Better handle LTO_ENABLE (#9832)

* Better handle LTO_ENABLE

Especially when calling from command line

* Replace LINK_TIME_OPTIMIZATION_ENABLE with LTO_ENABLE

* Remove long for LTO from show_options.mk

docs/config_options.md

@@ -324,11 +324,9 @@ This is a [make](https://www.gnu.org/software/make/manual/make.html) file that i
     ```
 * `LAYOUTS`
   * A list of [layouts](feature_layouts.md) this keyboard supports.
-* `LINK_TIME_OPTIMIZATION_ENABLE`
+* `LTO_ENABLE`
   * Enables Link Time Optimization (LTO) when compiling the keyboard.  This makes the process take longer, but it can significantly reduce the compiled size (and since the firmware is small, the added time is not noticeable).
 However, this will automatically disable the legacy TMK Macros and Functions features, as these break when LTO is enabled.  It does this by automatically defining `NO_ACTION_MACRO` and `NO_ACTION_FUNCTION`.  (Note: This does not affect QMK [Macros](feature_macros.md) and [Layers](feature_layers.md).)
-* `LTO_ENABLE`
-  * Has the same meaning as `LINK_TIME_OPTIMIZATION_ENABLE`.  You can use `LTO_ENABLE` instead of `LINK_TIME_OPTIMIZATION_ENABLE`.
 
 ## AVR MCU Options
 * `MCU = atmega32u4`

docs/ja/config_options.md

@@ -322,11 +322,9 @@ QMK での全ての利用可能な設定にはデフォルトがあります。
     ```
 * `LAYOUTS`
   * このキーボードがサポートする[レイアウト](ja/feature_layouts.md)のリスト
-* `LINK_TIME_OPTIMIZATION_ENABLE`
+* `LTO_ENABLE`
   * キーボードをコンパイルする時に、Link Time Optimization (LTO) を有効にします。これは処理に時間が掛かりますが、コンパイルされたサイズを大幅に減らします (そして、ファームウェアが小さいため、追加の時間は分からないくらいです)。
 ただし、LTO が有効な場合、古い TMK のマクロと関数の機能が壊れるため、自動的にこれらの機能を無効にします。これは `NO_ACTION_MACRO` と `NO_ACTION_FUNCTION` を自動的に定義することで行われます。(メモ: これは QMK の [マクロ](ja/feature_macros.md) と [レイヤー](ja/feature_layers.md) には影響を与えません。)
-* `LTO_ENABLE`
-  * LINK_TIME_OPTIMIZATION_ENABLE と同じ意味です。`LINK_TIME_OPTIMIZATION_ENABLE` の代わりに `LTO_ENABLE` を使うことができます。
 
 ## AVR MCU オプション
 * `MCU = atmega32u4`

keyboards/1upkeyboards/sweet16/v1/rules.mk

@@ -14,4 +14,4 @@ BOOTLOADER = caterina
 RGBLIGHT_ENABLE = yes
 BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/1upkeyboards/sweet16/v2/promicro/rules.mk

@@ -18,4 +18,4 @@ CONSOLE_ENABLE = yes
 RGBLIGHT_ENABLE = no
 ENCODER_ENABLE = yes
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/bm60rgb/rules.mk

@@ -31,7 +31,7 @@ BLUETOOTH_ENABLE = no        # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no            # Audio output on port C6
 FAUXCLICKY_ENABLE = no       # Use buzzer to emulate clicky switches
 RGB_MATRIX_ENABLE = WS2812
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # partially generated by KBFirmware JSON to QMK Parser
 # https://noroadsleft.github.io/kbf_qmk_converter/

keyboards/clueboard/66/keymaps/via/rules.mk

@@ -1,4 +1,4 @@
 # rules.mk overrides to enable VIA
 
 VIA_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/clueboard/card/rules.mk

@@ -26,4 +26,4 @@ UNICODE_ENABLE = no        # Unicode
 BLUETOOTH_ENABLE = no      # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = yes         # Audio output on port C6
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/converter/usb_usb/keymaps/chriskopher/rules.mk

@@ -19,6 +19,6 @@ EXTRAKEY_ENABLE = yes # Used for audio control and system control keys
 COMBO_ENABLE = yes # Used to allow chording of keys to trigger an action
 TAP_DANCE_ENABLE = yes # Used to allow multiple taps of a key to perform different actions
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes # Reduces the compiled firmware size
+LTO_ENABLE = yes # Reduces the compiled firmware size
 
 SRC += combo.c tap_dance.c

keyboards/crkbd/keymaps/ninjonas/rules.mk

@@ -1,7 +1,7 @@
 RGB_MATRIX_ENABLE = WS2812
 MOUSEKEY_ENABLE = no
 OLED_DRIVER_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend

keyboards/crkbd/keymaps/rpbaptist/rules.mk

@@ -1,5 +1,5 @@
 #This enables Link Time Optimization.This can save a good chunk of space(several KB for me), but the macro and function... functions cause it to error out.
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 #Build Options
 #change to "no" to disable the options, or define them in the Makefile in

keyboards/dz60/keymaps/via/rules.mk

@@ -1,2 +1,2 @@
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 VIA_ENABLE = yes

keyboards/dztech/dz60rgb/keymaps/xunz/rules.mk

@@ -1,5 +1,4 @@
 NKRO_ENABLE = yes                 # USB Nkey Rollover
 # VELOCIKEY_ENABLE = yes
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
-
+LTO_ENABLE = yes

keyboards/dztech/dz65rgb/keymaps/chocol8/rules.mk

@@ -2,5 +2,4 @@ NKRO_ENABLE = yes            # USB Nkey Rollover
 VELOCIKEY_ENABLE = yes
 # AUTO_SHIFT_ENABLE = yes      # Auto Shift
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
-
+LTO_ENABLE = yes

keyboards/dztech/dz65rgb/keymaps/matthewrobo/rules.mk

@@ -2,5 +2,4 @@ NKRO_ENABLE = yes                 # USB Nkey Rollover
 AUTO_SHIFT_ENABLE = yes      # Auto Shift
 # VELOCIKEY_ENABLE = yes
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
-
+LTO_ENABLE = yes

keyboards/ergodox_ez/keymaps/hacker_dvorak/rules.mk

@@ -1,7 +1,7 @@
 # Set any rules.mk overrides for your specific keymap here.
 # See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 NKRO_ENABLE      = yes  # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 TAP_DANCE_ENABLE = yes
 MOUSEKEY_ENABLE  = yes  # Mouse keys(+4700b).

keyboards/ergodox_ez/keymaps/nathanvercaemert/rules.mk

@@ -1,6 +1,6 @@
 # Set any rules.mk overrides for your specific keymap here.
 # See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 COMMAND_ENABLE = no
 RGBLIGHT_ENABLE = no
 TAP_DANCE_ENABLE=yes

keyboards/flx/virgo/rules.mk

@@ -30,5 +30,4 @@ UNICODE_ENABLE = no          # Unicode
 BLUETOOTH_ENABLE = no        # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no            # Audio output on port C6
 FAUXCLICKY_ENABLE = no       # Use buzzer to emulate clicky switches
-LINK_TIME_OPTIMIZATION_ENABLE = yes
-
+LTO_ENABLE = yes

keyboards/gray_studio/think65/hotswap/rules.mk

@@ -32,7 +32,7 @@ AUDIO_ENABLE = no            # Audio output on port C6
 FAUXCLICKY_ENABLE = no       # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no          # Enable support for HD44780 based LCDs
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 LAYOUTS = 65_ansi_blocker
 

keyboards/gray_studio/think65/solder/rules.mk

@@ -32,7 +32,7 @@ AUDIO_ENABLE = no            # Audio output on port C6
 FAUXCLICKY_ENABLE = no       # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no          # Enable support for HD44780 based LCDs
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 LAYOUTS = 65_ansi_blocker
 

keyboards/handwired/promethium/rules.mk

@@ -45,4 +45,4 @@ SRC += rgbsps.c
 SRC += analog.c
 SRC += matrix.c
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/helix/pico/keymaps/biacco/rules.mk

@@ -7,7 +7,7 @@
 #
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 AUDIO_ENABLE = yes           # Audio output on port B5
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 6 Variables

keyboards/helix/pico/keymaps/default/rules.mk

@@ -7,7 +7,7 @@
 #
 EXTRAKEY_ENABLE = yes       # Audio control and System control
 AUDIO_ENABLE = yes          # Audio output on port B5
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 6 Variables

keyboards/helix/pico/keymaps/mtei/rules.mk

@@ -7,7 +7,7 @@
 #
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 AUDIO_ENABLE = yes          # Audio output on port B5
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 6 Variables

keyboards/helix/pico/local_features.mk

@@ -106,10 +106,10 @@ endif
 
 ifeq ($(strip $(AUDIO_ENABLE)),yes)
   ifeq ($(strip $(RGBLIGHT_ENABLE)),yes)
-    LINK_TIME_OPTIMIZATION_ENABLE = yes
+    LTO_ENABLE = yes
   endif
   ifeq ($(strip $(OLED_ENABLE)),yes)
-    LINK_TIME_OPTIMIZATION_ENABLE = yes
+    LTO_ENABLE = yes
   endif
 endif
 
@@ -120,7 +120,7 @@ ifneq ($(strip $(SHOW_HELIX_OPTIONS)),)
      $(info -- OLED_DRIVER_ENABLE = $(OLED_DRIVER_ENABLE))
      $(info -- CONSOLE_ENABLE     = $(CONSOLE_ENABLE))
      $(info -- OPT_DEFS           = $(OPT_DEFS))
-     $(info -- LINK_TIME_OPTIMIZATION_ENABLE = $(LINK_TIME_OPTIMIZATION_ENABLE))
+     $(info -- LTO_ENABLE = $(LTO_ENABLE))
      $(info )
   endif
 endif

keyboards/helix/rev2/keymaps/default/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/edvorakjp/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 TAP_DANCE_ENABLE = yes
 
 # Helix Spacific Build Options

keyboards/helix/rev2/keymaps/five_rows/rules.mk

@@ -11,7 +11,7 @@
  #      yes, no  +1500
  #      yes, yes +3200
  #      no,  yes +400
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/five_rows_jis/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/froggy/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/froggy_106/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/led_test/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/keymaps/yshrsmz/rules.mk

@@ -5,7 +5,7 @@
 #   See TOP/keyboards/helix/rules.mk for a list of options that can be set.
 #   See TOP/docs/config_options.md for more information.
 #
-LINK_TIME_OPTIMIZATION_ENABLE = no  # if firmware size over limit, try this option
+LTO_ENABLE = no  # if firmware size over limit, try this option
 
 # Helix Spacific Build Options
 # you can uncomment and edit follows 7 Variables

keyboards/helix/rev2/local_features.mk

@@ -119,7 +119,7 @@ ifneq ($(strip $(SHOW_HELIX_OPTIONS)),)
      $(info -- OLED_DRIVER_ENABLE = $(OLED_DRIVER_ENABLE))
      $(info -- CONSOLE_ENABLE     = $(CONSOLE_ENABLE))
      $(info -- OPT_DEFS           = $(OPT_DEFS))
-     $(info -- LINK_TIME_OPTIMIZATION_ENABLE = $(LINK_TIME_OPTIMIZATION_ENABLE))
+     $(info -- LTO_ENABLE = $(LTO_ENABLE))
      $(info )
   endif
 endif

keyboards/hineybush/h88/rules.mk

@@ -30,4 +30,4 @@ UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/hotdox/keymaps/ninjonas/rules.mk

@@ -1 +1 @@
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/id80/keymaps/via/rules.mk

@@ -1,2 +1,2 @@
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 VIA_ENABLE = yes

keyboards/kc60/keymaps/noroadsleft/rules.mk

@@ -1,6 +1,6 @@
 # https://github.com/qmk/qmk_firmware/issues/3448#issuecomment-406636125
 # EXTRAFLAGS        += -flto
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 MOUSEKEY_ENABLE = no        # Mouse keys
 # COMMAND_ENABLE = no         # Commands for debug and configuration

keyboards/keebio/bdn9/keymaps/via/rules.mk

@@ -1,5 +1,5 @@
 VIA_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 MOUSEKEY_ENABLE = yes
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = no

keyboards/keebio/iris/keymaps/pvinis/rules.mk

@@ -4,6 +4,6 @@ RGBLIGHT_ENABLE  = yes  # rgb leds underlight
 ENCODER_ENABLE   = yes  # rotary knob
 
 # Some extra stuff to make firmware smaller.
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = no

keyboards/keebio/iris/keymaps/via/rules.mk

@@ -1,2 +1,2 @@
 VIA_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/keebio/quefrency/keymaps/drashna_ms/rules.mk

@@ -1,4 +1,4 @@
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 EXTRAKEY_ENABLE = yes
 AUDIO_ENABLE = yes

keyboards/keebio/quefrency/keymaps/via/rules.mk

@@ -1,3 +1,3 @@
 VIA_ENABLE = yes
 CONSOLE_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/kyria/keymaps/ninjonas/rules.mk

@@ -1,6 +1,6 @@
 OLED_DRIVER_ENABLE = yes   # Enables the use of OLED displays
 ENCODER_ENABLE = yes       # Enables the use of one or more encoders
 RGBLIGHT_ENABLE = yes      # Enable keyboard RGB underglow
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
-SRC += oled.c
+SRC += oled.c

keyboards/kyria/rules.mk

@@ -31,6 +31,6 @@ AUDIO_ENABLE = no          # Audio output on port C6
 FAUXCLICKY_ENABLE = no     # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no        # Enable support for HD44780 based LCDs
 SPLIT_KEYBOARD = yes       # Split common
-LINK_TIME_OPTIMIZATION_ENABLE =yes 
+LTO_ENABLE = yes
 
 DEFAULT_FOLDER = kyria/rev1

keyboards/launchpad/keymaps/via/rules.mk

@@ -1,3 +1,3 @@
 VIA_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 RGBLIGHT_ENABLE = yes

keyboards/lily58/keymaps/ninjonas/rules.mk

@@ -1,2 +1,2 @@
 OLED_DRIVER_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/pinky/3/keymaps/ninjonas/rules.mk

@@ -1,2 +1,2 @@
 MOUSEKEY_ENABLE = no
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/planck/keymaps/oryx/rules.mk

@@ -1,6 +1,6 @@
 SRC += muse.c
 # Set any rules.mk overrides for your specific keymap here.
 # See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 COMMAND_ENABLE = no
 MOUSEKEY_ENABLE = no

keyboards/planck/keymaps/sascha/rules.mk

@@ -1,7 +1,7 @@
 AUTO_SHIFT_ENABLE = yes
 AUTO_SHIFT_MODIFIERS = yes
 UNICODE_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 ifeq ($(strip $(KEYBOARD)), planck/rev5)
 BACKLIGHT_ENABLE = yes

keyboards/planck/keymaps/tylerwince/rules.mk

@@ -1,7 +1,7 @@
 SRC += muse.c
 # Set any rules.mk overrides for your specific keymap here.
 # See rules at https://docs.qmk.fm/#/config_options?id=the-rulesmk-file
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 COMMAND_ENABLE = no
 MOUSEKEY_ENABLE = no
 TAP_DANCE_ENABLE=yes

keyboards/preonic/rev1/rules.mk

@@ -34,4 +34,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 LAYOUTS = ortho_5x12
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/preonic/rev2/rules.mk

@@ -34,4 +34,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 LAYOUTS = ortho_5x12
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/rgbkb/sol/keymaps/kageurufu/rules.mk

@@ -11,11 +11,10 @@ LED_MIRRORED            = no        # Mirror LEDs across halves (enable DIP 1 on
 RGB_MATRIX_ENABLE       = WS2812    # Enable per-key coordinate based RGB effects. Do not enable with RGBlight
 
 # Userspace implements their own LTO
-LINK_TIME_OPTIMIZATION_ENABLE = no
+LTO_ENABLE = no
 
 
 
 # Do not edit past here
 
 include keyboards/$(KEYBOARD)/post_rules.mk
-

keyboards/rgbkb/sol/rev2/rules.mk

@@ -29,7 +29,7 @@ IOS_DEVICE_ENABLE       = no        # Limit max brightness to connect to IOS dev
 OLED_DRIVER_ENABLE      = no        # Enable the OLED Driver
 EXTRA_ENCODERS_ENABLE   = no        # Enables 3 encoders per side (up from 1, not compatible with OLED_DRIVER_ENABLE)
 SWAP_HANDS_ENABLE       = no        # Enable one-hand typing
-LINK_TIME_OPTIMIZATION_ENABLE = yes # Enable Link Time Optimizations greatly reducing firmware size by disabling the old Macros and Functions features
+LTO_ENABLE = yes # Enable Link Time Optimizations greatly reducing firmware size by disabling the old Macros and Functions features
 
 # Special RGB Matrix, OLED, & Encoder Control Menu!
 RGB_OLED_MENU           = no        # Enabled by setting this to the encoder index (0-5) you wish to use to control the menu.

keyboards/rgbkb/zygomorph/keymaps/5x6pad/rules.mk

@@ -19,7 +19,7 @@ SWAP_HANDS_ENABLE = no      # Enable one-hand typing
 ENCODER_ENABLE = yes        # Enable rotary encoder
 OLED_DRIVER_ENABLE = no     # Enable the OLED Driver
 IOS_DEVICE_ENABLE = no      # Limit max brightness to connect to IOS device (iPad,iPhone)
-LINK_TIME_OPTIMIZATION_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
+LTO_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
 
 # Do not edit past here
 

keyboards/rgbkb/zygomorph/keymaps/default/rules.mk

@@ -19,7 +19,7 @@ SWAP_HANDS_ENABLE = no      # Enable one-hand typing
 ENCODER_ENABLE = yes        # Enable rotary encoder
 OLED_DRIVER_ENABLE = no     # Enable the OLED Driver
 IOS_DEVICE_ENABLE = no      # Limit max brightness to connect to IOS device (iPad,iPhone)
-LINK_TIME_OPTIMIZATION_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
+LTO_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
 
 # Do not edit past here
 

keyboards/rgbkb/zygomorph/keymaps/default_oled/rules.mk

@@ -19,7 +19,7 @@ SWAP_HANDS_ENABLE = no      # Enable one-hand typing
 ENCODER_ENABLE = yes        # Enable rotary encoder
 OLED_DRIVER_ENABLE = yes    # Enable the OLED Driver
 IOS_DEVICE_ENABLE = no      # Limit max brightness to connect to IOS device (iPad,iPhone)
-LINK_TIME_OPTIMIZATION_ENABLE = yes     # Enable optimizations to reduce firmware size. Also disables action macros and functions.
+LTO_ENABLE = yes     # Enable optimizations to reduce firmware size. Also disables action macros and functions.
 
 # Do not edit past here
 

keyboards/rgbkb/zygomorph/keymaps/xulkal/rules.mk

@@ -19,7 +19,7 @@ SWAP_HANDS_ENABLE = no      # Enable one-hand typing
 ENCODER_ENABLE = no         # Enable rotary encoder
 OLED_DRIVER_ENABLE = no     # Enable the OLED Driver
 IOS_DEVICE_ENABLE = no      # Limit max brightness to connect to IOS device (iPad,iPhone)
-LINK_TIME_OPTIMIZATION_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
+LTO_ENABLE = no      # Enable optimizations to reduce firmware size. Also disables action macros and functions.
 
 # Do not edit past here
 

keyboards/tg4x/rules.mk

@@ -31,4 +31,4 @@ AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/tkc/candybar/lefty/rules.mk

@@ -5,7 +5,7 @@ MCU = STM32F072
 #   comment out to disable the options.
 #
 # EXTRAFLAGS+=-flto
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 BACKLIGHT_ENABLE = no
 BOOTMAGIC_ENABLE = lite  # Virtual DIP switch configuration
 ## (Note that for BOOTMAGIC on Teensy LC you have to use a custom .ld script.)

keyboards/tkc/candybar/righty/rules.mk

@@ -5,7 +5,7 @@ MCU = STM32F072
 #   comment out to disable the options.
 #
 # EXTRAFLAGS+=-flto
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 BACKLIGHT_ENABLE = no
 BOOTMAGIC_ENABLE = lite  # Virtual DIP switch configuration
 ## (Note that for BOOTMAGIC on Teensy LC you have to use a custom .ld script.)

keyboards/v60_type_r/rules.mk

@@ -32,6 +32,6 @@ BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 LAYOUTS = 60_ansi 60_iso

keyboards/vitamins_included/rules.mk

@@ -25,4 +25,4 @@ LAYOUTS = ortho_4x12
 
 DEFAULT_FOLDER = vitamins_included/rev2
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes

keyboards/xd004/v1/config.h

@@ -75,6 +75,6 @@ further optimizations can be done on that side.
 
 /* disable action features */
 // #define NO_ACTION_ONESHOT // 462 bytes <- this needs to be un-commented out if Link Time Optimization is disabled, otherwise file is too large
-// The two below are implicit since we use LINK_TIME_OPTIMIZATION_ENABLE (in rules.mk)
+// The two below are implicit since we use LTO_ENABLE (in rules.mk)
 // #define NO_ACTION_MACRO
 // #define NO_ACTION_FUNCTION

keyboards/xd004/v1/rules.mk

@@ -27,6 +27,6 @@ RGBLIGHT_ENABLE = no        # Enable WS2812 RGB underlight.
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 SPACE_CADET_ENABLE = no
 # Saves about 5% of space:
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 #LAYOUTS = ortho_1x4

keyboards/xd84/rules.mk

@@ -31,7 +31,7 @@ BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # custom matrix setup
 CUSTOM_MATRIX = lite

keyboards/xd96/rules.mk

@@ -31,7 +31,7 @@ BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # custom matrix setup
 CUSTOM_MATRIX = lite

keyboards/yushakobo/quick7/config.h

@@ -192,7 +192,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_ONESHOT
 
 /* disable these deprecated features by default */
-#ifndef LINK_TIME_OPTIMIZATION_ENABLE
+#ifndef LTO_ENABLE
   #define NO_ACTION_MACRO
   #define NO_ACTION_FUNCTION
 #endif

show_options.mk

@@ -82,8 +82,7 @@ OTHER_OPTION_NAMES = \
   RGB_MATRIX_KEYPRESSES \
   LED_MIRRORED \
   RGBLIGHT_FULL_POWER \
-  Link_Time_Optimization \
-  LINK_TIME_OPTIMIZATION_ENABLE
+  LTO_ENABLE
 
 define NAME_ECHO
 	@echo "  $1 = $($1)		# $(origin $1)"

tmk_core/common.mk

@@ -160,16 +160,13 @@ ifeq ($(strip $(SHARED_EP_ENABLE)), yes)
 endif
 
 ifeq ($(strip $(LTO_ENABLE)), yes)
-    LINK_TIME_OPTIMIZATION_ENABLE = yes
-endif
-
-ifeq ($(strip $(LINK_TIME_OPTIMIZATION_ENABLE)), yes)
     ifeq ($(PLATFORM),CHIBIOS)
         $(info Enabling LTO on ChibiOS-targeting boards is known to have a high likelihood of failure.)
-        $(info If unsure, set LINK_TIME_OPTIMIZATION_ENABLE = no.)
+        $(info If unsure, set LTO_ENABLE = no.)
     endif
     EXTRAFLAGS += -flto
-    TMK_COMMON_DEFS += -DLINK_TIME_OPTIMIZATION_ENABLE
+    TMK_COMMON_DEFS += -DLTO_ENABLE
+    TMK_COMMON_DEFS += -DLINK_TIME_OPTIMIZATON_ENABLE
 endif
 
 # Search Path

tmk_core/common/action.h

@@ -29,7 +29,7 @@ extern "C" {
 #endif
 
 /* Disable macro and function features when LTO is enabled, since they break */
-#ifdef LINK_TIME_OPTIMIZATION_ENABLE
+#ifdef LTO_ENABLE
 #    ifndef NO_ACTION_MACRO
 #        define NO_ACTION_MACRO
 #    endif

tmk_core/common/command.c

@@ -180,7 +180,7 @@ static void print_version(void) {
 #ifdef NKRO_ENABLE
           " NKRO"
 #endif
-#ifdef LINK_TIME_OPTIMIZATION_ENABLE
+#ifdef LTO_ENABLE
           " LTO"
 #endif
 

users/bcat/rules.mk

@@ -14,7 +14,7 @@ EXTRAKEY_ENABLE = yes
 NKRO_ENABLE = yes
 
 # Enable link-time optimization to reduce binary size.
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # Disable unused build options on all keyboards.
 COMMAND_ENABLE = no

users/dshields/rules.mk

@@ -10,7 +10,7 @@ SPACE_CADET_ENABLE    = no
 LEADER_ENABLE         = no
 DYNAMIC_MACRO_ENABLE  = yes
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 ifeq ($(strip $(KEYBOARD)), planck/rev3)
 	AUDIO_ENABLE	  = no
@@ -29,4 +29,3 @@ ifeq ($(strip $(KEYBOARD)), planck/light)
 	BACKLIGHT_ENABLE  = no
 	RGB_MATRIX_ENABLE = yes
 endif
-

users/issmirnov/rules.mk

@@ -4,7 +4,7 @@ SRC += issmirnov.c
 
 # https://www.reddit.com/r/olkb/comments/bmpgjm/programming_help/
 # Should shave 2000 bytes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 
 # Enable debugging only when needed.
 CONSOLE_ENABLE = yes # +400 bytes (hid_listen support)

users/kuchosauronad0/rules.mk

@@ -1,7 +1,7 @@
 SRC += kuchosauronad0.c \
 	   process_records.c
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 SPACE_CADET_ENABLE            = no
 
 ifneq ($(strip $(RGBLIGHT_ENABLE)),yes )
@@ -24,7 +24,7 @@ ifeq ($(strip $(LEADER_ENABLE)), yes)
      SRC += leader.c
 endif
 
-ifneq ("$(wildcard $(USER_PATH)/secrets.c)","") 
+ifneq ("$(wildcard $(USER_PATH)/secrets.c)","")
      SRC += secrets.c
 endif
 ifeq ($(strip $(NO_SECRETS)), yes)

users/pvinis/rules.mk

@@ -14,6 +14,6 @@ SRC += pvinis.c # add userspace file
 
 ## Some extra stuff to make firmware smaller.
 
-# LINK_TIME_OPTIMIZATION_ENABLE = yes
+# LTO_ENABLE = yes
 # CONSOLE_ENABLE = no
 # COMMAND_ENABLE = no

users/yanfali/rules.mk

@@ -2,7 +2,7 @@ BOOTMAGIC = lite
 DYNAMIC_KEYMAP_ENABLE = no
 CONSOLE_ENABLE = yes
 COMMAND_ENABLE = yes
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 AUDIO_ENABLE = no
 
 # only enable audio on specific boards

users/yet-another-developer/rules.mk

@@ -1,7 +1,7 @@
 SRC += yet-another-developer.c \
        process_records.c
 
-LINK_TIME_OPTIMIZATION_ENABLE = yes
+LTO_ENABLE = yes
 SPACE_CADET_ENABLE            = no
 
 ifeq ($(strip $(TAP_DANCE_ENABLE)), yes)