diff options
| -rw-r--r-- | ports/stm32/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/ports/stm32/Makefile b/ports/stm32/Makefile index 7daf4df4a..99e2995ff 100644 --- a/ports/stm32/Makefile +++ b/ports/stm32/Makefile @@ -350,6 +350,11 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_USBDEV:.c=.o)) OBJ += $(addprefix $(BUILD)/, $(SRC_MOD:.c=.o)) OBJ += $(BUILD)/pins_$(BOARD).o +# This file contains performance critical functions so turn up the optimisation +# level. It doesn't add much to the code size and improves performance a bit. +# Don't use -O3 with this file because gcc tries to optimise memset in terms of itself. +$(BUILD)/lib/libc/string0.o: COPT += -O2 + # We put several files into the first 16K section with the ISRs. # If we compile these using -O0 then it won't fit. So if you really want these # to be compiled with -O0, then edit boards/common.ld (in the .isr_vector section) |