_C_EXTENSIONS ON)
+  include(ProjectCStandard)
 
   set(WINPR_VERSION_MAJOR 3)
   option(BUILD_TESTING_INTERNAL "Build library unit tests" ON)
@@ -40,7 +39,6 @@ else()
 endif()
 
 # Include our extra modules
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/)
 include(CommonConfigOptions)
 
 # Include cmake modules
diff --git a/server/proxy/modules/bitmap-filter/CMakeLists.txt b/server/proxy/modules/bitmap-filter/CMakeLists.txt
index d6c82fec0..1216506eb 100644
--- a/server/proxy/modules/bitmap-filter/CMakeLists.txt
+++ b/server/proxy/modules/bitmap-filter/CMakeLists.txt
@@ -33,12 +33,10 @@ project(proxy-bitmap-filter-plugin VERSION ${FREERDP_DEFAULT_PROJECT_VERSION} LA
 message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../../cmake/)
+include(ProjectCXXStandard)
 include(CommonConfigOptions)
 include(CXXCompilerFlags)
 
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 set(SRCS bitmap-filter.cpp)
 addtargetwithresourcefile(${PROJECT_NAME} FALSE "${PROJECT_VERSION}" SRCS FALSE)
 
diff --git a/server/proxy/modules/demo/CMakeLists.txt b/server/proxy/modules/demo/CMakeLists.txt
index 5502afa4f..0f2af41c9 100644
--- a/server/proxy/modules/demo/CMakeLists.txt
+++ b/server/proxy/modules/demo/CMakeLists.txt
@@ -33,12 +33,10 @@ project(proxy-demo-plugin VERSION ${FREERDP_DEFAULT_PROJECT_VERSION} LANGUAGES C
 message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../../cmake/)
+include(ProjectCXXStandard)
 include(CommonConfigOptions)
 include(CXXCompilerFlags)
 
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 set(SRCS demo.cpp)
 addtargetwithresourcefile(${PROJECT_NAME} FALSE "${PROJECT_VERSION}" SRCS FALSE)
 
diff --git a/server/proxy/modules/dyn-channel-dump/CMakeLists.txt b/server/proxy/modules/dyn-channel-dump/CMakeLists.txt
index 3eb6f6ed4..d2549e191 100644
--- a/server/proxy/modules/dyn-channel-dump/CMakeLists.txt
+++ b/server/proxy/modules/dyn-channel-dump/CMakeLists.txt
@@ -34,9 +34,7 @@ message("project ${PROJECT_NAME} is using version ${PROJECT_VERSION}")
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../../../cmake/)
 include(CommonConfigOptions)
 include(CXXCompilerFlags)
-
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
+include(ProjectCXXStandard)
 
 set(SRCS dyn-channel-dump.cpp)
 addtargetwithresourcefile(${PROJECT_NAME} FALSE "${PROJECT_VERSION}" SRCS FALSE)
diff --git a/uwac/CMakeLists.txt b/uwac/CMakeLists.txt
index c6693bf88..82d098c0e 100644
--- a/uwac/CMakeLists.txt
+++ b/uwac/CMakeLists.txt
@@ -23,13 +23,12 @@ set(UWAC_VERSION "${UWAC_VERSION_MAJOR}.${UWAC_VERSION_MINOR}.${UWAC_VERSION_REV
 set(UWAC_VERSION_FULL "${UWAC_VERSION}")
 set(UWAC_API_VERSION "${UWAC_VERSION_MAJOR}")
 
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/)
 if(NOT FREERDP_UNIFIED_BUILD)
   cmake_minimum_required(VERSION 3.13)
   project(uwac VERSION ${UWAC_VERSION} LANGUAGES C)
 
-  set(CMAKE_C_STANDARD 11)
-  set(CMAKE_C_STANDARD_REQUIRED ON)
-  set(CMAKE_C_EXTENSIONS ON)
+  include(ProjectCStandard)
 
   option(BUILD_TESTING_INTERNAL "Build library unit tests" ON)
 
@@ -40,7 +39,6 @@ option(UWAC_FORCE_STATIC_BUILD "Force UWAC to be build as static library (recomm
 option(UWAC_HAVE_PIXMAN_REGION "Use PIXMAN or FreeRDP for region calculations" "NOT FREERDP_UNIFIED_BUILD")
 
 # Include our extra modules
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/)
 include(CommonConfigOptions)
 
 include(CheckFunctionExists)
diff --git a/winpr/CMakeLists.txt b/winpr/CMakeLists.txt
index 08e33e186..dc9384c6a 100644
--- a/winpr/CMakeLists.txt
+++ b/winpr/CMakeLists.txt
@@ -26,10 +26,7 @@ if(NOT FREERDP_UNIFIED_BUILD)
   endif()
   project(WinPR LANGUAGES C)
 
-  set(CMAKE_C_STANDARD 11)
-  set(CMAKE_C_STANDARD_REQUIRED ON)
-  set(CMAKE_C_EXTENSIONS ON)
-
+  include(ProjectCStandard)
   include(CommonConfigOptions)
   include(ConfigOptions)
 
diff --git a/winpr/include/winpr/platform.h b/winpr/include/winpr/platform.h
index a88066a17..be331a044 100644
--- a/winpr/include/winpr/platform.h
+++ b/winpr/include/winpr/platform.h
@@ -593,6 +593,16 @@ WINPR_PRAGMA_DIAG_POP
 #endif
 #endif
 
+#if defined(__cplusplus) && (__cplusplus >= 201703L)
+#define WINPR_ATTR_UNUSED [[maybe_unused]] /** @since version 3.12.0 */
+#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202000L)
+#define WINPR_ATTR_UNUSED [[maybe_unused]] /** @since version 3.12.0 */
+#elif defined(__GNUC__) || defined(__clang__)
+#define WINPR_ATTR_UNUSED __attribute__((unused)) /** @since version 3.12.0 */
+#else
+#define WINPR_ATTR_UNUSED /** @since version 3.12.0 */
+#endif
+
 #define WINPR_UNUSED(x) (void)(x)
 
 #endif /* WINPR_PLATFORM_H */