diff --git a/libgsm-1.0.19-shared.patch b/gsm-1.0.20-shared.patch
similarity index 62%
rename from libgsm-1.0.19-shared.patch
rename to gsm-1.0.20-shared.patch
index 9b8c331..41bd109 100644
--- a/libgsm-1.0.19-shared.patch
+++ b/gsm-1.0.20-shared.patch
@@ -1,21 +1,15 @@
-diff -ru gsm-1.0-pl19.orig/Makefile gsm-1.0-pl19/Makefile
---- gsm-1.0-pl19.orig/Makefile	2020-03-27 22:17:15.000000000 +0100
-+++ gsm-1.0-pl19/Makefile	2020-04-20 10:30:52.913000000 +0200
-@@ -96,11 +96,11 @@
+--- gsm-1.0-pl20.orig/Makefile	2022-07-03 19:49:29.000000000 +0200
++++ gsm-1.0-pl20/Makefile	2022-07-16 13:35:25.819524994 +0200
+@@ -99,7 +99,7 @@
  #  Other tools
  
  SHELL		= /bin/sh
 -LN		= ln
-+LN		= ln -s -f
++LN		= ln -sf
  BASENAME 	= basename
  AR		= ar
  ARFLAGS		= cr
--RMFLAGS		=
-+RMFLAGS		= -f
- FIND		= find
- COMPRESS 	= gzip
- COMPRESSFLAGS 	= 
-@@ -139,7 +139,7 @@
+@@ -142,7 +142,7 @@
  
  # Targets
  
@@ -24,7 +18,7 @@ diff -ru gsm-1.0-pl19.orig/Makefile gsm-1.0-pl19/Makefile
  
  TOAST	= $(BIN)/toast
  UNTOAST	= $(BIN)/untoast
-@@ -257,7 +257,7 @@
+@@ -260,7 +260,7 @@
  # Install targets
  
  GSM_INSTALL_TARGETS =	\
@@ -33,7 +27,7 @@ diff -ru gsm-1.0-pl19.orig/Makefile gsm-1.0-pl19/Makefile
  		$(GSM_INSTALL_INC)/gsm.h		\
  		$(GSM_INSTALL_MAN)/gsm.3		\
  		$(GSM_INSTALL_MAN)/gsm_explode.3	\
-@@ -279,7 +279,7 @@
+@@ -282,7 +282,7 @@
  
  # Target rules
  
@@ -42,7 +36,7 @@ diff -ru gsm-1.0-pl19.orig/Makefile gsm-1.0-pl19/Makefile
  		@-echo $(ROOT): Done.
  
  tst:		$(TST)/lin2cod $(TST)/cod2lin $(TOAST) $(TST)/test-result
-@@ -299,24 +299,23 @@
+@@ -302,24 +302,23 @@
  
  # The basic API: libgsm
  
@@ -75,87 +69,16 @@ diff -ru gsm-1.0-pl19.orig/Makefile gsm-1.0-pl19/Makefile
  
  
  # The local bin and lib directories
-@@ -351,53 +350,54 @@
- 		fi
- 
- $(TOAST_INSTALL_BIN)/toast:	$(TOAST)
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $(TOAST) $@
- 		chmod 755 $@
- 
- $(TOAST_INSTALL_BIN)/untoast:	$(TOAST_INSTALL_BIN)/toast
--		-rm $@
--		ln $? $@
-+		-rm $(RMFLAGS) $@
-+		$(LN) toast $@
- 
- $(TOAST_INSTALL_BIN)/tcat:	$(TOAST_INSTALL_BIN)/toast
--		-rm $@
--		ln $? $@
-+		-rm $(RMFLAGS) $@
-+		$(LN) toast $@
- 
- $(TOAST_INSTALL_MAN)/toast.1:	$(MAN)/toast.1
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
- $(GSM_INSTALL_MAN)/gsm.3:	$(MAN)/gsm.3
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
- $(GSM_INSTALL_MAN)/gsm_option.3:	$(MAN)/gsm_option.3
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
- $(GSM_INSTALL_MAN)/gsm_explode.3:	$(MAN)/gsm_explode.3
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
- $(GSM_INSTALL_MAN)/gsm_print.3:	$(MAN)/gsm_print.3
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
- $(GSM_INSTALL_INC)/gsm.h:	$(INC)/gsm.h
--		-rm $@
--		cp $? $@
--		chmod 444 $@
--
--$(GSM_INSTALL_LIB)/libgsm.a:	$(LIBGSM)
--		-rm $@
-+		-rm $(RMFLAGS) $@
- 		cp $? $@
- 		chmod 444 $@
- 
-+$(GSM_INSTALL_LIB)/libgsm.so:	$(LIBGSMSO)
-+		-rm $(RMFLAGS) $@ $@.1 $@.1.0.13
-+		cp $?.1.0.13 $@.1.0.13
-+		chmod 755 $@.1.0.13
-+		$(LN) libgsm.so.1.0.13 $@
-+		$(LN) libgsm.so.1.0.13 $@.1
- 
- # Distribution
- 
-@@ -425,7 +425,7 @@
+@@ -428,7 +427,7 @@
  			-print | xargs rm $(RMFLAGS)
  
  clean:	semi-clean
 -		-rm $(RMFLAGS) $(LIBGSM) $(ADDTST)/add		\
 +		-rm $(RMFLAGS) $(LIBGSMSO)* $(ADDTST)/add		\
  			$(TOAST) $(TCAT) $(UNTOAST)	\
- 			$(ROOT)/gsm-1.0.tar.Z
+ 			$(ROOT)/gsm-1.0.tar.gz
  
-@@ -473,22 +473,22 @@
+@@ -476,22 +475,22 @@
  $(TST)/test-result:	$(TST)/lin2cod $(TST)/cod2lin $(TOAST) $(TST)/run
  			( cd $(TST); ./run ) 
  
diff --git a/gsm.spec b/gsm.spec
index 86b17f1..f0975ee 100644
--- a/gsm.spec
+++ b/gsm.spec
@@ -2,22 +2,21 @@
 %define minver %(echo %version | cut -d . -f3)
 
 Name:          gsm
-Version:       1.0.19
+Version:       1.0.20
 Release:       1mamba
 Summary:       GSM 06.10 lossy speech compression library
 Group:         System/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://www.quut.com/gsm
+URL:           http://www.quut.com/gsm/
 Source:        http://www.quut.com/gsm/gsm-%{version}.tar.gz
-Patch0:        libgsm-1.0.19-shared.patch
+Patch0:        gsm-1.0.20-shared.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
 Requires:      libgsm = %{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 GSM 06.10 lossy speech compression library.
@@ -68,6 +67,14 @@ make install \
    GSM_INSTALL_INC=%{buildroot}%{_includedir}/gsm \
    GSM_INSTALL_MAN=%{buildroot}%{_mandir}/man3
 
+cp -ap lib/libgsm* %{buildroot}%{_libdir}
+
+install -d -m0755 %{buildroot}%{_includedir}/gsm
+cp -a inc/*.h %{buildroot}%{_includedir}/gsm/
+
+install -d -m0755 %{buildroot}%{_mandir}/man3
+cp -a man/*.3 %{buildroot}%{_mandir}/man3/
+
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
@@ -93,6 +100,9 @@ make install \
 %doc ChangeLog README
 
 %changelog
+* Sat Jul 16 2022 Automatic Build System <autodist@mambasoft.it> 1.0.20-1mamba
+- automatic version update by autodist
+
 * Sat Apr 18 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.19-1mamba
 - update to 1.0.19