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nrf: Make LTO configurable via Makefile flag.

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LTO messes up debuggability and may cause some other issues.
Additionally, it does not always result in reduced code size.
This commit is contained in:
Ayke van Laethem
2018-02-18 19:20:52 +01:00
committed by Damien George
parent c486127378
commit 3cdecf90e6
1 changed files with 8 additions and 1 deletions
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9
ports/nrf/Makefile
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@@ -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)