re PR fortran/54301 (Add optional warning if pointer assigning a local variable to...

re PR fortran/54301 (Add optional warning if pointer assigning a local variable to a nonlocal pointer)

2012-08-20  Tobias Burnus  <burnus@net-b.de>

        PR fortran/54301
        * expr.c (gfc_check_pointer_assign): Warn when the pointer
        might outlive its target.
        * gfortran.h (struct gfc_option_t): Add warn_target_lifetime.
        * options.c (gfc_init_options, set_wall, gfc_handle_option):
        handle it.
        * invoke.texi (-Wtarget-lifetime): Document it.
        (-Wall): Implied it.
        * lang.opt (-Wtarget-lifetime): New flag.

2012-08-20  Tobias Burnus  <burnus@net-b.de>

        PR fortran/54301
        * gfortran.dg/warn_target_lifetime_1.f90: New.

From-SVN: r190522