From 995d50998c42efeaef0095769178ac061e25cf3c Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Fri, 5 May 2023 18:23:01 +0200
Subject: try different compiler flags

---
 zumo/makefile | 43 ++++++++++++++++++++++++++++++++++---------
 1 file changed, 34 insertions(+), 9 deletions(-)

(limited to 'zumo/makefile')

diff --git a/zumo/makefile b/zumo/makefile
index c388a28..08c01d7 100644
--- a/zumo/makefile
+++ b/zumo/makefile
@@ -2,33 +2,58 @@ PORT = /dev/ttyUSB0
 
 C++ = avr-g++
 CC = avr-gcc
-LD = avr-ld
+LD = avr-gcc
 RM = rm -f
 
 MCU = atmega32u4
 TARGET = main
 SRCS += main.cpp
 
-CFLAGS += -mcall-prologues
-CFLAGS += -mmcu=$(MCU)
-CFLAGS += -Os
-CFLAGS += -g
-CFLAGS += -Wl,-gc-sections
-CFLAGS += -Wl,-relax
+C_CPP_FLAGS += -mmcu=$(MCU)
+C_CPP_FLAGS += -Wl,-gc-sections
+SHARED_FLAGS += -Os
+
+C_CPP_FLAGS += -mcall-prologues
+C_CPP_FLAGS += -g
+C_CPP_FLAGS += -Wl,-relax
+C_CPP_FLAGS += -MMD
+C_CPP_FLAGS += -ffunction-sections
+C_CPP_FLAGS += -fdata-sections
+
+LFLAGS += -flto
+LFLAGS += -fuse-linker-plugin
+LFLAGS += -lc -lm
+# LFLAGS += -L/usr/avr/lib/avr5/ -L/usr/lib/gcc/avr/12.2.0/avr5 -lgcc -lm -lc -latmega32u4
+# LFLAGS += -flto -fuse-linker-plugin -mmcu=atmega32u4 -Wl,--gc-sections -Os -lc -lm
+
+
+CFLAGS += -fno-fat-lto-objects
+# CFLAGS += -std=gnu11
+
+CPPFLAGS += -fpermissive
+CPPFLAGS += -fno-exceptions
+CPPFLAGS += -fno-threadsafe-statics
+CPPFLAGS += -fno-devirtualize
+# CPPFLAGS += -std=gnu++11
+
+
+LFLAGS += $(SHARED_FLAGS)
+CFLAGS += $(C_CPP_FLAGS) $(SHARED_FLAGS)
+CPPFLAGS += $(C_CPP_FLAGS) $(SHARED_FLAGS)
 
 include zumo.mk
 
 OBJS := $(patsubst %.c,%.o, $(SRCS))
 OBJS := $(patsubst %.cpp,%.o, $(OBJS))
 
-MAKEFLAGS += -j4
+MAKEFLAGS += -j
 
 .PHONY: all clean flash
 
 all: $(TARGET).hex
 
 %.o: %.cpp
-	$(C++) $(CFLAGS) -o $@ -c $<
+	$(C++) $(CPPFLAGS) -o $@ -c $<
 
 %.o: %.c
 	$(CC) $(CFLAGS) -o $@ -c $<
-- 
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