re PR fortran/48858 (Incorrect error for same binding label on two generic interface...

re PR fortran/48858 (Incorrect error for same binding label on two generic interface specifics)

2011-05-06  Tobias Burnus  <burnus@net-b.de>

        PR fortran/48858
        PR fortran/48820
        * lang.opt (std=f2008tr): New.
        * libgfortran.h (GFC_STD_F2008_TR): New macro constant.
        * decl.c (verify_c_interop_param): Allow OPTIONAL in BIND(C)
        procedures for -std=f2008tr/gnu/legacy.

2011-05-06  Tobias Burnus  <burnus@net-b.de>

        PR fortran/48858
        PR fortran/48820
        * gfortran.dg/bind_c_usage_22.f90: New.
        * gfortran.dg/bind_c_usage_23.f90: New.
        * gfortran.dg/bind_c_usage_24.f90: New.
        * gfortran.dg/bind_c_usage_24_c.c: New.

From-SVN: r173500