root@spook:~/test/tema2-checker-lin# gdb --args ./mpirun -np 6 _test/bin/test_matrix_multiply
GNU gdb (GDB) 7.2-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /root/test/tema2-checker-lin/mpirun...done.
(gdb) set follow-fork-mode child
(gdb) r
Starting program: /root/test/tema2-checker-lin/mpirun -np 6 _test/bin/test_matrix_multiply
[Thread debugging using libthread_db enabled]
[New process 6494]
[Thread debugging using libthread_db enabled]
start: _test/bin/test_matrix_multiply 0 6
process 6494 is executing new program: /root/test/tema2-checker-lin/_test/bin/test_matrix_multiply
start: _test/bin/test_matrix_multiply 5 6
start: _test/bin/test_matrix_multiply 3 6
start: _test/bin/test_matrix_multiply 4 6
start: _test/bin/test_matrix_multiply 2 6
start: _test/bin/test_matrix_multiply 1 6
[Thread debugging using libthread_db enabled]
success
success
success
success
success

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7e536c0 (LWP 6494)]
__memcpy_ssse3 () at ../sysdeps/i386/i686/multiarch/memcpy-ssse3.S:160
160	../sysdeps/i386/i686/multiarch/memcpy-ssse3.S: No such file or directory.
	in ../sysdeps/i386/i686/multiarch/memcpy-ssse3.S