2013-05-07  Han Shen  <shenhan@google.com>

    gcc/
    * cfgexpand.c (record_or_union_type_has_array_p): New function.
    (expand_used_vars): Add logic handling '-fstack-protector-strong'.
    * common.opt (fstack-protector-strong): New option.
    * doc/cpp.texi (__SSP_STRONG__): New builtin "__SSP_STRONG__".
    * doc/invoke.texi (Optimization Options): Document
    "-fstack-protector-strong".
    * gcc.c (LINK_SSP_SPEC): Add 'fstack-protector-strong'.

    gcc/testsuite/
    * gcc.dg/fstack-protector-strong.c: New.
    * g++.dg/fstack-protector-strong.C: New.

    gcc/c-family/
    * c-cppbuiltin.c (c_cpp_builtins): Added "__SSP_STRONG__=3".

From-SVN: r198699