From b746033b91844e819a9879fae2ad90438c7b634a Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sat, 15 Nov 2025 21:53:39 -0500
Subject: build: Add header deps

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/Makefile | 4 +++-
 sys/kern/Makefile       | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/arch/amd64/Makefile b/sys/arch/amd64/Makefile
index 7c6c6c8..3430e48 100644
--- a/sys/arch/amd64/Makefile
+++ b/sys/arch/amd64/Makefile
@@ -8,6 +8,7 @@ ASMFILES = $(shell find . -name "*.S")
 CFILES = $(shell find . -name "*.c")
 ASMOBJS = $(ASMFILES:.S=.S.o)
 COBJ = $(CFILES:.c=.o)
+DFILES = $(CFILES:.c=.d)
 MISC_OFILES = $(shell find ../../ -name "*.o")
 
 .PHONY: all
@@ -18,9 +19,10 @@ all: $(ASMOBJS) $(COBJ)
 	$(PROMPT) " [AS] " $<
 	$(CC) -c -I../../target/inc/ $(SYS_CFLAGS) $< -o $@
 
+-include $(DFILES)
 %.o: %.c
 	$(PROMPT) " [CC] " $<
-	$(CC) -c -I../../target/inc/ -I../../inc/ $(SYS_CFLAGS) $< -o $@
+	$(CC) -c -MMD -I../../target/inc/ -I../../inc/ $(SYS_CFLAGS) $< -o $@
 
 .PHONY: clean
 clean:
diff --git a/sys/kern/Makefile b/sys/kern/Makefile
index 251bb8e..39260ca 100644
--- a/sys/kern/Makefile
+++ b/sys/kern/Makefile
@@ -6,12 +6,14 @@ CFILES += $(shell find ../lib -name "*.c")
 CFILES += $(shell find ../os -name "*.c")
 CFILES += $(shell find ../vm -name "*.c")
 OFILES = $(CFILES:.c=.o)
+DFILES = $(CFILES:.c=.d)
 CC =
 SYS_CFLAGS =
 
 .PHONY: all
 all: $(OFILES)
 
+-include $(DFILES)
 %.o: %.c
 	$(PROMPT) " [CC] " $<
-	$(CC) -c $< $(SYS_CFLAGS) -I../inc/ -I../inc/lib -o $@
+	$(CC) -c $< $(SYS_CFLAGS) -MMD -I../inc/ -I../inc/lib -o $@
-- 
cgit v1.2.3