Index: MultiSource/Benchmarks/Prolangs-C/unix-smail/Makefile
===================================================================
--- MultiSource/Benchmarks/Prolangs-C/unix-smail/Makefile
+++ MultiSource/Benchmarks/Prolangs-C/unix-smail/Makefile
@@ -1,6 +1,7 @@
 LEVEL = ../../../..
 
 PROG = unix-smail
+LDFLAGS = -Wl,--allow-multiple-definition
 RUN_OPTIONS = -v ALL
 STDIN_FILENAME = $(PROJ_SRC_DIR)/main.c