altos: Use -ffunction-sections -fdata-sections

This allows the linker to discard unused functions.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/Makefile.defs b/src/Makefile.defs
index d9b719973da61e5c52fabe871d8b3111318b7630..f9387b07184af04a7955f8237e58fcc5a3943e67 100644 (file)
--- a/src/Makefile.defs
+++ b/src/Makefile.defs
@@ -23,6 +23,7 @@ OPT=-Os -Wl,-Map=$(PROGNAME)-$(VERSION).map
 
 PICOLIBC_CFLAGS= \
        -specs=picolibc.specs \
+       -Wl,--gc-sections -ffunction-sections -fdata-sections \
        $(PICOLIBC_PRINTF_CFLAGS)
 
 AO_CFLAGS=\