[Core] Squeeze AVR some more with `-mrelax` and `-mcall-prologues` (#16269)

2022-02-27 04:05:03 +01:00 · 2022-02-27 04:05:03 +01:00 · 156f0561f2
parent cb8528c33c
commit 156f0561f2
1 changed files with 8 additions and 1 deletions
--- a/platforms/avr/platform.mk
+++ b/platforms/avr/platform.mk
@ -18,6 +18,13 @@ COMPILEFLAGS += -ffunction-sections
 COMPILEFLAGS += -fdata-sections
 COMPILEFLAGS += -fpack-struct
 COMPILEFLAGS += -fshort-enums
+COMPILEFLAGS += -mcall-prologues
+
+# Linker relaxation is only possible if
+# link time optimizations are not enabled.
+ifeq ($(strip $(LTO_ENABLE)), no)
+	COMPILEFLAGS += -mrelax
+endif

 ASFLAGS += $(AVR_ASFLAGS)