Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754215AbaB0C6z (ORCPT ); Wed, 26 Feb 2014 21:58:55 -0500 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:41239 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700AbaB0C6y (ORCPT ); Wed, 26 Feb 2014 21:58:54 -0500 X-Originating-IP: 50.43.14.201 Date: Wed, 26 Feb 2014 18:58:45 -0800 From: Josh Triplett To: Joe Perches Cc: "H. Peter Anvin" , linux-sparse@vger.kernel.org, Linux Kernel Mailing List Subject: Re: [PATCH V2] sparse: Allow override of sizeof(bool) warning Message-ID: <20140227025845.GA25145@thin> References: <530E6F76.1070605@zytor.com> <1393462087.24588.50.camel@joe-AO722> <530E8C2E.7080307@zytor.com> <1393466619.24588.65.camel@joe-AO722> <20140227022857.GC23659@thin> <1393469594.24588.71.camel@joe-AO722> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1393469594.24588.71.camel@joe-AO722> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 26, 2014 at 06:53:14PM -0800, Joe Perches wrote: > Allow an override to emit or not the sizeof(bool) warning > Add a description to the manpage. > > Signed-off-by: Joe Perches Reviewed-by: Josh Triplett > evaluate.c | 3 ++- > lib.c | 2 ++ > lib.h | 1 + > sparse.1 | 9 +++++++++ > 4 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/evaluate.c b/evaluate.c > index 6655615..a45f59b 100644 > --- a/evaluate.c > +++ b/evaluate.c > @@ -2057,7 +2057,8 @@ static struct symbol *evaluate_sizeof(struct expression *expr) > } > > if (size == 1 && is_bool_type(type)) { > - warning(expr->pos, "expression using sizeof bool"); > + if (Wsizeof_bool) > + warning(expr->pos, "expression using sizeof bool"); > size = bits_in_char; > } > > diff --git a/lib.c b/lib.c > index bf3e91c..676b72e 100644 > --- a/lib.c > +++ b/lib.c > @@ -225,6 +225,7 @@ int Wone_bit_signed_bitfield = 1; > int Wparen_string = 0; > int Wptr_subtraction_blows = 0; > int Wreturn_void = 0; > +int Wsizeof_bool = 1; > int Wshadow = 0; > int Wtransparent_union = 0; > int Wtypesign = 0; > @@ -437,6 +438,7 @@ static const struct warning { > { "paren-string", &Wparen_string }, > { "ptr-subtraction-blows", &Wptr_subtraction_blows }, > { "return-void", &Wreturn_void }, > + { "sizeof-bool", &Wsizeof_bool }, > { "shadow", &Wshadow }, > { "transparent-union", &Wtransparent_union }, > { "typesign", &Wtypesign }, > diff --git a/lib.h b/lib.h > index f09b338..7e3432f 100644 > --- a/lib.h > +++ b/lib.h > @@ -119,6 +119,7 @@ extern int Wone_bit_signed_bitfield; > extern int Wparen_string; > extern int Wptr_subtraction_blows; > extern int Wreturn_void; > +extern int Wsizeof_bool; > extern int Wshadow; > extern int Wtransparent_union; > extern int Wtypesign; > diff --git a/sparse.1 b/sparse.1 > index cd6be26..b4546be 100644 > --- a/sparse.1 > +++ b/sparse.1 > @@ -288,6 +288,15 @@ programs consider this poor style, and those programs can use > Sparse does not issue these warnings by default. > . > .TP > +.B \-Wsizeof-bool > +Warn when checking the sizeof a _Bool. > + > +C99 does not specify the sizeof a _Bool. gcc uses 1. > + > +Sparse issues these warnings by default. To turn them off, use > +\fB\-Wno\-sizeof\-bool\fR. > +. > +.TP > .B \-Wshadow > Warn when declaring a symbol which shadows a declaration with the same name in > an outer scope. > -- > 1.8.1.2.459.gbcd45b4.dirty > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-sparse" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/