Add config.h for version information

CMakeLists.txt

@@ -5,7 +5,7 @@ set(CMAKE_CXX_COMPILER_WORKS 1)
 
 set(CMAKE_CROSSCOMPILING true)
 
-project(Luna LANGUAGES C CXX ASM_NASM)
+project(Luna LANGUAGES C CXX ASM_NASM VERSION 0.1.0)
 
 set(LUNA_ROOT ${CMAKE_CURRENT_LIST_DIR})
 

kernel/CMakeLists.txt

@@ -58,6 +58,10 @@ set_target_properties(moon PROPERTIES CXX_STANDARD 20)
 
 target_include_directories(moon PRIVATE ${CMAKE_CURRENT_LIST_DIR}/src)
 
+configure_file(src/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/gen/config.h @ONLY)
+
+target_include_directories(moon PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/gen)
+
 target_link_options(moon PRIVATE LINKER:-T ${CMAKE_CURRENT_LIST_DIR}/moon.ld -nostdlib -nodefaultlibs)
 
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/moon" DESTINATION ${LUNA_ROOT}/initrd/boot)

kernel/src/config.h.in

@@ -0,0 +1,6 @@
+#pragma once
+
+#define MOON_VERSION "@CMAKE_PROJECT_VERSION@"
+#define MOON_VERSION_MAJOR "@CMAKE_PROJECT_VERSION_MAJOR@"
+#define MOON_VERSION_MINOR "@CMAKE_PROJECT_VERSION_MINOR@"
+#define MOON_VERSION_PATCH "@CMAKE_PROJECT_VERSION_PATCH@"

kernel/src/main.cpp

@@ -4,6 +4,7 @@
 #include "arch/Serial.h"
 #include "arch/Timer.h"
 #include "boot/Init.h"
+#include "config.h"
 #include "memory/Heap.h"
 #include "memory/MemoryManager.h"
 #include "video/TextConsole.h"
@@ -11,7 +12,7 @@
 
 Result<void> init()
 {
-    kinfoln("Hello, world!");
+    kinfoln("Starting Moon %s", MOON_VERSION);
 
     kinfoln("Current platform: %s", CPU::platform_string());
 

luna/Check.h

@@ -3,7 +3,9 @@
 
 extern _noreturn bool __check_failed(const char* file, const char* line, const char* func, const char* expr);
 
+#ifndef STRINGIZE_VALUE_OF
 #define STRINGIZE(x) #x
 #define STRINGIZE_VALUE_OF(x) STRINGIZE(x)
+#endif
 
 #define check(expr) (expr) || __check_failed(__FILE__, STRINGIZE_VALUE_OF(__LINE__), __PRETTY_FUNCTION__, #expr)