diff -up atanks-4.3/src/Makefile.add-lpthread atanks-4.3/src/Makefile
--- atanks-4.3/src/Makefile.add-lpthread 2010-01-15 02:24:24.000000000 +0100
+++ atanks-4.3/src/Makefile 2010-02-17 12:16:44.865030273 +0100
@@ -15,7 +15,7 @@ OUTPUT = ../atanks
WFLAGS =
OFLAGS =
LFLAGS +=
-LDFLAGS = `allegro-config --libs`
+LDFLAGS = `allegro-config --libs` -lpthread
CFLAGS += -g -Wall -Iinclude # -fprofile-arcs -ftest-coverage