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nrf/Makefile: Enable LTO by default only on newer gcc.

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Older gcc/binutils linker does not support lto with wrap.

Signed-off-by: Andrew Leech <andrew@alelec.net>
This commit is contained in:
Andrew Leech 2024-06-05 12:01:12 +10:00 committed by Damien George
parent 56c1617384
commit 62e0fa04a7
1 changed files with 8 additions and 0 deletions
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8
ports/nrf/Makefile
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@ -129,7 +129,15 @@ CFLAGS_MCU_m4 = $(CFLAGS_CORTEX_M) -mtune=cortex-m4 -mcpu=cortex-m4 -mfpu=fpv4-s
CFLAGS_MCU_m0 = $(CFLAGS_CORTEX_M) -fshort-enums -mtune=cortex-m0 -mcpu=cortex-m0 -mfloat-abi=soft
# linker wrap does not work with lto on older gcc/binutils: https://sourceware.org/bugzilla/show_bug.cgi?id=24406
GCC_VERSION = $(shell arm-none-eabi-gcc --version | sed -n -E 's:^arm.*([0-9]+\.[0-9]+\.[0-9]+).*$$:\1:p')
GCC_MAJOR_VERS = $(word 1,$(subst ., ,$(GCC_VERSION)))
ifeq ($(shell test $(GCC_MAJOR_VERS) -ge 10; echo $$?),0)
LTO ?= 1
else
LTO ?= 0
endif
ifeq ($(LTO),1)
CFLAGS += -flto
else