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

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)