Fix buffer stomping; retool Makefile.

The Makefile is now useful for building ke(1) to aid in more rapid
development. This works because ke doesn't (yet) need any special
non-system libraries.

Makefile

@@ -1,7 +1,36 @@
-.PHONY: all
-all:
-	mkdir -p build && cd build && cmake .. && make
+### quick Makefile to build ke in the top-level. It will never be used
+### kge; ke doesn't use any non-system libraries. vim, emacs, and joe
+### all support building from a Makefile in the root directory of the
+### project, so it's useful to quickly test builds when editing remote.
+CC :=		clang
+CXX := 		clang++
+CXXFLAGS :=	-Werror -Wall -Wextra -g -fsanitize=address -std=c++17
+LDFLAGS :=	
 
+SOURCES :=	Buffer.cc	Buffer.h		\
+		Cursor.cc	Cursor.h		\
+		Defs.cc		Defs.h			\
+		File.cc		File.h			\
+		main.cc
+OBJS := 	$(patsubst %.cc,%.o,$(filter %.cc,$(SOURCES)))
+TARGET :=	ke
+
+.PHONY: all
+all: tags trashme $(TARGET) 
+	./$(TARGET) trashme.txt
+
+.PHONY: trashme
+trashme:
+	cp Makefile trashme.txt
+
+.PHONY: cmake
+cmake: build
+	cd build && cmake --config Debug --build ..
+
+build:
+	mkdir -p build
+	
+# TODO: run these from ./scripts/install-dependencies.sh
 PHONY: deps
 deps:
 	sudo apt-get install doxygen scdoc
@@ -12,4 +41,20 @@ gui-deps:
 
 .PHONY:
 clean:
+	rm -f *.o $(TARGET)
+
+tags: $(SOURCES)
+	ctags --declarations -o $@ $(SOURCES)
+
+ke: $(OBJS)
+	$(CXX) -o $@ $(CXXFLAGS) $(LDFLAGS) $(OBJS)
+
+
+.PHONY: cclean
+cclean:
 	rm -r build cmake-build-*
+
+print-%: ; @echo '$(subst ','\'',$*=$($*))'
+
+%.o:%.cc
+	$(CXX) -c -o $@ $(CXXFLAGS) $<