Adds feature check for c++26

modules/compiler/features.cmake

@@ -1 +1,2 @@
-include(features/reflection)
+include(features/reflection)
+include(features/c++26)

modules/features/c++26.cmake

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.26)
+project(TestCXX)
+
+# Default to C++23
+set(STD_VERSION 23)
+
+# Check if the compiler supports C++26
+include(CheckCXXCompilerFlag)
+check_cxx_compiler_flag("-std=c++26" COMPILER_SUPPORTS_CXX26)
+
+if(COMPILER_SUPPORTS_CXX26)
+	set(STD_VERSION 26)
+endif()
+
+add_executable(${PROJECT_NAME} main.cpp)
+target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_${STD_VERSION})

modules/helpers.cmake

@@ -23,7 +23,11 @@ function(ConfigureFGLTarget NAME SRC_DIR INCLUDE_DIR)
 		target_compile_definitions(${NAME} PUBLIC "-DFGL_STRICT_WARNINGS=1")
 	endif ()
 
-	target_compile_features(${NAME} PUBLIC cxx_std_26)
+	if (COMPILER_SUPPORTS_CXX26)
+		target_compile_features(${NAME} PUBLIC cxx_std_26)
+	else ()
+		target_compile_features(${NAME} PUBLIC cxx_std_23)
+	endif ()
 endfunction()
 
 function(SplitDebugSymbols NAME)