Add examples for building with CMake

cmake/Makefile

@@ -0,0 +1,5 @@
+SUBDIRS:= `ls | egrep -v '^(CVS)$$'`
+all:
+	@for i in $(SUBDIRS); do if test -e $$i/CMakeLists.txt ; then (arm-none-eabi-cmake -B $$i/build -S $$i && cmake --build $$i/build) || { exit 1;} fi; done;
+clean:
+	@for i in $(SUBDIRS); do rm -rf $$i/build; done;

cmake/arm9/CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.7)
+project(cmake-example LANGUAGES C)
+
+add_executable(cmake-example source/main.c)
+nds_create_rom(cmake-example)

cmake/arm9/source/main.c

@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------
+
+	Basic template code for starting a DS app
+
+---------------------------------------------------------------------------------*/
+#include <nds.h>
+#include <stdio.h>
+//---------------------------------------------------------------------------------
+int main(void) {
+//---------------------------------------------------------------------------------
+	consoleDemoInit();
+	iprintf("Hello World!");
+	while(1) {
+		swiWaitForVBlank();
+		scanKeys();
+		int pressed = keysDown();
+		if(pressed & KEY_START) break;
+	}
+
+}