From 7a33344dd3005056fcc609d038102462ed11ecb8 Mon Sep 17 00:00:00 2001
From: Tom Steer <toms@pharoscontrols.com>
Date: Fri, 14 Nov 2025 16:05:34 +0000
Subject: [PATCH] Use GCC MD/MP flags to Track Dependencies

In order to automatically track dependencies such as header files,
use the GCC MD/MP flags to generate an included dependency list.

This ensures header dependencies are tracked to avoid unnecessary
rebuilds.
---
 firmware-template-gd32/lib/Rules.mk | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/firmware-template-gd32/lib/Rules.mk b/firmware-template-gd32/lib/Rules.mk
index 90d2497..188f0dd 100644
--- a/firmware-template-gd32/lib/Rules.mk
+++ b/firmware-template-gd32/lib/Rules.mk
@@ -72,11 +72,13 @@ LIST=lib.list
 define compile-objects
 $(info $1)
 $(BUILD)$1/%.o: $1/%.c
-	$(CC) $(COPS) -c $$< -o $$@
-	
+	$(CC) -MD -MP $(COPS) -c $$< -o $$@
+
 $(BUILD)$1/%.o: $1/%.cpp
-	$(CPP) $(COPS) $(CPPOPS) -c $$< -o $$@
-	
+	$(CPP) -MD -MP $(COPS) $(CPPOPS) -c $$< -o $$@
+
+-include $(BUILD)$1/*.d
+
 $(BUILD)$1/%.o: $1/%.S
 	$(CC) $(COPS) -D__ASSEMBLY__ -c $$< -o $$@
 endef