From b1681fb6a11e6eb286bc93af3bcc59422e054eb8 Mon Sep 17 00:00:00 2001 From: Stefan Kerkmann Date: Fri, 22 Apr 2022 10:13:31 +0200 Subject: [Core] Allow usage of AVRs minimal printf library (#16266) Co-authored-by: Sergey Vlasov --- platforms/avr/platform.mk | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'platforms') diff --git a/platforms/avr/platform.mk b/platforms/avr/platform.mk index 9f304d2e20..0374e2e058 100644 --- a/platforms/avr/platform.mk +++ b/platforms/avr/platform.mk @@ -37,6 +37,15 @@ CXXFLAGS += -fno-exceptions -std=c++11 LDFLAGS += -Wl,--gc-sections +# Use AVR's libc minimal printf implementation which has less features +# and thus can shave ~400 bytes. Usually we use the xprintf +# implementation but keyboards that use s(n)printf automatically +# pull in the AVR libc implementation, which is ~900 bytes heavy. +AVR_USE_MINIMAL_PRINTF ?= no +ifeq ($(strip $(AVR_USE_MINIMAL_PRINTF)), yes) + LDFLAGS += -Wl,--whole-archive -lprintf_min -Wl,--no-whole-archive +endif + OPT_DEFS += -DF_CPU=$(F_CPU)UL MCUFLAGS = -mmcu=$(MCU) -- cgit v1.2.3