initial commit

lib/hello.cpp

@@ -0,0 +1,9 @@
+#include "hello.h"
+
+int add(int x, int y) {
+ return x + y;
+} 
+
+// C:\Users\user\AppData\Local\Arduino15\packages\esp32\tools\xtensa-esp32-elf-gcc\gcc8_4_0-esp-2021r2-patch3\bin
+// xtensa-esp32-elf-gcc.exe -c hello.cpp -o hello.o
+// xtensa-esp32-elf-ar.exe crf hello.a hello.o