diff options
Diffstat (limited to 'tmk_core/rules.mk')
| -rw-r--r-- | tmk_core/rules.mk | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk index 5a629d1eb0..70ab0eb166 100644 --- a/tmk_core/rules.mk +++ b/tmk_core/rules.mk @@ -69,8 +69,11 @@ CSTANDARD = -std=gnu99 #CXXDEFS += -D__STDC_CONSTANT_MACROS #CXXDEFS += - - +# Speed up recompilations by opt-in usage of ccache +USE_CCACHE ?= no +ifneq ($(USE_CCACHE),no) + CC_PREFIX ?= ccache +endif #---------------- Compiler Options C ---------------- # -g*: generate debugging information @@ -79,6 +82,15 @@ CSTANDARD = -std=gnu99 # -Wall...: warning level # -Wa,...: tell GCC to pass this to the assembler. # -adhlns...: create assembler listing +ifeq ($(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 @@ -347,7 +359,7 @@ BEGIN = gccversion sizebefore # Note the obj.txt depeendency is there to force linking if a source file is deleted %.elf: $(OBJ) $(MASTER_OUTPUT)/cflags.txt $(MASTER_OUTPUT)/ldflags.txt $(MASTER_OUTPUT)/obj.txt | $(BEGIN) @$(SILENT) || printf "$(MSG_LINKING) $@" | $(AWK_CMD) - $(eval CMD=$(CC) $(ALL_CFLAGS) $(filter-out %.txt,$^) --output $@ $(LDFLAGS)) + $(eval CMD=MAKE=$(MAKE) $(CC) $(ALL_CFLAGS) $(filter-out %.txt,$^) --output $@ $(LDFLAGS)) @$(BUILD_CMD) |