[Bug c++/82466] Missing warning for re-declaration of built-in function as variable

[paolo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82466

--- Comment #7 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Oct 24 19:01:03 2017
New Revision: 254057

URL: https://gcc.gnu.org/viewcvs?rev=254057&root=gcc&view=rev
Log:
2017-10-24  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/82466
        * doc/invoke.texi ([Wbuiltin-declaration-mismatch]): Extend
        description.

/cp
2017-10-24  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/82466
        * decl.c (duplicate_decls): Warn for built-in functions declared as
        non-function, use OPT_Wbuiltin_declaration_mismatch.

        * decl.c (duplicate_decls): Avoid redundant '+' in warning_at.

/c
2017-10-24  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/82466
        * c-decl.c (diagnose_mismatched_decls): Use
        OPT_Wbuiltin_declaration_mismatch.

/testsuite
2017-10-24  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/82466
        * c-c++-common/Wbuiltin-declaration-mismatch-1.c: New.
        * c-c++-common/Wno-builtin-declaration-mismatch-1.c: Likewise.
        * g++.dg/warn/Wbuiltin_declaration_mismatch-1.C: Likewise.
        * g++.dg/parse/builtin2.C: Adjust.
        * g++.old-deja/g++.mike/p811.C: Likewise.

Added:
    trunk/gcc/testsuite/c-c++-common/Wbuiltin-declaration-mismatch-1.c
    trunk/gcc/testsuite/c-c++-common/Wno-builtin-declaration-mismatch-1.c
    trunk/gcc/testsuite/g++.dg/warn/Wbuiltin_declaration_mismatch-1.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-decl.c
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/parse/builtin2.C
    trunk/gcc/testsuite/g++.old-deja/g++.mike/p811.C