[Bug fortran/54301] Add optional warning if pointer assigning a local variable to a nonlocal pointer

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54301

--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-08-20 05:47:55 UTC ---
Author: burnus
Date: Mon Aug 20 05:47:46 2012
New Revision: 190522

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190522
Log:
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.


Added:
    trunk/gcc/testsuite/gfortran.dg/warn_target_lifetime_1.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/expr.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/invoke.texi
    trunk/gcc/fortran/lang.opt
    trunk/gcc/fortran/options.c
    trunk/gcc/testsuite/ChangeLog