From 3e3f4a1c4cbaa3aa8bbaec888df3f96b896d3b36 Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Sun, 15 Jul 2018 21:42:36 +0200
Subject: [PATCH] Header deps compilation

---
 Makefile | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index d22070f..861baf0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+# Used to generated .d file that deal with header dependencies
+CPPFLAGS = -MMD
 AS=nasm
 ASFLAGS += -f elf32
 LDFLAGS += -m32 -nostdlib -static -fno-common -fno-use-cxa-atexit -fno-exceptions -fno-non-call-exceptions -fno-weak -fno-rtti -fno-stack-protector
@@ -9,6 +11,7 @@ asmsrc=$(wildcard *.asm)
 asmobj=$(asmsrc:%.asm=%.o)
 csrc=$(wildcard *.c)
 cobj=$(csrc:%.c=%.o)
+deps = $(csrc:%.c=%.d)
 
 kernel:$(asmobj) $(cobj) linker.ld
 	$(CXX) $(LDFLAGS) $(cobj) $(asmobj) -o $@ -T linker.ld
@@ -30,4 +33,8 @@ test:kernel
 	qemu-system-x86_64 -fda $<
 
 clean:
-	$(RM) kernel $(asmobj) $(cobj)
+	$(RM) kernel $(asmobj) $(cobj) $(deps)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(deps)
+endif