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* [Bug fortran/18794] New: warn about common variable alignment problems
@ 2004-12-02 20:12 Thomas dot Koenig at online dot de
2004-12-02 21:01 ` [Bug fortran/18794] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Thomas dot Koenig at online dot de @ 2004-12-02 20:12 UTC (permalink / raw)
To: gcc-bugs
$ cat common.f
program main
character*1 c
common /foo/ c,r
c = 'a'
r = 1.2
end
$ g77 common.f
common.f: In program `main':
common.f:3: warning:
common /foo/ c,r
^
Initial padding for common block `foo' is 3 bytes at (^) -- consider
reorderingmembers, largest-type-size first
$ gfortran common.f
$ gfortran -v
Reading specs from /home/ig25/lib/gcc/i686-pc-linux-gnu/4.0.0/specs
Configured with: ../gcc/configure --prefix=/home/ig25
--enable-languages=c,c++,f95 : (reconfigured) ../gcc/configure
--prefix=/home/ig25 --with-gcc-version-trigger=/home/ig25/gcc/gcc/version.c
--enable-languages=c,c++,f95 --no-create --no-recursion
Thread model: posix
gcc version 4.0.0 20041129 (experimental)
Just about any Fortran compiler warns about this sort
of thing (and they should, the performance penalty
for this kind of thing can be severe).
--
Summary: warn about common variable alignment problems
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Thomas dot Koenig at online dot de
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18794
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/18794] warn about common variable alignment problems
2004-12-02 20:12 [Bug fortran/18794] New: warn about common variable alignment problems Thomas dot Koenig at online dot de
@ 2004-12-02 21:01 ` pinskia at gcc dot gnu dot org
2005-01-06 14:42 ` tobi at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-02 21:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-02 21:01 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |diagnostic
Last reconfirmed|0000-00-00 00:00:00 |2004-12-02 21:01:49
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18794
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/18794] warn about common variable alignment problems
2004-12-02 20:12 [Bug fortran/18794] New: warn about common variable alignment problems Thomas dot Koenig at online dot de
2004-12-02 21:01 ` [Bug fortran/18794] " pinskia at gcc dot gnu dot org
@ 2005-01-06 14:42 ` tobi at gcc dot gnu dot org
2005-01-17 11:05 ` Thomas dot Koenig at online dot de
2005-04-20 2:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: tobi at gcc dot gnu dot org @ 2005-01-06 14:42 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
OtherBugsDependingO| |19292
nThis| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18794
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/18794] warn about common variable alignment problems
2004-12-02 20:12 [Bug fortran/18794] New: warn about common variable alignment problems Thomas dot Koenig at online dot de
2004-12-02 21:01 ` [Bug fortran/18794] " pinskia at gcc dot gnu dot org
2005-01-06 14:42 ` tobi at gcc dot gnu dot org
@ 2005-01-17 11:05 ` Thomas dot Koenig at online dot de
2005-04-20 2:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: Thomas dot Koenig at online dot de @ 2005-01-17 11:05 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From Thomas dot Koenig at online dot de 2005-01-17 11:05 -------
This is fixed with the 20050116 snapshot:
$ gfortran common.f
In file common.f:3
common /foo/ c,r
1
Warning: COMMON 'foo' at (1) requires 3 bytes of padding at start
Thomas
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18794
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/18794] warn about common variable alignment problems
2004-12-02 20:12 [Bug fortran/18794] New: warn about common variable alignment problems Thomas dot Koenig at online dot de
` (2 preceding siblings ...)
2005-01-17 11:05 ` Thomas dot Koenig at online dot de
@ 2005-04-20 2:00 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-04-20 2:00 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18794
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-04-20 2:00 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-12-02 20:12 [Bug fortran/18794] New: warn about common variable alignment problems Thomas dot Koenig at online dot de
2004-12-02 21:01 ` [Bug fortran/18794] " pinskia at gcc dot gnu dot org
2005-01-06 14:42 ` tobi at gcc dot gnu dot org
2005-01-17 11:05 ` Thomas dot Koenig at online dot de
2005-04-20 2:00 ` pinskia at gcc dot gnu dot org
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