Index: gsm-1.0-pl20/Makefile
===================================================================
--- gsm-1.0-pl20.orig/Makefile
+++ gsm-1.0-pl20/Makefile
@@ -99,7 +99,7 @@ TOAST_INSTALL_MAN = $(TOAST_INSTALL_ROOT
 #  Other tools
 
 SHELL		= /bin/sh
-LN		= ln
+LN		= ln -s
 BASENAME 	= basename
 AR		= ar
 ARFLAGS		= cr
@@ -143,6 +143,7 @@ LFLAGS	= $(LDFLAGS) $(LDINC)
 # Targets
 
 LIBGSM	= $(LIB)/libgsm.a
+LIBGSMSO= $(LIB)/libgsm.so
 
 TOAST	= $(BIN)/toast
 UNTOAST	= $(BIN)/untoast
@@ -282,7 +283,7 @@ TOAST_INSTALL_TARGETS =	\
 
 # Target rules
 
-all:		$(LIBGSM) $(TOAST) $(TCAT) $(UNTOAST)
+all:		$(LIBGSM) $(LIBGSMSO) $(TOAST) $(TCAT) $(UNTOAST)
 		@-echo $(ROOT): Done.
 
 tst:		$(TST)/lin2cod $(TST)/cod2lin $(TOAST) $(TST)/test-result
@@ -302,6 +303,11 @@ install:	toastinstall gsminstall
 
 # The basic API: libgsm
 
+$(LIBGSMSO):	$(LIB) $(GSM_OBJECTS)
+		$(LD) $(LDFLAGS) -o $@.1.0.18 -shared -Xlinker -soname -Xlinker libgsm.so.1 $(GSM_OBJECTS) -lc
+		ln -fs libgsm.so.1.0.18 lib/libgsm.so.1
+		ln -fs libgsm.so.1.0.18 lib/libgsm.so
+
 $(LIBGSM):	$(LIB) $(GSM_OBJECTS)
 		-rm $(RMFLAGS) $(LIBGSM)
 		$(AR) $(ARFLAGS) $(LIBGSM) $(GSM_OBJECTS)
@@ -311,15 +317,15 @@ $(LIBGSM):	$(LIB) $(GSM_OBJECTS)
 # Toast, Untoast and Tcat -- the compress-like frontends to gsm.
 
 $(TOAST):	$(BIN) $(TOAST_OBJECTS) $(LIBGSM)
-		$(LD) $(LFLAGS) -o $(TOAST) $(TOAST_OBJECTS) $(LIBGSM) $(LDLIB)
+		$(LD) $(LFLAGS) -o $(TOAST) $(TOAST_OBJECTS) $(LIBGSMSO) $(LDLIB)
 
 $(UNTOAST):	$(BIN) $(TOAST)
 		-rm $(RMFLAGS) $(UNTOAST)
-		$(LN) $(TOAST) $(UNTOAST)
+		$(LN) toast $(UNTOAST)
 
 $(TCAT):	$(BIN) $(TOAST)
 		-rm $(RMFLAGS) $(TCAT)
-		$(LN) $(TOAST) $(TCAT)
+		$(LN) toast $(TCAT)
 
 
 # The local bin and lib directories
@@ -428,9 +434,11 @@ semi-clean:
 			-print | xargs rm $(RMFLAGS)
 
 clean:	semi-clean
-		-rm $(RMFLAGS) $(LIBGSM) $(ADDTST)/add		\
-			$(TOAST) $(TCAT) $(UNTOAST)	\
-			$(ROOT)/gsm-1.0.tar.gz
+		-rm $(RMFLAGS) $(LIBGSM) $(ADDTST)/add \
+			$(LIBGSMSO) $(LIB)/libgsm.so.1.0.18 \
+			$(LIB)/libgsm.so.1 \
+			$(TOAST) $(TCAT) $(UNTOAST) \
+			$(ROOT)/gsm-1.0.tar.gz
 
 
 # Two tools that helped me generate gsm_encode.c and gsm_decode.c,