configure.in (INSTALLDIR): Fix comment about changing INSTALLDIR's value...

 
	* libio/configure.in (INSTALLDIR): Fix comment about changing INSTALLDIR's
	value; don't change its value if --enable-version-specific-runtime-libs
	has been specified.
	* libstdc++/Makefile.in (install): Initialize RELINSTALLDIR correctly
	even for multilib and cross configurations.
	* libstdc++/configure.in (INSTALLDIR): Don't change INSTALLDIR's init
	value if --enable-version-specific-runtime-libs has been specified.

From-SVN: r22353

libio/configure.in

@@ -136,13 +136,12 @@ fi
 
 # post-target:
 
-# If cross-compiling, don't build gperf or the utils.  They
-# will get built by the target compiler, which is confusing.
-# We cannot test the installation.  We install in $(tooldir).
+# If cross-compiling, we install in $(tooldir)/lib or in $(libsubdir)
+# depending on --enable-version-specific-runtime-libs.
 if [ -n "${with_cross_host}" ] ; then
     rm -f Makefile.tem
     sed \
-	-e 's|\(^[ 	]*INSTALLDIR[ 	]*=[ 	]*\)[^ 	;]*|\1$(tooldir)/lib|' \
+        -e 's|\(^[ 	]*INSTALLDIR[ 	]*=[ 	]*\)\$(libdir)|\1$(tooldir)/lib|' \
 	Makefile >Makefile.tem
     mv -f Makefile.tem Makefile
 fi