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* [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk
@ 2012-05-08 22:31 doko at gcc dot gnu.org
2012-05-28 5:11 ` [Bug other/53285] " doko at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: doko at gcc dot gnu.org @ 2012-05-08 22:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285
Bug #: 53285
Summary: libibiberty's md5.c builds with warnings with 4.7 and
trunk
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: doko@gcc.gnu.org
when libibiberty's md5.c is built using 4.7 or trunk on x86-linux, the
following warning is emitted:
md5.c: In function 'md5_finish_ctx':
md5.c:119:2: error: dereferencing type-punned pointer will break
strict-aliasing rules [-Werror=strict-aliasing]
*(md5_uint32 *) & ctx->buffer[bytes + pad] = SWAP (ctx->total[0] << 3);
^
md5.c:120:2: error: dereferencing type-punned pointer will break
strict-aliasing rules [-Werror=strict-aliasing]
*(md5_uint32 *) & ctx->buffer[bytes + pad + 4] =
^
afaics this is the only warning emitted when building libiberty when built with
4.7 or trunk.
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk 2012-05-08 22:31 [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk doko at gcc dot gnu.org @ 2012-05-28 5:11 ` doko at gcc dot gnu.org 2012-05-28 7:26 ` doko at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: doko at gcc dot gnu.org @ 2012-05-28 5:11 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 --- Comment #1 from Matthias Klose <doko at gcc dot gnu.org> 2012-05-28 04:38:50 UTC --- Created attachment 27511 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27511 patch taken from glibc the md5.c copy in glibc was fixed with the attached patch ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk 2012-05-08 22:31 [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk doko at gcc dot gnu.org 2012-05-28 5:11 ` [Bug other/53285] " doko at gcc dot gnu.org @ 2012-05-28 7:26 ` doko at gcc dot gnu.org 2013-01-31 8:14 ` ktietz at gcc dot gnu.org 2013-01-31 8:22 ` ktietz at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: doko at gcc dot gnu.org @ 2012-05-28 7:26 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 --- Comment #2 from Matthias Klose <doko at gcc dot gnu.org> 2012-05-28 06:42:37 UTC --- the patch is incomplete. the patch from glibc is found at http://sourceware.org/git/?p=glibc.git;a=patch;h=7dc6bd90c569c49807462b0740b18e32fab4d8b7 using anonymous unions which cannot be used for stage1. The original patch is http://sourceware.org/ml/libc-alpha/2011-07/msg00085.html A third approach from gnulib is pointed out in http://sourceware.org/ml/libc-alpha/2011-07/msg00093.html ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk 2012-05-08 22:31 [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk doko at gcc dot gnu.org 2012-05-28 5:11 ` [Bug other/53285] " doko at gcc dot gnu.org 2012-05-28 7:26 ` doko at gcc dot gnu.org @ 2013-01-31 8:14 ` ktietz at gcc dot gnu.org 2013-01-31 8:22 ` ktietz at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: ktietz at gcc dot gnu.org @ 2013-01-31 8:14 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 --- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> 2013-01-31 08:14:32 UTC --- Author: ktietz Date: Thu Jan 31 08:14:27 2013 New Revision: 195601 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195601 Log: Merged from trunk. PR other/53285 * md5.c (md5_finish_ctx): Declare swap_bytes. Assign SWAP() output to swap_bytes, and then call memcpy to move it to ctx->buffer. Modified: branches/gcc-4_7-branch/libiberty/ChangeLog branches/gcc-4_7-branch/libiberty/md5.c ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug other/53285] libibiberty's md5.c builds with warnings with 4.7 and trunk 2012-05-08 22:31 [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk doko at gcc dot gnu.org ` (2 preceding siblings ...) 2013-01-31 8:14 ` ktietz at gcc dot gnu.org @ 2013-01-31 8:22 ` ktietz at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: ktietz at gcc dot gnu.org @ 2013-01-31 8:22 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53285 Kai Tietz <ktietz at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |ktietz at gcc dot gnu.org Resolution| |FIXED --- Comment #4 from Kai Tietz <ktietz at gcc dot gnu.org> 2013-01-31 08:21:48 UTC --- backported mainline-fix for this to 4.7. Fixed. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2013-01-31 8:22 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-05-08 22:31 [Bug other/53285] New: libibiberty's md5.c builds with warnings with 4.7 and trunk doko at gcc dot gnu.org 2012-05-28 5:11 ` [Bug other/53285] " doko at gcc dot gnu.org 2012-05-28 7:26 ` doko at gcc dot gnu.org 2013-01-31 8:14 ` ktietz at gcc dot gnu.org 2013-01-31 8:22 ` ktietz at gcc dot gnu.org
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