From 73c67a814dfe0a305f2173f5e49f2c27169133b6 Mon Sep 17 00:00:00 2001
From: dongresource <dongresource@protonmail.com>
Date: Mon, 31 Aug 2020 18:10:01 +0200
Subject: [PATCH] Fix checking of header timestamps.

This is implemented in such a way that a change in one of our headers
won't cause recompilation of large C dependancies. It's a bit hacky, but
it works.
---
 Makefile | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3d99232..93a8e06 100644
--- a/Makefile
+++ b/Makefile
@@ -89,6 +89,8 @@ CXXOBJ=$(CXXSRC:.cpp=.o)
 
 OBJ=$(COBJ) $(CXXOBJ)
 
+HDR=$(CHDR) $(CXXHDR)
+
 all: $(SERVER)
 
 windows: $(SERVER)
@@ -103,12 +105,15 @@ windows : SERVER=$(WIN_SERVER)
 
 .SUFFIX: .o .c .cpp .h .hpp
 
-.c.o: $(CHDR)
+.c.o:
 	$(CC) -c $(CFLAGS) -o $@ $<
 
-.cpp.o: $(CXXHDR)
+.cpp.o:
 	$(CXX) -c $(CXXFLAGS) -o $@ $<
 
+# header timestamps are a prerequisite for OF object files
+$(CXXOBJ): $(CXXHDR)
+
 $(SERVER): $(OBJ) $(CHDR) $(CXXHDR)
 	mkdir -p bin
 	$(CXX) $(OBJ) $(LDFLAGS) -o $(SERVER)