Patch by Chris Waters removes -rpath from search flags and adds -soname
to library build options.

--- tcl8.5-8.5.11.orig/unix/configure
+++ tcl8.5-8.5.11/unix/configure
@@ -7351,6 +7351,9 @@
 	    # get rid of the warnings.
 	    #CFLAGS_OPTIMIZE="${CFLAGS_OPTIMIZE} -D__NO_STRING_INLINES -D__NO_MATH_INLINES"
 
+	    # following line added by CW for Debian GNU/Linux
+	    TCL_SHLIB_LD_EXTRAS="-Wl,-soname,\${TCL_LIB_FILE}.0"
+
 	    SHLIB_LD='${CC} -shared ${CFLAGS} ${LDFLAGS}'
 	    DL_OBJS="tclLoadDl.o"
 	    DL_LIBS="-ldl"
--- tcl8.5-8.5.11.orig/unix/Makefile.in
+++ tcl8.5-8.5.11/unix/Makefile.in
@@ -721,7 +721,10 @@
 	    fi
 	@echo "Installing $(LIB_FILE) to $(LIB_INSTALL_DIR)/"
 	@@INSTALL_LIB@
-	@chmod 555 "$(LIB_INSTALL_DIR)"/$(LIB_FILE)
+	mv "$(LIB_INSTALL_DIR)"/$(LIB_FILE) "$(LIB_INSTALL_DIR)"/$(LIB_FILE).0
+	ln -sf $(LIB_FILE).0 "$(LIB_INSTALL_DIR)"/$(LIB_FILE)
+	ln -sf "$(LIB_INSTALL_DIR)"/$(LIB_FILE).0 ./
+	@chmod 555 "$(LIB_INSTALL_DIR)"/$(LIB_FILE).0
 	@echo "Installing ${TCL_EXE} as $(BIN_INSTALL_DIR)/tclsh$(VERSION)@EXEEXT@"
 	@$(INSTALL_PROGRAM) ${TCL_EXE} "$(BIN_INSTALL_DIR)"/tclsh$(VERSION)@EXEEXT@
 	@echo "Installing tclConfig.sh to $(CONFIG_INSTALL_DIR)/"
--- tcl8.5-8.5.11.orig/unix/tcl.m4
+++ tcl8.5-8.5.11/unix/tcl.m4
@@ -1401,6 +1401,9 @@
 	    # get rid of the warnings.
 	    #CFLAGS_OPTIMIZE="${CFLAGS_OPTIMIZE} -D__NO_STRING_INLINES -D__NO_MATH_INLINES"
 
+	    # following line added by CW for Debian GNU/Linux
+	    TCL_SHLIB_LD_EXTRAS="-Wl,-soname,\${TCL_LIB_FILE}.0"
+
 	    SHLIB_LD='${CC} -shared ${CFLAGS} ${LDFLAGS}'
 	    DL_OBJS="tclLoadDl.o"
 	    DL_LIBS="-ldl"