--- Makefile.orig	2020-03-27 14:17:15.000000000 -0700
+++ Makefile	2020-12-26 17:47:37.889939000 -0800
@@ -43,8 +43,8 @@
 # CC		= /usr/lang/acc
 # CCFLAGS 	= -c -O
 
-CC		= gcc -ansi -pedantic
-CCFLAGS 	= -c -O2 -DNeedFunctionPrototypes=1 -Wall -Wno-comment
+#CC		= gcc -ansi -pedantic
+CCFLAGS 	+= -c -DNeedFunctionPrototypes=1 -Wall -Wno-comment
 
 LD 		= $(CC)
 
@@ -59,11 +59,13 @@
 ######### Includes needed by $(CC)
 
 # LDINC	= -L/usr/gnu/lib/gcc-2.1/gcc-lib/sparc-sun-sunos4.1.2/2.1
+LDINC = -L$(LIB)
 ######### Library paths needed by $(LD)
 
 # LDLIB	= -lgcc
 ######### Additional libraries needed by $(LD)
 
+#PREFIX= /usr/local
 
 # Where do you want to install libraries, binaries, a header file
 # and the manual pages?
@@ -71,7 +73,7 @@
 # Leave INSTALL_ROOT empty (or just don't execute "make install") to
 # not install gsm and toast outside of this directory.
 
-INSTALL_ROOT	=
+INSTALL_ROOT    =       $(DESTDIR)$(PREFIX)
 
 # Where do you want to install the gsm library, header file, and manpages?
 #
@@ -80,7 +82,7 @@
 
 GSM_INSTALL_ROOT = $(INSTALL_ROOT)
 GSM_INSTALL_LIB = $(GSM_INSTALL_ROOT)/lib
-GSM_INSTALL_INC = $(GSM_INSTALL_ROOT)/inc
+GSM_INSTALL_INC = $(GSM_INSTALL_ROOT)/include
 GSM_INSTALL_MAN = $(GSM_INSTALL_ROOT)/man/man3
 
 
@@ -106,6 +108,7 @@
 COMPRESSFLAGS 	= 
 # RANLIB 	= true
 RANLIB	 	= ranlib
+RM		= rm -f
 
 #
 #    You shouldn't have to configure below this line if you're porting.
@@ -129,18 +132,19 @@
 # DEBUG	= -DNDEBUG
 ######### Remove -DNDEBUG to enable assertions.
 
-CFLAGS	= $(CCFLAGS) $(SASR) $(DEBUG) $(MULHACK) $(FAST) $(LTP_CUT) \
+CFLAGS += $(CCFLAGS) $(SASR) $(DEBUG) $(MULHACK) $(FAST) $(LTP_CUT) \
 	$(WAV49) $(CCINC) -I$(INC)
 ######### It's $(CC) $(CFLAGS)
 
 LFLAGS	= $(LDFLAGS) $(LDINC)
 ######### It's $(LD) $(LFLAGS)
 
+.SUFFIXES: .c .so .o
 
 # Targets
 
-LIBGSM	= $(LIB)/libgsm.a
-
+LIBGSM	= libgsm.a
+SOLIBGSM	= libgsm.so.1
 TOAST	= $(BIN)/toast
 UNTOAST	= $(BIN)/untoast
 TCAT	= $(BIN)/tcat
@@ -257,13 +261,15 @@
 # Install targets
 
 GSM_INSTALL_TARGETS =	\
-		$(GSM_INSTALL_LIB)/libgsm.a		\
+		$(GSM_INSTALL_LIB)/$(LIBGSM)		\
+		$(GSM_INSTALL_LIB)/$(SOLIBGSM)		\
 		$(GSM_INSTALL_INC)/gsm.h		\
 		$(GSM_INSTALL_MAN)/gsm.3		\
 		$(GSM_INSTALL_MAN)/gsm_explode.3	\
 		$(GSM_INSTALL_MAN)/gsm_option.3		\
 		$(GSM_INSTALL_MAN)/gsm_print.3
 
+
 TOAST_INSTALL_TARGETS =	\
 		$(TOAST_INSTALL_BIN)/toast		\
 		$(TOAST_INSTALL_BIN)/tcat		\
@@ -277,9 +283,12 @@
 		$(CC) $(CFLAGS) $?
 		@-mv `$(BASENAME) $@` $@ > /dev/null 2>&1
 
+.c.so:
+		${CC} -fpic -DPIC ${CFLAGS} -c ${.IMPSRC} -o ${.TARGET}
+
 # Target rules
 
-all:		$(LIBGSM) $(TOAST) $(TCAT) $(UNTOAST)
+all:            $(LIB)/$(LIBGSM) $(LIB)/$(SOLIBGSM) $(TOAST) $(TCAT) $(UNTOAST)
 		@-echo $(ROOT): Done.
 
 tst:		$(TST)/lin2cod $(TST)/cod2lin $(TOAST) $(TST)/test-result
@@ -299,24 +308,28 @@
 
 # The basic API: libgsm
 
-$(LIBGSM):	$(LIB) $(GSM_OBJECTS)
-		-rm $(RMFLAGS) $(LIBGSM)
-		$(AR) $(ARFLAGS) $(LIBGSM) $(GSM_OBJECTS)
-		$(RANLIB) $(LIBGSM)
+$(LIB)/$(SOLIBGSM): $(LIB) $(GSM_OBJECTS:S/o$/so/g)
+		$(CC) -o $@ -shared -Wl,-soname,$(SOLIBGSM) $(GSM_OBJECTS:S/o$/so/g)
+		(cd $(LIB); $(LN) -sf $(SOLIBGSM) `echo $(SOLIBGSM) | sed 's/\.so.*$$/.so/'`)
 
+$(LIB)/$(LIBGSM):	$(LIB) $(GSM_OBJECTS)
+		$(RM) $(RMFLAGS) $(LIBGSM)
+		$(AR) $(ARFLAGS) $(LIB)/$(LIBGSM) $(GSM_OBJECTS)
+		$(RANLIB) $(LIB)/$(LIBGSM)
 
+
 # Toast, Untoast and Tcat -- the compress-like frontends to gsm.
 
-$(TOAST):	$(BIN) $(TOAST_OBJECTS) $(LIBGSM)
-		$(LD) $(LFLAGS) -o $(TOAST) $(TOAST_OBJECTS) $(LIBGSM) $(LDLIB)
+$(TOAST):	$(BIN) $(TOAST_OBJECTS) $(LIB)/$(LIBGSM)
+		$(LD) $(LFLAGS) -o $(TOAST) $(TOAST_OBJECTS) -lgsm $(LDLIB)
 
 $(UNTOAST):	$(BIN) $(TOAST)
-		-rm $(RMFLAGS) $(UNTOAST)
-		$(LN) $(TOAST) $(UNTOAST)
+		$(RM) $(RMFLAGS) $(UNTOAST)
+		$(LN) -sf $(TOAST) $(UNTOAST)
 
 $(TCAT):	$(BIN) $(TOAST)
-		-rm $(RMFLAGS) $(TCAT)
-		$(LN) $(TOAST) $(TCAT)
+		$(RM) $(RMFLAGS) $(TCAT)
+		$(LN) -sf $(TOAST) $(TCAT)
 
 
 # The local bin and lib directories
@@ -342,62 +355,66 @@
 
 gsmuninstall:
 		-if [ x"$(GSM_INSTALL_ROOT)" != x ] ; then	\
-			rm $(RMFLAGS) $(GSM_INSTALL_TARGETS) ;	\
+			$(RM)$(RMFLAGS) $(GSM_INSTALL_TARGETS) ;	\
 		fi
 
 toastuninstall:
 		-if [ x"$(TOAST_INSTALL_ROOT)" != x ] ; then 	\
-			rm $(RMFLAGS) $(TOAST_INSTALL_TARGETS);	\
+			$(RM)$(RMFLAGS) $(TOAST_INSTALL_TARGETS);	\
 		fi
 
 $(TOAST_INSTALL_BIN)/toast:	$(TOAST)
-		-rm $@
-		cp $(TOAST) $@
-		chmod 755 $@
+		$(RM) $@
+		${BSD_INSTALL_PROGRAM} $(TOAST) $@
 
 $(TOAST_INSTALL_BIN)/untoast:	$(TOAST_INSTALL_BIN)/toast
-		-rm $@
-		ln $? $@
+		$(RM) $@
+		$(LN) -sf toast $@
 
 $(TOAST_INSTALL_BIN)/tcat:	$(TOAST_INSTALL_BIN)/toast
-		-rm $@
-		ln $? $@
+		$(RM) $@
+		$(LN) -sf toast $@
 
 $(TOAST_INSTALL_MAN)/toast.1:	$(MAN)/toast.1
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_MAN} $? $@
 
+$(TOAST_INSTALL_MAN)/untoast.1:	$(MAN)/toast.1
+		$(RM) $@
+		$(LN) -sf toast.1 $@
+
+$(TOAST_INSTALL_MAN)/tcat.1:	$(MAN)/toast.1
+		$(RM) $@
+		$(LN) -sf toast.1 $@
+
 $(GSM_INSTALL_MAN)/gsm.3:	$(MAN)/gsm.3
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_MAN} $? $@
 
 $(GSM_INSTALL_MAN)/gsm_option.3:	$(MAN)/gsm_option.3
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_MAN} $? $@
 
 $(GSM_INSTALL_MAN)/gsm_explode.3:	$(MAN)/gsm_explode.3
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_MAN} $? $@
 
 $(GSM_INSTALL_MAN)/gsm_print.3:	$(MAN)/gsm_print.3
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_MAN} $? $@
 
 $(GSM_INSTALL_INC)/gsm.h:	$(INC)/gsm.h
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+		$(RM) $@
+		${BSD_INSTALL_DATA} $? $@
 
-$(GSM_INSTALL_LIB)/libgsm.a:	$(LIBGSM)
-		-rm $@
-		cp $? $@
-		chmod 444 $@
+$(GSM_INSTALL_LIB)/$(LIBGSM):	$(LIB)/$(LIBGSM)
+		$(RM) $@
+		${BSD_INSTALL_DATA} $? $@
 
+$(GSM_INSTALL_LIB)/$(SOLIBGSM):    $(LIB)/$(SOLIBGSM)
+		$(RM) $@
+		${BSD_INSTALL_LIB} $? $@
+		(cd $(GSM_INSTALL_LIB); $(LN) -sf $(SOLIBGSM) `echo $(SOLIBGSM) | sed 's/\.so.*$$/.so/'`)
 
 # Distribution