[Bug c++/54930] Add warning switch for "returning reference to temporary" and similar

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54930



--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-10-29 
23:21:42 UTC ---

Author: redi

Date: Mon Oct 29 23:21:35 2012

New Revision: 192968



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192968

Log:

gcc/c-family:

    PR c++/54930

    * c.opt (Wreturn_local_addr): Define new option.



gcc/c:

    PR c++/54930

    * c-typeck.c (c_finish_return): Use OPT_Wreturn_local_addr.



gcc/cp:

    PR c++/54930

    * typeck.c (maybe_warn_about_returning_address_of_local): Use

    OPT_Wreturn_local_addr.



gcc:

    PR c++/54930

    * doc/invoke.texi (Warning Options): Document -Wno-return-local-addr.



gcc/testsuite:

    PR c++/54930

    * gcc.dg/Wreturn-local-addr.c: New.

    * g++.dg/warn/Wno-return-local-addr.C: New.

    * g++.dg/warn/Wreturn-local-addr.C: New.



Added:

    trunk/gcc/testsuite/g++.dg/warn/Wno-return-local-addr.C

    trunk/gcc/testsuite/g++.dg/warn/Wreturn-local-addr.C

    trunk/gcc/testsuite/gcc.dg/Wreturn-local-addr.c

Modified:

    trunk/gcc/ChangeLog

    trunk/gcc/c-family/ChangeLog

    trunk/gcc/c-family/c.opt

    trunk/gcc/c/ChangeLog

    trunk/gcc/c/c-typeck.c

    trunk/gcc/cp/ChangeLog

    trunk/gcc/cp/typeck.c

    trunk/gcc/doc/invoke.texi

    trunk/gcc/testsuite/ChangeLog