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Bug#551088: marked as done (gfortran-4.4: Segmentation fault of various fortran programs with OpenMP)

Your message dated Wed, 30 Dec 2009 12:00:33 +0100
with message-id <4B3B32D1.8030008@debian.org>
and subject line Re: Bug#551088: moreinfo
has caused the Debian Bug report #551088,
regarding gfortran-4.4: Segmentation fault of various fortran programs with OpenMP
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
551088: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=551088
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gfortran-4.4
Version: 4.4.1-6
Severity: important

I have used gfortran-4.4 to compile various fortran programs. The programs run correctly without 
the -fopenmp flag. If I compile these programs with gfortran-4.2 and with the flag -fopenmp, 
the programs run correctly. Nevertheless, if I compile these programs with gfortran-4.4 with the OpenMP flag 
(-fopenmp) I get a segmentation fault when the programs are started.  If I compile the same program with the 
debug flag (-g) and I run the program, I get the following messages

gdb ./hfint_cluster.m 
GNU gdb (GDB) 6.8.50.20090628-cvs-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
(gdb) run
Starting program: /home/stefano/calcoli_korg/run/hfint_cluster.m 
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
MAIN__ () at hfint_cluster.f:1
1	      IMPLICIT REAL*8 (A-H,O-Z)



-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages gfortran-4.4 depends on:
ii  gcc-4.4                   4.4.1-6        The GNU C compiler
ii  gcc-4.4-base              4.4.1-6        The GNU Compiler Collection (base 
ii  libc6                     2.9-23         GNU C Library: Shared libraries
ii  libc6-dev                 2.9-23         GNU C Library: Development Librari
ii  libgfortran3              4.4.1-6        Runtime library for GNU Fortran ap
ii  libgmp3c2                 2:4.3.1+dfsg-3 Multiprecision arithmetic library
ii  libmpfr1ldbl              2.4.1-2        multiple precision floating-point 

gfortran-4.4 recommends no packages.

Versions of packages gfortran-4.4 suggests:
pn  gfortran-4.4-doc              <none>     (no description available)
pn  gfortran-4.4-multilib         <none>     (no description available)
pn  libgfortran3-dbg              <none>     (no description available)

-- no debconf information

--- End Message ---
--- Begin Message --- 
tags 551088 - moreinfo
thanks

On 30.12.2009 10:16, Stefano Simonucci wrote:

I provide the following test case (Fortran 77):

stefano@debsim2:~/prova$ cat test.f
       program test
       double precision a(10000000)
       a(1)=1
       write(6,*) a(1)
       stop
       end
stefano@debsim2:~/prova$ gfortran-4.4 -fopenmp -o test test.f
stefano@debsim2:~/prova$ ./test
Segmentation fault
you have to write your program to use OpenMP. it doesn't parallelize automatically. please search the web for some OpenMP fortran examples and/or have a look at the gomp manual. 

http://gcc.gnu.org/onlinedocs/gcc-4.4.2/libgomp/

closing the report.

--- End Message ---
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