add config support

includes/tomlc17-R260618/test/merge/Makefile

@@ -0,0 +1,27 @@
+CFLAGS := -O0 -g -fsanitize=address,undefined -std=c17 -Wmissing-declarations -Wall -Wextra -MMD
+
+EXEC = test1
+
+all: $(EXEC)
+
+test1: test1.c
+	$(CC) $(CFLAGS) -o $@ $@.c
+
+test: all
+	@echo
+	@echo =========================
+	@echo == merge test
+	@echo =========================
+	./test1
+
+-include test1.d
+
+clean:
+	rm -f *.o *.d $(EXEC)
+
+distclean: clean
+
+format:
+	clang-format -i *.[ch]
+
+.PHONY: all clean distclean format test