2014-12-09  Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>

        (libgcc_s) Optional filename-based shared library versioning on AIX.
        * gcc/doc/install.texi: Describe --with-aix-soname option.
        * Makefile.in (with_aix_soname): Define.
        * config/rs6000/t-slibgcc-aix: Act upon --with-aix-soname option.
        * configure.ac: Accept --with-aix-soname=aix|svr4|both option.
        * configure: Recreate.

From-SVN: r218539