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From: "jens.maurer at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59248] New: [4.8 regression] pointless -Wconversion warning with sizeof, take 2
Date: Fri, 22 Nov 2013 07:17:00 -0000 [thread overview]
Message-ID: <bug-59248-4@http.gcc.gnu.org/bugzilla/> (raw)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59248
Bug ID: 59248
Summary: [4.8 regression] pointless -Wconversion warning with
sizeof, take 2
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
The simple case was fixed with
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56930 (thanks, Jason), but a
slightly more involved case still warns spuriously:
$ g++ -Wconversion -std=c++11 x.cc
x.cc: In function ‘int main()’:
x.cc:3:12: warning: conversion to ‘int’ from ‘long unsigned int’ may alter its
value [-Wconversion]
int x = 2*sizeof(int);
^
x.cc:4:12: warning: conversion to ‘int’ from ‘long unsigned int’ may alter its
value [-Wconversion]
int y { 2* sizeof(int) };
^
This didn't produce any warnings with gcc 4.7.3.
>From gcc-bugs-return-435479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 22 08:15:37 2013
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From: "yves.caniou@ens-lyon.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/55915] fails to build lto-compress.c, zlib.h not found
Date: Fri, 22 Nov 2013 08:15:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55915
--- Comment #6 from Yves Caniou <yves.caniou@ens-lyon.fr> ---
(In reply to Yves Caniou from comment #5)
> Le mardi 19 novembre 2013 02:36:30 pinskia at gcc dot gnu.org a écrit :
> > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55915
> >
> > Andrew Pinski <pinskia at gcc dot gnu.org> changed:
> >
> > What |Removed |Added
> > ----------------------------------------------------------------------------
> > Status|UNCONFIRMED |WAITING
> > Last reconfirmed| |2013-11-19
> > Ever confirmed|0 |1
> >
> > --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> > (In reply to Yves Caniou from comment #3)
> >
> > > I have the same problem when compiling gcc-4.8.2 with gcc version 4.6.3
> > > (Ubuntu/Linaro 4.6.3-1ubuntu5) on Xeon(R) CPU W3670 @ 3.20GHz
> > > Note that with the exact same process, I have been able to compile
> > > gcc-4.8.2 with gcc 4.7.2 (debian).
> >
> > Do you have a zlib.h installed?
> > For the original issue here, I think you need to use BOOT_CFLAGS and maybe
> > BOOT_CXXFLAGS.
>
> Indeed: /usr/include/zlib.h
> And as I said, I could compile gcc-4.8.2 from 4.7.2 without any problem in
> the
> first place. Problems only appear when compiling gcc-4.8.2 with the new
> installation and all environment variables configured (at least as I
> thought:
> why would I use BOOT_FLAGS and how?)
>
> .Y
Ok. Wrong machine, I apologize.
I have a /usr/lib/syslinux/com32/include/zlib.h from syslinux-common package,
not /usr/include/zlib.h from zlib1g-dev.
Installing zlib1g-dev does the trick..
>From gcc-bugs-return-435481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 22 09:17:33 2013
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From: "fxcoudert at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/49024] REAL*16 ERFC_SCALED inaccuracy
Date: Fri, 22 Nov 2013 09:17:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idI024
Bug 49024 depends on bug 59227, which changed state.
Bug 59227 Summary: [4.9 regression] FAIL: gfortran.dg/erf_3.F90 -O0 execution test
http://gcc.gnu.org/bugzilla/show_bug.cgi?idY227
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
next reply other threads:[~2013-11-22 7:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-22 7:17 jens.maurer at gmx dot net [this message]
2013-11-22 10:31 ` [Bug c++/59248] " rguenth at gcc dot gnu.org
2013-11-22 10:31 ` rguenth at gcc dot gnu.org
2013-11-22 21:21 ` jens.maurer at gmx dot net
2014-02-10 17:01 ` jason at gcc dot gnu.org
2014-05-22 9:06 ` rguenth at gcc dot gnu.org
2014-12-10 12:50 ` rguenth at gcc dot gnu.org
2014-12-19 13:28 ` jakub at gcc dot gnu.org
2015-06-23 8:47 ` rguenth at gcc dot gnu.org
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