优化适用于Raspberry Pi 4 B

Makefile

@@ -1,12 +1,22 @@
-CROSS_COMPILE ?= 
+CROSS_COMPILE ?=
 CC := $(CROSS_COMPILE)gcc
-CFLAGS += -Wall -Os -g -L../libini -I../libini -fno-builtin
-LIB += -Wl,-rpath,/root/libini/ ../libini/libini.so
+CFLAGS += -Wall -Os -g -I../libini -fno-builtin
+# 只链接静态库，不使用系统动态库
+LDFLAGS += -static -L../libini
+LIBS += ../libini/libini.a
 BIN = boot
 
-all: reboot_temperature.o
-	$(CC) $(CFLAGS) $^ -o $(BIN) $(LIB)
+all: libini $(BIN)
+
+libini:
+	$(MAKE) -C ../libini CC=$(CC)
+
+reboot_temperature.o: reboot_temperature.c reboot_temperature.h
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(BIN): reboot_temperature.o
+	$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS) $(LIBS)
 
 clean:
-	rm -rf *.o
-	rm $(BIN)
+	rm -f *.o $(BIN)
+	$(MAKE) -C ../libini clean