From 78169356c43054bd2493ab6bf1bb24a254d8ebb7 Mon Sep 17 00:00:00 2001
From: yinjiaji <yinjiaji@egova.com.cn>
Date: Wed, 29 Jul 2026 17:52:59 +0800
Subject: [PATCH] Makefile: do not compile headers as source files

Passing ttyclock.h to the compiler makes clang treat it as a separate translation unit, which fails when a single output is requested:

clang: error: cannot specify -o when generating multiple output files

Keep the header as a rebuild dependency while compiling only ttyclock.c.
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 9428506..a485bd8 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,8 @@
 #Under BSD License
 #See clock.c for the license detail.
 
-SRC = ttyclock.c ttyclock.h
+SRC = ttyclock.c
+HEADERS = ttyclock.h
 CC ?= gcc
 BIN ?= tty-clock
 PREFIX ?= /usr/local
@@ -26,7 +27,7 @@ else
 	LDFLAGS += $$(pkg-config --libs ncurses)
 endif
 
-tty-clock : ${SRC}
+tty-clock : ${SRC} ${HEADERS}
 
 	@echo "building ${SRC}"
 	${CC} ${CFLAGS} ${SRC} -o ${BIN} ${LDFLAGS}