diff options
| author | Stefan Kerkmann <karlk90@pm.me> | 2022-04-22 10:13:31 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-04-22 18:13:31 +1000 |
| commit | b1681fb6a11e6eb286bc93af3bcc59422e054eb8 (patch) | |
| tree | c1d41030249f2d187eca4f11281765ef9e78567f /platforms/avr | |
| parent | 68a3fe8347ff76e96075dab17cb9c4ac81ecf634 (diff) | |
| download | qmk_firmware-b1681fb6a11e6eb286bc93af3bcc59422e054eb8.tar.gz qmk_firmware-b1681fb6a11e6eb286bc93af3bcc59422e054eb8.zip | |
[Core] Allow usage of AVRs minimal printf library (#16266)
Co-authored-by: Sergey Vlasov <sigprof@gmail.com>
Diffstat (limited to 'platforms/avr')
| -rw-r--r-- | platforms/avr/platform.mk | 9 |
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) |