Initial commit.

This first sketch of the memory layout isn't working because I'm
not succeeding in packing the bitfields, so I intend to rip it up
and start again.

Makefile

@@ -0,0 +1,33 @@
+PROJECT_ROOT = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+
+OBJS = grendel.o
+
+ifeq ($(BUILD_MODE),debug)
+	CFLAGS += -g -O0
+else ifeq ($(BUILD_MODE),run)
+	CFLAGS += -O2
+else ifeq ($(BUILD_MODE),profile)
+	CFLAGS += -g -pg -fprofile-arcs -ftest-coverage
+	LDFLAGS += -pg -fprofile-arcs -ftest-coverage
+	EXTRA_CLEAN += grendel.gcda grendel.gcno $(PROJECT_ROOT)gmon.out
+	EXTRA_CMDS = rm -rf grendel.gcda
+else
+    $(error Build mode $(BUILD_MODE) not supported by this Makefile)
+endif
+
+SRC_DIR=$(PROJECT_ROOT)/src
+
+all:	grendel
+
+grendel:	$(OBJS)
+	$(CXX) $(LDFLAGS) -o $@ $^
+	$(EXTRA_CMDS)
+
+# %.o:	$(SRC_DIR)/%.cpp
+#	$(CXX) -c $(CFLAGS) $(CXXFLAGS) $(CPPFLAGS) -o $@ $<
+
+%.o:	$(SRC_DIR)/%.c
+	$(CC) -c $(CFLAGS) $(CPPFLAGS) -o $@ $<
+
+clean:
+	rm -fr grendel $(OBJS) $(EXTRA_CLEAN)