From e43c5e6f856ad583579384e1f9509f66e3e0537e Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sun, 20 Jun 2021 14:24:39 +0200
Subject: Add build deps to Makefile.

---
 Makefile | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 9b7e035..4b43083 100644
--- a/Makefile
+++ b/Makefile
@@ -11,10 +11,15 @@ SRC = \
 
 OBJ = $(patsubst %.cc,%.o,$(SRC))
 
+DEPFILES := $(patsubst %.cc,%.d,$(SRC))
+$(DEPFILES):
+
+include $(wildcard $(DEPFILES))
+
 CXXFLAGS = -g -O3 -std=c++17 -I.
 
 %.o: %.cc
-	g++ $(CXXFLAGS) -c $< -o $@
+	g++ -MMD $(CXXFLAGS) -c $< -o $@
 
 libcppbuild.a: $(OBJ)
 	ar rcs $@ $(OBJ)
@@ -23,4 +28,4 @@ cppbuild: cppbuild.cc subdir/cppbuild.cc libcppbuild.a
 	g++ $(CXXFLAGS) -pthread cppbuild.cc subdir/cppbuild.cc libcppbuild.a -o $@
 
 clean:
-	rm -f libcppbuild.a $(OBJ) cppbuild
+	rm -f libcppbuild.a $(OBJ) cppbuild $(DEPFILES)
-- 
cgit v1.2.3