Move LTO logic from common.mk (#14973)

2 files changed, 9 insertions, 12 deletions

diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index f0faa2dc3..ce335f0d3 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -100,18 +100,6 @@ ifeq ($(strip $(SHARED_EP_ENABLE)), yes)
     TMK_COMMON_DEFS += -DSHARED_EP_ENABLE
 endif
 
-ifeq ($(strip $(LTO_ENABLE)), yes)
-    ifeq ($(PLATFORM),CHIBIOS)
-        $(info Enabling LTO on ChibiOS-targeting boards is known to have a high likelihood of failure.)
-        $(info If unsure, set LTO_ENABLE = no.)
-    endif
-    EXTRAFLAGS += -flto
-    TMK_COMMON_DEFS += -DLTO_ENABLE
-    TMK_COMMON_DEFS += -DLINK_TIME_OPTIMIZATON_ENABLE
-else ifdef LINK_TIME_OPTIMIZATION_ENABLE
-    $(error The LINK_TIME_OPTIMIZATION_ENABLE flag has been renamed to LTO_ENABLE.)
-endif
-
 # Search Path
 VPATH += $(TMK_PATH)/$(COMMON_DIR)
 VPATH += $(TMK_PATH)/$(PLATFORM_COMMON_DIR)
diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk
index 56a331e28..b17f85d37 100644
--- a/tmk_core/rules.mk
+++ b/tmk_core/rules.mk
@@ -82,6 +82,15 @@ endif
 #  -Wall...:     warning level
 #  -Wa,...:      tell GCC to pass this to the assembler.
 #    -adhlns...: create assembler listing
+ifeq ($(strip $(LTO_ENABLE)), yes)
+    ifeq ($(PLATFORM),CHIBIOS)
+        $(info Enabling LTO on ChibiOS-targeting boards is known to have a high likelihood of failure.)
+        $(info If unsure, set LTO_ENABLE = no.)
+    endif
+    CDEFS += -flto
+    CDEFS += -DLTO_ENABLE
+endif
+
 DEBUG_ENABLE ?= yes
 ifeq ($(strip $(SKIP_DEBUG_INFO)),yes)
   DEBUG_ENABLE=no