From 6f85b2aaf27467f55f60fd1337edef69ad530a6f Mon Sep 17 00:00:00 2001
From: "Nicholas J. Kain" <nicholas@kain.us>
Date: Sun, 23 Jan 2022 18:31:04 -0500
Subject: [PATCH] Update Makefile to generate dependency info

---
 .gitignore |  2 ++
 Makefile   | 14 ++++++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/.gitignore b/.gitignore
index d78c7cd..5615e17 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *.o
 nk/*.o
+*.d
+nk/*.d
 ndhc
diff --git a/Makefile b/Makefile
index b706a4b..71e6dcd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,20 @@
-NDHC_SRCS = $(sort $(wildcard *.c) $(wildcard nk/*.c)) ifchd-parse.c cfg.c
+NDHC_SRCS = $(sort $(wildcard *.c) $(wildcard nk/*.c) ifchd-parse.c cfg.c)
 NDHC_OBJS = $(NDHC_SRCS:.c=.o)
+NDHC_DEP = $(NDHC_SRCS:.c=.d)
 INCL = -I.
 
 CC ?= gcc
-CFLAGS = -O2 -s -std=gnu99 -pedantic -Wall -Wextra -Wimplicit-fallthrough=0 -Wformat=2 -Wformat-nonliteral -Wformat-security -Wshadow -Wpointer-arith -Wmissing-prototypes -Wunused-const-variable=0 -Wcast-qual -Wsign-conversion -D_GNU_SOURCE -DNK_USE_CAPABILITY -Wno-discarded-qualifiers
+CFLAGS = -MMD -O2 -s -std=gnu99 -pedantic -Wall -Wextra -Wimplicit-fallthrough=0 -Wformat=2 -Wformat-nonliteral -Wformat-security -Wshadow -Wpointer-arith -Wmissing-prototypes -Wunused-const-variable=0 -Wcast-qual -Wsign-conversion -D_GNU_SOURCE -DNK_USE_CAPABILITY -Wno-discarded-qualifiers
+
+-include $(NDHC_DEP)
 
 all: ragel ndhc
 
 clean:
-	rm -i *.o nk/*.o ndhc
+	rm -f $(NDHC_OBJS) $(NDHC_DEP) ndhc
+
+cleanragel:
+	rm -f ifchd-parse.c cfg.c
 
 ifchd-parse.c:
 	ragel -G2 -o ifchd-parse.c ifchd-parse.rl
@@ -24,5 +30,5 @@ ragel: ifchd-parse.c cfg.c
 ndhc: $(NDHC_OBJS)
 	$(CC) $(CFLAGS) $(INCL) -o $@ $^
 
-.PHONY: all clean
+.PHONY: all clean cleanragel