2 g
++ -Ofast
-mfpu
=vfp
-mfloat-abi
=hard
-march
=armv6zk
-mtune
=arm1176jzf-s
-Wall
-lArduiPi_OLED
-Wno-write-strings oled_menu.
cpp -o oled_menu
3 g
++ -Ofast
-mfpu
=vfp
-mfloat-abi
=hard
-march
=armv6zk
-mtune
=arm1176jzf-s
-Wall
-lArduiPi_OLED
-Wno-write-strings oled_passwd.
cpp -o oled_passwd
4 g
++ -Ofast
-mfpu
=vfp
-mfloat-abi
=hard
-march
=armv6zk
-mtune
=arm1176jzf-s
-Wall
-lArduiPi_OLED
-Wno-write-strings oled_clear.
cpp -o oled_clear