build: add module to handle querying platform details

cmake/Platform.cmake

@@ -0,0 +1,36 @@
+function(get_platform_details)
+	set(options)
+	set(one_value_args SYSTEM PROCESSOR)
+	set(multi_value_args
+		NAMESPACES
+		DEPENDENCIES
+		LIBS)
+	cmake_parse_arguments(PARSE_ARGV 0 arg
+		"${options}"
+		"${one_value_args}"
+		"${multi_value_args}")
+
+	set(system_name "")
+
+	if ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
+		set(system_name "linux")
+	elseif ("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
+		set(system_name "apple")
+	elseif ("${CMAKE_SYSTEM_NAME}" STREQUAL "Windows")
+		set(system_name "win32")
+	else ()
+		message(FATAL_ERROR "Unsupported platform: ${CMAKE_SYSTEM_NAME}")
+	endif ()
+
+	if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
+		set(system_arch "amd64")
+	elseif ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm64")
+		set(system_arch "aarch64")
+	else ()
+		message(FATAL_ERROR "Unsupported architecture: ${CMAKE_SYSTEM_PROCESSOR}")
+	endif ()
+
+	set(${arg_SYSTEM} ${system_name} PARENT_SCOPE)
+	set(${arg_PROCESSOR} ${system_arch} PARENT_SCOPE)
+endfunction (get_platform_details)
+