[Bug c++/33581] New: OpenMP segmentation fault

[Bug c++/33581] New: OpenMP segmentation fault

[spollmann at gmail dot com]

The following code (a general case) generates a segmentation fault when
compiled with the -m32 and -fopenmp switch in gcc 4.2.1.  With the -m32 switch
removed, the program executes correctly.

#include <iostream>

int main()
{
  int x;

#pragma omp parallel for
  for (x = 0; x < 100; x++)
    {
      std::cout << x << std::endl;
    }
  return 0;
}

compile command line: /usr/local/gcc-4.2.1/bin/g++ --static -fopenmp -m32 -o
openMPTestProgram openMPTest.cpp

System:  SUSE 10 x64 linux distribution, 
(Dual-core Intel(R) Pentium(R) D CPU 2.80GHz system), 4GB ram

GCC configuration option: ../gcc-4.2.1/configure --prefix=/usr/local/gcc-4.2.1


-- 
           Summary: OpenMP segmentation fault
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: spollmann at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug c++/33581] OpenMP segmentation fault

[spollmann at gmail dot com]

------- Comment #1 from spollmann at gmail dot com  2007-09-28 08:22 -------
to clarify; the resultant executable of the test case above generates the
segmentation fault, not the compiler during compilation.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-09-28 09:36 -------
What happens if you don't use -static?


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2007-09-28 09:36 -------
-static is not really supported for glibc and pthreads/openmp.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |middle-end
           Keywords|                            |openmp


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[spollmann at gmail dot com]

------- Comment #4 from spollmann at gmail dot com  2007-09-29 07:04 -------
(In reply to comment #3)
> What happens if you don't use -static?

if static is not used (and the LD_LIBRARY_PATH points to the correct location
;)
the program seems to execute correctly.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[spollmann at gmail dot com]

------- Comment #5 from spollmann at gmail dot com  2007-09-29 07:10 -------
(In reply to comment #4)
> (In reply to comment #3)
> > What happens if you don't use -static?
> if static is not used (and the LD_LIBRARY_PATH points to the correct location
> ;)
> the program seems to execute correctly.

I didn't think that -static was causing the problem since the application seems
to execute correctly with the -m32 option removed, and with the -static
remaining.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2007-09-29 08:50 -------
(In reply to comment #5)
> I didn't think that -static was causing the problem since the application seems
> to execute correctly with the -m32 option removed, and with the -static
> remaining.

glibc is slightly different between the 32bit version and the 64bit version.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581

[Bug middle-end/33581] OpenMP segmentation fault

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2007-10-26 06:49 -------
Using -static for threaded programs is highly discouraged in glibc, for many
reasons.  If you want to do it anyway for whatever weird reason, you usually
need
to use -Wl,--whole-archive -lnptl -Wl,--no-whole-archive.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33581