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Hi, I'm new to OpenCV and I'm giving it a try.

I had compiled OpenCV 2.4.7 source in an old AMD Athlon 2.2 Ghz machine with Ubuntu.

The examples don't work, I receive SIGILL, illegal instruction for instruction cvtps2pd .

Is this an issue with cmake or anything related in the building process?

I've followed the instructions from http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html

wich lead to:

cd ~/opencv mkdir release cd release cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local .. make sudo make install

Here is the stack from GDB and some info on the machine.

====================================================
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Lendo símbolos de /home/usuario/opencv-2.4.7/release/bin/c-example-contours...(no debugging symbols found)...concluído.
(gdb) r
Starting program: /home/usuario/opencv-2.4.7/release/bin/c-example-contours
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

**Program received signal SIGILL, Illegal instruction.
0xb7bbe891 in cv::initInterTab2D(int, bool) ()**
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
**(gdb) bt**
#0  0xb7bbe891 in cv::initInterTab2D(int, bool) ()
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
#1  0xb7b10b05 in _GLOBAL__sub_I_imgwarp.cpp ()
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
#2  0xb7fed206 in call_init (env=0xbffff2dc, argv=0xbffff2d4, argc=1,
    l=<optimized out>) at dl-init.c:84
#3  call_init (l=<optimized out>, argc=1, argv=0xbffff2d4, env=0xbffff2dc)
    at dl-init.c:34
#4  0xb7fed2ec in _dl_init (main_map=0xb7fff938, argc=1, argv=0xbffff2d4,
    env=0xbffff2dc) at dl-init.c:133
#5  0xb7fdf1cf in _dl_start_user () from /lib/ld-linux.so.2
**(gdb) x/i 0xb7bbe891**
=> 0xb7bbe891 <_ZN2cvL14initInterTab2DEib+1041>:        **cvtps2pd %xmm0,%xmm7**
====================================================


lscpu

Arquitetura:           i686
Modo(s) operacional da CPU32-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per núcleo  1
Núcleo(s) por soquete:1
Soquete(s):            1
ID de fornecedor:      AuthenticAMD
Família da CPU:       6
Modelo:                8
Step:                  1
CPU MHz:               2200.131
BogoMIPS:              4400.26
cache de L1d:          64K
cache de L1i:          64K
cache de L2:           256K

====================================================
uname -a

Linux sempron2600 3.11.0-14-generic #21-Ubuntu SMP Tue Nov 12 17:07:40 UTC 2013 i686 athlon i686 GNU/Linux

====================================================

Hi, I'm new to OpenCV and I'm giving it a try.

I had compiled OpenCV 2.4.7 source in an old AMD Athlon 2.2 Ghz machine with Ubuntu.

The examples don't work, I receive SIGILL, illegal instruction for instruction cvtps2pd .

Is this an issue with cmake or anything related in the building process?

I've followed the instructions from http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html

wich lead to:

cd ~/opencv mkdir release cd release cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local .. make sudo make install

Here is the stack from GDB and some info on the machine.

====================================================
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Lendo símbolos de /home/usuario/opencv-2.4.7/release/bin/c-example-contours...(no debugging symbols found)...concluído.
 (gdb) r
Starting program: /home/usuario/opencv-2.4.7/release/bin/c-example-contours
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

**Program Program received signal SIGILL, Illegal instruction.
0xb7bbe891 in cv::initInterTab2D(int, bool) ()**
()
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
**(gdb) bt**

(gdb) bt

#0  0xb7bbe891 in cv::initInterTab2D(int, bool) ()
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
#1  0xb7b10b05 in _GLOBAL__sub_I_imgwarp.cpp ()
   from /home/usuario/opencv-2.4.7/release/lib/libopencv_imgproc.so.2.4
#2  0xb7fed206 in call_init (env=0xbffff2dc, argv=0xbffff2d4, argc=1,
    l=<optimized out>) at dl-init.c:84
#3  call_init (l=<optimized out>, argc=1, argv=0xbffff2d4, env=0xbffff2dc)
    at dl-init.c:34
#4  0xb7fed2ec in _dl_init (main_map=0xb7fff938, argc=1, argv=0xbffff2d4,
    env=0xbffff2dc) at dl-init.c:133
#5  0xb7fdf1cf in _dl_start_user () from /lib/ld-linux.so.2
**(gdb) 
(gdb) x/i 0xb7bbe891**
0xb7bbe891

=> 0xb7bbe891 <_ZN2cvL14initInterTab2DEib+1041>:        **cvtps2pd %xmm0,%xmm7**
cvtps2pd %xmm0,%xmm7
====================================================


lscpu

Arquitetura:           i686
Modo(s) operacional da CPU32-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per núcleo  1
Núcleo(s) por soquete:1
Soquete(s):            1
ID de fornecedor:      AuthenticAMD
Família da CPU:       6
Modelo:                8
Step:                  1
CPU MHz:               2200.131
BogoMIPS:              4400.26
cache de L1d:          64K
cache de L1i:          64K
cache de L2:           256K

====================================================
uname -a
cat /proc/version

Linux sempron2600 version 3.11.0-14-generic (buildd@akateko) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu8) ) #21-Ubuntu SMP Tue Nov 12 17:07:40 UTC 2013 i686 athlon i686 GNU/Linux

====================================================
2013

===================================================

cat /proc/cpuinfo

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 8
model name      : AMD Sempron(TM) 2600+
stepping        : 1
cpu MHz         : 2200.131
cache size      : 256 KB
fdiv_bug        : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow
bogomips        : 4400.26
clflush size    : 32
cache_alignment : 32
address sizes   : 34 bits physical, 32 bits virtual
power management: ts