Fix warnings when upgraded to clang 22 (#415)

Author: walbourn

CMakeLists.txt

@@ -494,7 +494,7 @@ if(MSVC)
 
     if(NO_WCHAR_T)
       message(STATUS "Using non-native wchar_t as unsigned short")
-      target_compile_options(${PROJECT_NAME} PRIVATE "/Zc:wchar_t-")
+      target_compile_options(${PROJECT_NAME} PRIVATE /Zc:wchar_t-)
     endif()
 endif()
 
@@ -505,14 +505,14 @@ target_link_options(${PROJECT_NAME} PRIVATE ${LINKER_SWITCHES})
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|IntelLLVM")
     set(WarningsLib -Wall -Wpedantic -Wextra)
     if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
-        list(APPEND WarningsLib "-Wno-unsafe-buffer-usage")
+        list(APPEND WarningsLib -Wno-unsafe-buffer-usage)
     endif()
     target_compile_options(${PROJECT_NAME} PRIVATE ${WarningsLib})
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-    target_compile_options(${PROJECT_NAME} PRIVATE "-Wno-ignored-attributes" "-Walloc-size-larger-than=4GB")
+    target_compile_options(${PROJECT_NAME} PRIVATE -Wno-ignored-attributes -Walloc-size-larger-than=4GB)
 
     if(BUILD_SHARED_LIBS)
-      target_compile_options(${PROJECT_NAME} PRIVATE "-Wno-attributes")
+      target_compile_options(${PROJECT_NAME} PRIVATE -Wno-attributes)
     endif()
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     if(BUILD_SHARED_LIBS)

Src/PlatformHelpers.h

@@ -17,6 +17,7 @@
 #include <cstdio>
 #include <exception>
 #include <memory>
+#include <string>
 
 #ifndef MAKEFOURCC
 #define MAKEFOURCC(ch0, ch1, ch2, ch3) \
@@ -41,19 +42,23 @@ namespace DirectX
     class com_exception : public std::exception
     {
     public:
-        com_exception(HRESULT hr) noexcept : result(hr) {}
+        explicit com_exception(HRESULT hr) : result(hr)
+        {
+            char str[64] = {};
+            sprintf_s(str, "Failure with HRESULT of %08X", static_cast<unsigned int>(result));
+            message = str;
+        }
 
         const char* what() const noexcept override
         {
-            static char s_str[64] = {};
-            sprintf_s(s_str, "Failure with HRESULT of %08X", static_cast<unsigned int>(result));
-            return s_str;
+            return message.c_str();
         }
 
         HRESULT get_result() const noexcept { return result; }
 
     private:
         HRESULT result;
+        std::string message;
     };
 
     // Helper utility converts D3D API failures into exceptions.

Src/pch.h

@@ -78,6 +78,7 @@
 #pragma clang diagnostic ignored "-Wlanguage-extension-token"
 #pragma clang diagnostic ignored "-Wmissing-variable-declarations"
 #pragma clang diagnostic ignored "-Wnested-anon-types"
+#pragma clang diagnostic ignored "-Wpadded"
 #pragma clang diagnostic ignored "-Wreserved-id-macro"
 #pragma clang diagnostic ignored "-Wswitch-enum"
 #pragma clang diagnostic ignored "-Wunknown-pragmas"