Merge pull request #44 from zsa/enable_lto_option

Add option to enable LTO easily (#5674)
5 years ago · 43aae47b38
parent 3c5dd583e1 c7d9b48cc9
commit 43aae47b38
3 changed files with 11 additions and 2 deletions
--- a/changelog.md
+++ b/changelog.md
@ -13,4 +13,5 @@
 04-22-2019 - Add Split RGB support  
 04-24-2019 - fix LIB_SRC and QUANTUM_LIB_SRC for ARM  
 04-24-2019 - Add RGB Split fixes and RGB Names  
-05-05-2019 - Fix issue with Space Cadet
+05-05-2019 - Add `LINK_TIME_OPTIMIZATION_ENABLE` to enable LTO and disable problematic features that cause LTO to fail  
+05-05-2019 - Fix issue with Space Cadet  
--- a/show_options.mk
+++ b/show_options.mk
@ -88,7 +88,8 @@ OTHER_OPTION_NAMES = \
  RGB_MATRIX_KEYPRESSES \
  LED_MIRRORED \
  RGBLIGHT_FULL_POWER \
-  Link_Time_Optimization
+  Link_Time_Optimization \
+  LINK_TIME_OPTIMIZATION_ENABLE

 define NAME_ECHO
 	@echo "  $1 = $($1)		# $(origin $1)"
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@ -208,6 +208,13 @@ ifeq ($(strip $(SHARED_EP_ENABLE)), yes)
    TMK_COMMON_DEFS += -DSHARED_EP_ENABLE
 endif

+
+ifeq ($(strip $(LINK_TIME_OPTIMIZATION_ENABLE)), yes)
+    EXTRAFLAGS += -flto
+    TMK_COMMON_DEFS += -DLINK_TIME_OPTIMIZATION_ENABLE
+    TMK_COMMON_DEFS += -DNO_ACTION_MACRO
+    TMK_COMMON_DEFS += -DNO_ACTION_FUNCTION
+endif
 # Bootloader address
 ifdef STM32_BOOTLOADER_ADDRESS
    TMK_COMMON_DEFS += -DSTM32_BOOTLOADER_ADDRESS=$(STM32_BOOTLOADER_ADDRESS)