Dependency on xorg7-* only on last package

Our gen-special.sh transforms a dependency on compound packages
(xorg7-*) on a dependency on the list of packages. This generates
a lot of trials when removing circular dependencies, because if the
dependency on xorg7-* is optional, all packages in the list are tried
in turn, while it is sure that anyway the dependecy must be eliminated.
If the dependency is only on the last package, the circular dep
is eliminated at first try.

BLFS/gen-special.sh

@@ -169,6 +169,24 @@ EOF
     cat >>$SPECIAL_FILE << EOF
 <!-- End dependencies -->
         </module>
+EOF
+#    cat >> tmpfile << EOF
+#        <xsl:element name="dependency">
+#          <xsl:attribute name="status">
+#            <xsl:value-of select="\$status"/>
+#          </xsl:attribute>
+#          <xsl:attribute name="build">
+#            <xsl:value-of select="\$build"/>
+#          </xsl:attribute>
+#          <xsl:attribute name="name">$packname</xsl:attribute>
+#          <xsl:attribute name="type">ref</xsl:attribute>
+#        </xsl:element>
+#EOF
+    precpack=$packname
+  done
+  cat >>$SPECIAL_FILE << EOF
+     </package>
+   </xsl:when>
 EOF
   cat >> tmpfile << EOF
         <xsl:element name="dependency">
@@ -181,13 +199,6 @@ EOF
           <xsl:attribute name="name">$packname</xsl:attribute>
           <xsl:attribute name="type">ref</xsl:attribute>
         </xsl:element>
-EOF
-  done
-  cat >>$SPECIAL_FILE << EOF
-     </package>
-   </xsl:when>
-EOF
-  cat >> tmpfile << EOF
       </xsl:when>
 EOF
 done