in reply to Re: How to link to OpenCV goodies for PERL5
in thread How to link to OpenCV goodies for PERL5

I ran /usr/bin/nm and it reads that cvLoad and cvLoadImage are Undefined. That can't be good.

I originally loaded opencv via the instructions at opencv and then later followed the instructions found here:

http://linuxgazette.net/176/misc/lg/face_detection_in_perl.html

I tried cpan Image::ObjectDetect again and it tells me that it is installed and up to date.

I would try to make manually against the source, but I don't know where the source is. I found this to help me:

http://world.std.com/~swmcd/steven/perl/module_mechanics.html#TOC19

When I google for more information I get this thread...

Thanks for your help, I will change the printing if it ever works ;)

  • Comment on Re^2: How to link to OpenCV goodies for PERL5

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Re^3: How to link to OpenCV goodies for PERL5
by hbm (Hermit) on Jun 09, 2013 at 18:53 UTC

    When you install modules with CPAN, the source is first downloaded to your .cpan directory - should be in the home directory of whatever account you installed with.

    1. 'find' or 'locate' the source (under the author)
    2. Change to that directory
    3. /path/to/perl Makefile.PL
    4. make > make.log 2>&1

    Hopefully make.log will then get you closer to the root cause.

[reply]

      Thank you for your help. I did what you said and here is what was outputted into make.log:

      freddythunder@tacofever:~/cpan/objdetectsrc$ more make.log
cp lib/Image/ObjectDetect.pm blib/lib/Image/ObjectDetect.pm
cp lib/Image/ObjectDetect.xs blib/lib/Image/ObjectDetect.xs
/usr/bin/perl /usr/share/perl/5.14/ExtUtils/xsubpp  -typemap /usr/shar
+e/perl/5.14/ExtUtils/typemap  ObjectDetect.xs > ObjectDetect.xsc && m
+v ObjectDetect.
xsc ObjectDetect.c
cc -c   -I/usr/local/include/opencv -I/usr/local/include  -Isrc -I/usr
+/local/include/opencv -I/usr/local/include   -O2 -g   -DVERSION=\"0.1
+2\" -DXS_VERSIO
N=\"0.12\" -fPIC "-I/usr/lib/perl/5.14/CORE"   ObjectDetect.c
Running Mkbootstrap for Image::ObjectDetect ()
chmod 644 ObjectDetect.bs
rm -f blib/arch/auto/Image/ObjectDetect/ObjectDetect.so
cc  -shared -L/usr/local/lib -fstack-protector ObjectDetect.o  -o blib
+/arch/auto/Image/ObjectDetect/ObjectDetect.so     \
             \
      
chmod 755 blib/arch/auto/Image/ObjectDetect/ObjectDetect.so
cp ObjectDetect.bs blib/arch/auto/Image/ObjectDetect/ObjectDetect.bs
chmod 644 blib/arch/auto/Image/ObjectDetect/ObjectDetect.bs
Manifying blib/man3/Image::ObjectDetect.3pm

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      I also had read somewhere about 'make test' which I remember the output of that happening before (but I don't remember at what point) but the test fails:

      freddythunder@tacofever:~/cpan/objdetectsrc$ make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_h
+arness(0, 'blib/lib', 'blib/arch')" t/*.t
t/00_compile.t .. 1/2 
#   Failed test 'use Image::ObjectDetect;'
#   at t/00_compile.t line 7.
#     Tried to use 'Image::ObjectDetect'.
#     Error:  Can't load '/home/freddythunder/cpan/objdetectsrc/blib/a
+rch/auto/Image/ObjectDetect/ObjectDetect.so' for module Image::Object
+Detect: /home/freddythunder/cpan/objdetectsrc/blib/arch/auto/Image/Ob
+jectDetect/ObjectDetect.so: undefined symbol: cvHaarDetectObjects at 
+/usr/lib/perl/5.14/DynaLoader.pm line 184.
#  at /home/freddythunder/cpan/objdetectsrc/blib/lib/Image/ObjectDetec
+t.pm line 19
# BEGIN failed--compilation aborted at /home/freddythunder/cpan/objdet
+ectsrc/blib/lib/Image/ObjectDetect.pm line 19.
# Compilation failed in require at (eval 4) line 2.
# BEGIN failed--compilation aborted at (eval 4) line 2.

#   Failed test 'Image::ObjectDetect->can('xs_detect')'
#   at t/00_compile.t line 8.
#     Image::ObjectDetect->can('xs_detect') failed
# Looks like you failed 2 tests of 2.
t/00_compile.t .. Dubious, test returned 2 (wstat 512, 0x200)
Failed 2/2 subtests 
t/01_detect.t ... Can't load '/home/freddythunder/cpan/objdetectsrc/bl
+ib/arch/auto/Image/ObjectDetect/ObjectDetect.so' for module Image::Ob
+jectDetect: /home/freddythunder/cpan/objdetectsrc/blib/arch/auto/Imag
+e/ObjectDetect/ObjectDetect.so: undefined symbol: cvHaarDetectObjects
+ at /usr/lib/perl/5.14/DynaLoader.pm line 184.
 at /home/freddythunder/cpan/objdetectsrc/blib/lib/Image/ObjectDetect.
+pm line 19
BEGIN failed--compilation aborted at /home/freddythunder/cpan/objdetec
+tsrc/blib/lib/Image/ObjectDetect.pm line 19.
Compilation failed in require at t/01_detect.t line 5.
BEGIN failed--compilation aborted at t/01_detect.t line 5.
t/01_detect.t ... Dubious, test returned 255 (wstat 65280, 0xff00)
No subtests run 

Test Summary Report
-------------------
t/00_compile.t (Wstat: 512 Tests: 2 Failed: 2)
  Failed tests:  1-2
  Non-zero exit status: 2
t/01_detect.t (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: No plan found in TAP output
Files=2, Tests=2,  0 wallclock secs ( 0.09 usr  0.02 sys +  0.14 cusr 
+ 0.04 csys =  0.29 CPU)
Result: FAIL
Failed 2/2 test programs. 2/2 subtests failed.
make: *** [test_dynamic] Error 255

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        What do you get as output of pkg-config opencv --libs

        It seems suspicious that your make log lacks some form of -lopencv or libopencv.a or some such

        seems odd that you'd have ...include/opencv but no libopencv

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