--- tstools-1.11.orig/Makefile
+++ tstools-1.11/Makefile
@@ -51,7 +51,7 @@
 ifdef NOOPT
 OPTIMISE_FLAGS = -g
 else
-OPTIMISE_FLAGS = -O2 -g
+OPTIMISE_FLAGS = -O2 -g -fPIC
 endif
 
 # Use PROFILE=1 to allow use of gprof (but this is *not* needed for valgrind)