The wrong source files are specified in the makefile.
There is one wrapper source file which includes all and
implements additional functions.

--- a/src/Makefile.in	2011-03-11 01:21:16.000000000 +0100
+++ b/src/Makefile.in	2011-03-11 01:22:04.000000000 +0100
@@ -20,7 +20,7 @@
 	cp ../include/libirc_events.h  @prefix@/include/libirc_events.h 
 	cp libirc.a @prefix@/include/lib/libirc.a
 
-$(OBJS): utils.c dcc.c errors.c portable.c sockets.c colors.c
+$(OBJS): libircclient.c
 
 libircclient.a: $(OBJS)
 	$(AR) libircclient.a $(OBJS)