From 19f3e27cd64c3ff7ad8656072578867fb919f8d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Wed, 21 Jul 2021 23:30:49 +0200
Subject: [PATCH] make: allow multiple source files

---
 Makefile | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 956190e..063aec6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,21 @@
 CC := sdcc
 CFLAGS := -mstm8 --std-c99 --opt-code-size --Werror
+LDFLAGS = -mstm8 --out-fmt-ihx -lstm8
 FIRMWARE := main
+SRC_FILES := $(wildcard *.c)
+OBJ_FILES := $(patsubst %.c,%.rel,$(SRC_FILES))
 
 all: $(FIRMWARE).ihx
 
-%.ihx: %.c stm8s.h
-	$(CC) $(CFLAGS) --out-fmt-ihx $<
+$(FIRMWARE).ihx: $(OBJ_FILES)
+	$(CC) $(LDFLAGS) $^ -o $@
 	size $@
 
+%.rel: %.c %.h
+	$(CC) $(CFLAGS) --compile-only $<
+
 flash: $(FIRMWARE).ihx
 	stm8flash -c stlinkv2 -p stm8s103f3 -w $<
 
 clean:
-	rm -f $(FIRMWARE).asm $(FIRMWARE).ihx $(FIRMWARE).cdb $(FIRMWARE).lst $(FIRMWARE).map $(FIRMWARE).lk $(FIRMWARE).rel $(FIRMWARE).rst $(FIRMWARE).sym
+	rm -f $(FIRMWARE).asm $(FIRMWARE).ihx $(FIRMWARE).cdb $(FIRMWARE).lst $(FIRMWARE).map $(FIRMWARE).lk $(FIRMWARE).rel $(FIRMWARE).rst $(FIRMWARE).sym $(OBJ_FILES)