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-rw-r--r--platforms/avr/platform.mk9
1 files changed, 9 insertions, 0 deletions
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)