+SERVERDIR=server
+CLIENTDIR=client
+COMMONDIR=common
+
+# Build object file lists by building object paths from all source file paths.
+SOURCES_SERVER=$(shell find $(SRCDIR)/$(SERVERDIR)/ -type f -name \*.c)
+SOURCES_CLIENT=$(shell find $(SRCDIR)/$(CLIENTDIR)/ -type f -name \*.c)
+SOURCES_COMMON=$(shell find $(SRCDIR)/$(COMMONDIR)/ -type f -name \*.c)
+OBJECTS_SERVER=$(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES_SERVER:.c=.o))
+OBJECTS_CLIENT=$(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES_CLIENT:.c=.o))
+OBJECTS_COMMON=$(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES_COMMON:.c=.o))
+
+# "make" without further specifications builds both server and client.
+default : $(TARGET_SERVER) $(TARGET_CLIENT)
+
+# "make roguelike-server" builds only the server.
+$(TARGET_SERVER) : $(OBJECTS_SERVER) $(OBJECTS_COMMON)
+ $(CC) $(CFLAGS) -o $(TARGET_SERVER) $(OBJECTS_SERVER) $(OBJECTS_COMMON)