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| author | Damien George <damien.p.george@gmail.com> | 2018-05-04 15:53:51 +1000 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-05-04 15:53:51 +1000 |
| commit | aea71dbde0d7bc31d9ac40ee1905c884fbf7b0de (patch) | |
| tree | 489be8a87be60f751931e1a6d7c39251032b3bb0 | |
| parent | cb3456ddfe330c562b7d7dde64df933ab7d987f1 (diff) | |
stm32/Makefile: Use -O2 to optimise compilation of lib/libc/string0.c.
| -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) |