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| author | Ayke van Laethem <aykevanlaethem@gmail.com> | 2018-02-18 19:20:52 +0100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2018-07-18 17:12:25 +1000 |
| commit | 3cdecf90e685d08ae2239fc80591fd96aa55610a (patch) | |
| tree | e4786ebfc315a4c89ff8f8607e5fffcc6bb08f6b | |
| parent | c486127378e3eb977f45f335eafedd908cb2cf0c (diff) | |
nrf: Make LTO configurable via Makefile flag.
LTO messes up debuggability and may cause some other issues.
Additionally, it does not always result in reduced code size.
| -rw-r--r-- | ports/nrf/Makefile | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile index 99dd60e82..680a7884b 100644 --- a/ports/nrf/Makefile +++ b/ports/nrf/Makefile @@ -69,6 +69,13 @@ CFLAGS_MCU_m4 = $(CFLAGS_CORTEX_M) -mtune=cortex-m4 -mcpu=cortex-m4 -mfpu=fpv4-s CFLAGS_MCU_m0 = $(CFLAGS_CORTEX_M) --short-enums -mtune=cortex-m0 -mcpu=cortex-m0 -mfloat-abi=soft -fno-builtin +LTO ?= 1 +ifeq ($(LTO),1) +CFLAGS_LTO += -flto +else +CFLAGS_LTO += -Wl,--gc-sections -ffunction-sections -fdata-sections +endif + CFLAGS += $(CFLAGS_MCU_$(MCU_SERIES)) CFLAGS += $(INC) -Wall -Werror -ansi -std=gnu99 -nostdlib $(COPT) $(NRF_DEFINES) $(CFLAGS_MOD) @@ -76,7 +83,7 @@ CFLAGS += -fno-strict-aliasing CFLAGS += -fstack-usage CFLAGS += -Iboards/$(BOARD) CFLAGS += -DNRF5_HAL_H='<$(MCU_VARIANT)_hal.h>' -CFLAGS += -flto +CFLAGS += $(CFLAGS_LTO) LDFLAGS = $(CFLAGS) LDFLAGS += -Xlinker -Map=$(@:.elf=.map) |