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* [Bug driver/46802] New: GCC option handling change breaks dejagnu
@ 2010-12-04 18:24 hjl.tools at gmail dot com
2010-12-04 18:45 ` [Bug driver/46802] " joseph at codesourcery dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: hjl.tools at gmail dot com @ 2010-12-04 18:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
Summary: GCC option handling change breaks dejagnu
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hjl.tools@gmail.com
CC: jsm28@gcc.gnu.org
GCC 4.6 failed binutils tests:
g++: warning: switch '-fvtable-gc' is no longer supported
g++: warning: switch '-fvtable-gc' is no longer supported
ERROR: /export/gnu/import/git/binutils/ld/testsuite/ld-selective/3.cc:
compilation failed
UNRESOLVED: selective4
prune_warnings in dejagnu has
regsub -all "(^|\n)(cc1: warning: -g is only supported when using GAS on
this processor\[^\n\]*\ncc1: warning:\[^\n\]*\n?)+" $text "\\1" text
regsub -all "(^|\n)(cc1plus: warning: -g is only supported when using GAS
on this processor\[^\n\]*\ncc1plus: warning:\[^\n\]*\n?)+" $text "\\1" text
Before GCC 4.6, we have
[hjl@gnu-6 tmp]$ g++ -fvtable-gc -S x.i
cc1plus: warning: switch \u2018-fvtable-gc\u2019 is no longer supported
GCC 4.6 has
[hjl@gnu-6 tmp]$ /usr/gcc-4.6/bin/g++ -fvtable-gc -S x.i
g++: warning: switch \u2018-fvtable-gc\u2019 is no longer supported
This change breaks prune_warnings.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/46802] GCC option handling change breaks dejagnu
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
@ 2010-12-04 18:45 ` joseph at codesourcery dot com
2010-12-04 18:49 ` hjl.tools at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: joseph at codesourcery dot com @ 2010-12-04 18:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2010-12-04 18:44:51 UTC ---
On Sat, 4 Dec 2010, hjl.tools at gmail dot com wrote:
> g++: warning: switch '-fvtable-gc' is no longer supported
> g++: warning: switch '-fvtable-gc' is no longer supported
This is unrelated to the DejaGnu code you quote.
> prune_warnings in dejagnu has
>
> regsub -all "(^|\n)(cc1: warning: -g is only supported when using GAS on
> this processor\[^\n\]*\ncc1: warning:\[^\n\]*\n?)+" $text "\\1" text
> regsub -all "(^|\n)(cc1plus: warning: -g is only supported when using GAS
> on this processor\[^\n\]*\ncc1plus: warning:\[^\n\]*\n?)+" $text "\\1" text
None of this DejaGnu code appears to do anything with -fvtable-gc
diagnostics, unless there was a previous warning about -g that you didn't
quote. The ld testsuite tries to skip these tests case on the compiler
version number - is that broken?
In any case, it's clearly better for warnings to start "g++:" instead of
"cc1plus:". The cc1plus binary is an internal implementation detail;
diagnostics should refer to the user-visible binary, which is g++ here.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/46802] GCC option handling change breaks dejagnu
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
2010-12-04 18:45 ` [Bug driver/46802] " joseph at codesourcery dot com
@ 2010-12-04 18:49 ` hjl.tools at gmail dot com
2010-12-04 18:56 ` joseph at codesourcery dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: hjl.tools at gmail dot com @ 2010-12-04 18:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-04 18:49:29 UTC ---
You can use GCC 4.6 to run "make check" in ld to see the
failures for yourselves.
I checked this patch into binutils:
http://sourceware.org/ml/binutils/2010-12/msg00189.html
to work around it.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/46802] GCC option handling change breaks dejagnu
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
2010-12-04 18:45 ` [Bug driver/46802] " joseph at codesourcery dot com
2010-12-04 18:49 ` hjl.tools at gmail dot com
@ 2010-12-04 18:56 ` joseph at codesourcery dot com
2010-12-04 19:06 ` hjl.tools at gmail dot com
2010-12-04 19:36 ` steven at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: joseph at codesourcery dot com @ 2010-12-04 18:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2010-12-04 18:56:17 UTC ---
This is not a GCC bug. It is correct that the message says "g++". (You
have not given a convincing analysis of why it breaks anything, but the
bug is still not in CGC.)
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/46802] GCC option handling change breaks dejagnu
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
` (2 preceding siblings ...)
2010-12-04 18:56 ` joseph at codesourcery dot com
@ 2010-12-04 19:06 ` hjl.tools at gmail dot com
2010-12-04 19:36 ` steven at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: hjl.tools at gmail dot com @ 2010-12-04 19:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-04 19:06:01 UTC ---
(In reply to comment #3)
> This is not a GCC bug. It is correct that the message says "g++". (You
> have not given a convincing analysis of why it breaks anything, but the
> bug is still not in CGC.)
I am not saying "g++" is incorrect. It is just that some packages
don't expect such changes in GCC warning messages. I have changed
binutils to work around it. I don't know if it will cause troubles
for other programs.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug driver/46802] GCC option handling change breaks dejagnu
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
` (3 preceding siblings ...)
2010-12-04 19:06 ` hjl.tools at gmail dot com
@ 2010-12-04 19:36 ` steven at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: steven at gcc dot gnu.org @ 2010-12-04 19:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46802
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |steven at gcc dot gnu.org
Resolution| |INVALID
--- Comment #5 from Steven Bosscher <steven at gcc dot gnu.org> 2010-12-04 19:36:27 UTC ---
This is not a real bug, and not even a GCC problem (I agree with Joseph that
this is actually an improvement).
But perhaps something can be said about this in the gcc-4.6 release notes.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-12-04 19:36 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-12-04 18:24 [Bug driver/46802] New: GCC option handling change breaks dejagnu hjl.tools at gmail dot com
2010-12-04 18:45 ` [Bug driver/46802] " joseph at codesourcery dot com
2010-12-04 18:49 ` hjl.tools at gmail dot com
2010-12-04 18:56 ` joseph at codesourcery dot com
2010-12-04 19:06 ` hjl.tools at gmail dot com
2010-12-04 19:36 ` steven at gcc dot gnu.org
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