From 6cd58e5eea0c51c0a04e7afb5585cccd336a1c5a Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sat, 15 Oct 2022 13:42:20 -0700
Subject: Avoid rebuilding programs.cpp on every compile.

---
 Makefile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 18d889f..65cc016 100644
--- a/Makefile
+++ b/Makefile
@@ -33,11 +33,20 @@ clean:
 .SECONDARY:
 .SUFFIXES:
 
-override SOURCES := $(shell find -\( -name build -prune -\) -o -\( -\( -name \*.bin -o -name \*.cpp -o -name \*.pal -\) -print -\)) $(BUILD)/programs/programs.cpp
+override SOURCES := $(shell find -\( -name build -prune -\) -o -\( -\( -name \*.bin -o -name \*.cpp -o -name \*.pal -\) -print -\))
 
 override OBJECTS := $(addprefix $(BUILD)/, $(addsuffix .o, $(basename $(SOURCES))))
 override DEPENDS := $(addprefix $(BUILD)/, $(addsuffix .d, $(basename $(SOURCES))))
 
+override SOURCES += $(BUILD)/programs/programs.cpp
+override OBJECTS += $(BUILD)/programs/programs.o
+override DEPENDS += $(BUILD)/programs/programs.d $(BUILD)/programs/programs.cpp.d
+
+$(BUILD)/programs/programs.cpp.d:
+	@mkdir -p $(dir $@)
+	@echo "build/programs/programs.cpp:" `ls -1 programs/*` > $@
+.PHONY: $(BUILD)/programs/programs.cpp.d
+
 -include $(DEPENDS)
 
 $(BUILD)/%.bin: %.bin
@@ -62,7 +71,6 @@ $(BUILD)/%.o: $(BUILD)/%.cpp
 $(BUILD)/programs/programs.cpp:
 	@mkdir -p $(dir $@)
 	scripts/mkprograms > $@
-.PHONY: $(BUILD)/programs/programs.cpp
 
 $(BUILD)/minigolf: $(OBJECTS)
 	@mkdir -p $(dir $@)
-- 
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