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* [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion
@ 2010-11-05 7:03 johan162 at gmail dot com
2010-11-10 7:54 ` [Bug libc/12194] " drepper.fsp at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: johan162 at gmail dot com @ 2010-11-05 7:03 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=12194
Summary: htons() gives warning if compiled with gcc
-Wconversion
Product: glibc
Version: 2.10
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper.fsp@gmail.com
ReportedBy: johan162@gmail.com
The following (legitimate) code will generate a warning when both -O2 and
-Wconversion is enabled but not when only -Wconversion is enabled.
Code:
#include <arpa/inet.h>
// Nonsense code to illustrate problem
int main(void) {
uint16_t portnbr=0;
uint16_t n_portnbr = htons(portnbr);
exit(0);
}
With optimization
$> gcc -std=gnu99 -Wconversion -Werror -O2 -c tsthtons.c
cc1: warnings being treated as errors
tsthtons.c: In function ‘main’:
tsthtons.c:6: error: conversion to ‘short unsigned int’ from ‘int’ may alter
its value
and without
$>gcc -std=gnu99 -Wconversion -Werror -c tsthtons.c
$>
in both cases
gcc --version
gcc (SUSE Linux) 4.4.1 [gcc-4_4-branch revision 150839]
Copyright (C) 2009 Free Software Foundation, Inc.
and gnu clib v2.10.1
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* [Bug libc/12194] htons() gives warning if compiled with gcc -Wconversion
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
@ 2010-11-10 7:54 ` drepper.fsp at gmail dot com
2012-06-20 5:56 ` andersk at mit dot edu
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: drepper.fsp at gmail dot com @ 2010-11-10 7:54 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=12194
Ulrich Drepper <drepper.fsp at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #1 from Ulrich Drepper <drepper.fsp at gmail dot com> 2010-11-10 07:54:40 UTC ---
Changed in git.
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* [Bug libc/12194] htons() gives warning if compiled with gcc -Wconversion
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
2010-11-10 7:54 ` [Bug libc/12194] " drepper.fsp at gmail dot com
@ 2012-06-20 5:56 ` andersk at mit dot edu
2012-06-20 7:20 ` aj at suse dot de
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: andersk at mit dot edu @ 2012-06-20 5:56 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=12194
Anders Kaseorg <andersk at mit dot edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andersk at mit dot edu
--- Comment #2 from Anders Kaseorg <andersk at mit dot edu> 2012-06-20 05:56:27 UTC ---
Shouldn’t the same change
(http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=69da074d7adfab7b57004a0dea9403a928e310a5)
be applied to sysdeps/s390/bits/byteswap.h and the generic bits/byteswap.h?
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* [Bug libc/12194] htons() gives warning if compiled with gcc -Wconversion
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
2010-11-10 7:54 ` [Bug libc/12194] " drepper.fsp at gmail dot com
2012-06-20 5:56 ` andersk at mit dot edu
@ 2012-06-20 7:20 ` aj at suse dot de
2012-06-21 13:52 ` aj at suse dot de
2014-06-30 6:30 ` fweimer at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: aj at suse dot de @ 2012-06-20 7:20 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=12194
Andreas Jaeger <aj at suse dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
CC| |aj at suse dot de
Resolution|FIXED |
AssignedTo|drepper.fsp at gmail dot |aj at suse dot de
|com |
--- Comment #3 from Andreas Jaeger <aj at suse dot de> 2012-06-20 07:19:45 UTC ---
thanks, patch send: http://sourceware.org/ml/libc-alpha/2012-06/msg00550.html
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* [Bug libc/12194] htons() gives warning if compiled with gcc -Wconversion
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
` (2 preceding siblings ...)
2012-06-20 7:20 ` aj at suse dot de
@ 2012-06-21 13:52 ` aj at suse dot de
2014-06-30 6:30 ` fweimer at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: aj at suse dot de @ 2012-06-21 13:52 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=12194
Andreas Jaeger <aj at suse dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |FIXED
--- Comment #4 from Andreas Jaeger <aj at suse dot de> 2012-06-21 13:52:12 UTC ---
Fixed for glibc 2.16 now with:
commit 2174c6dd8555f654c30df2f8f3321b69e0f736f8
Author: Andreas Jaeger <aj@suse.de>
Date: Thu Jun 21 15:49:33 2012 +0200
Avoid -Wconversion warning for htons
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* [Bug libc/12194] htons() gives warning if compiled with gcc -Wconversion
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
` (3 preceding siblings ...)
2012-06-21 13:52 ` aj at suse dot de
@ 2014-06-30 6:30 ` fweimer at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: fweimer at redhat dot com @ 2014-06-30 6:30 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=12194
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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end of thread, other threads:[~2014-06-30 6:30 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-11-05 7:03 [Bug libc/12194] New: htons() gives warning if compiled with gcc -Wconversion johan162 at gmail dot com
2010-11-10 7:54 ` [Bug libc/12194] " drepper.fsp at gmail dot com
2012-06-20 5:56 ` andersk at mit dot edu
2012-06-20 7:20 ` aj at suse dot de
2012-06-21 13:52 ` aj at suse dot de
2014-06-30 6:30 ` fweimer at redhat dot com
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