gistfile1.txt

$ git diff
diff --git a/keyboards/crkbd/keymaps/default/config.h b/keyboards/crkbd/keymaps/default/config.h
index 8f4d73ca22..5bd358e036 100644
--- a/keyboards/crkbd/keymaps/default/config.h
+++ b/keyboards/crkbd/keymaps/default/config.h
@@ -48,4 +48,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     #define RGBLIGHT_VAL_STEP 17
 #endif

+#ifdef PS2_USE_BUSYWAIT
+#   define PS2_CLOCK_PORT  PORTD
+#   define PS2_CLOCK_PIN   PIND
+#   define PS2_CLOCK_DDR   DDRD
+#   define PS2_CLOCK_BIT   0
+#   define PS2_DATA_PORT   PORTD
+#   define PS2_DATA_PIN    PIND
+#   define PS2_DATA_DDR    DDRD
+#   define PS2_DATA_BIT    1
+#endif
+
+#define PS2_MOUSE_INVERT_Y
+
 #define OLED_FONT_H "keyboards/crkbd/lib/glcdfont.c"
diff --git a/keyboards/crkbd/keymaps/default/rules.mk b/keyboards/crkbd/keymaps/default/rules.mk
index c14c202fae..59464b8f82 100644
--- a/keyboards/crkbd/keymaps/default/rules.mk
+++ b/keyboards/crkbd/keymaps/default/rules.mk
@@ -1,5 +1,8 @@
 MOUSEKEY_ENABLE = yes    # Mouse keys
-RGBLIGHT_ENABLE = yes    # Enable WS2812 RGB underlight.
-OLED_ENABLE     = yes
+RGBLIGHT_ENABLE = no    # Enable WS2812 RGB underlight.
+OLED_ENABLE     = no
 OLED_DRIVER     = SSD1306
 LTO_ENABLE      = yes
+
+PS2_MOUSE_ENABLE = yes
+PS2_USE_BUSYWAIT = yes
$
$
$ qmk compile -kb crkbd -km default
Ψ Compiling keymap with gmake --jobs=1 crkbd/rev1:default


QMK Firmware 0.14.32
Making crkbd/rev1 with keymap default

avr-gcc (Homebrew AVR GCC 8.4.0_2) 8.4.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Size before:
   text	   data	    bss	    dec	    hex	filename
      0	  27490	      0	  27490	   6b62	.build/crkbd_rev1_default.hex

Linking: .build/crkbd_rev1_default.elf                                                              [ERRORS]
 |
 | avr-gcc: error: .build/obj_crkbd_rev1_default/ps2_io_avr.o: No such file or directory
 |
gmake[1]: *** [tmk_core/rules.mk:365: .build/crkbd_rev1_default.elf] Error 1
gmake: *** [Makefile:478: crkbd/rev1:default] Error 1
Make finished with errors