Merge pull request #44 from zsa/enable_lto_option

Add option to enable LTO easily (qmk#5674)
zsa · May 6, 2019 · 43aae47 · 43aae47
2 parents 3c5dd58 + c7d9b48
commit 43aae47
Show file tree

Hide file tree

Showing 3 changed files with 11 additions and 2 deletions.
diff --git 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 
diff --git 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)"

diff --git 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)