--- gsm-1.0-pl13.old/Makefile
+++ gsm-1.0-pl13/Makefile
@@ -4,7 +4,7 @@
 
 # Machine- or installation dependent flags you should configure to port
 
-SASR	= -DSASR
+SASR	= -DSASR -fPIC
 ######### Define SASR if >> is a signed arithmetic shift (-1 >> 1 == -1)
 
 # MULHACK = -DUSE_FLOAT_MUL