From 9270528a26cfd9f19d79519a61712c9d2f426106 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Wed, 12 Jun 2024 20:16:46 +0200
Subject: build system improvements

---
 .gitignore    |  1 +
 NodeInput.cpp |  2 +-
 makefile      | 23 ++++++++++++-----------
 3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/.gitignore b/.gitignore
index 1707139..31a3d9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 main
 *.o
+*.d
 .vscode
 .cache
 compile_commands.json
diff --git a/NodeInput.cpp b/NodeInput.cpp
index ea328e3..2fae505 100644
--- a/NodeInput.cpp
+++ b/NodeInput.cpp
@@ -14,7 +14,7 @@ NodeInput * NodeInput::clone() const {
 
 SignalLevel NodeInput::level() {
 	prutprint("BaseInput");
-	return HIGH;
+	return UNDEFINED;
 }
 SignalLevel NodeInputLow::level() {
 	prutprint("LOW");
diff --git a/makefile b/makefile
index cbdba7f..1cb47c3 100644
--- a/makefile
+++ b/makefile
@@ -1,24 +1,25 @@
-CC = g++
-LD = g++
-RM = rm -f
-CFLAGS = -g -std=c++20
-LFLAGS =
+CXXFLAGS += -g
+CXXFLAGS += -std=c++20
 TARGET = main
+
 SRCS := $(wildcard *.cpp)
-OBJS := $(patsubst %.cpp,%.o, $(SRCS))
+OBJS := $(SRCS:.cpp=.o)
+DEPS := $(SRCS:.cpp=.d)
 
 all: $(TARGET)
 
-%.o: %.cpp
-	$(CC) -c $(CFLAGS) $< -o $@
+-include $(wildcard *.d)
+all: $(DEPS)
 
 $(TARGET): $(OBJS)
-	$(LD) $^ $(LFLAGS) -o $@
+	$(CXX) $^ $(LFLAGS) -o $@
+
+%.d: %.cpp
+	$(CXX) -M $< -o $@
 
 clean:
-	$(RM) $(TARGET) $(OBJS)
+	$(RM) $(TARGET) $(OBJS) $(DEPS)
 
 compile_commands.json:
 	compiledb make -Bn
 
-_Bj: ; $(MAKE) -C . -Bj
-- 
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