got "undefined symbol omp_get_thread_num" while try example "extracting orientation from Tesseract 4.0"

[Mike Zang]

Got "undefined symbol omp_get_thread_num" while try API example "extracting orientation from Tesseract 4.0" with python and tesseract-master.

Help!

Ok using tesseract command line. 

Does that mean there is some problem with my python (both 2.6 and 3.4 not work) or some other environment issues？

[Mike Zang]

I update gcc to 4.8.5 to support c++ 11 before compile and install tesseract. I tried api example with 4.0 failed in this page - https://github.com/tesseract-ocr/tesseract/wiki/APIExample#c-api-in-python.

OS is Centos 6,  I compile and install tessearct exactly the way as the wiki page writes,  and I tried reinstall cffi lib of python which didn't work. Do I need to recompile&install my python with new gcc4.8 or something alse?

Somebody help!



在 2017年5月6日星期六 UTC+8下午11:40:56，Mike Zang写道：

[ShreeDevi Kumar]

Most probably the API example has not been updated for tesseract 4.

There have been many changes - 

Please see https://abi-laboratory.pro/tracker/timeline/tesseract/

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

--
You received this message because you are subscribed to the Google Groups "tesseract-ocr" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.
To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.
To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/4fedfab4-9edd-4eb0-b3ce-ab3ef8ec4f83%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Zdenko Podobný]

His error has nothing to do with API example.

He has problem related to linking (replaced gcc after compilation?)

Zdenko

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAG2NduVeeMaFBXmiKxDxHZk-b--W3ZaswUD-ZunOY-k-Zijp_Q%40mail.gmail.com.

[Mike Zang]

I do replace gcc just before compilation of tesseract. I wonder if need to recompile python or the lib cffi (the example used to call c api in python). Would python or cffi cause that error?

I'm not that familiar with C/C++ and also thanks for the reply.

在 2017年5月7日星期日 UTC+8下午10:13:28，zdenop写道：

His error has nothing to do with API example.

He has problem related to linking (replaced gcc after compilation?)

Zdenko

On Sun, May 7, 2017 at 2:14 PM, ShreeDevi Kumar <shree...@gmail.com> wrote:

Most probably the API example has not been updated for tesseract 4.

There have been many changes - 

Please see https://abi-laboratory.pro/tracker/timeline/tesseract/

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Sun, May 7, 2017 at 5:36 PM, Mike Zang <mikez...@gmail.com> wrote:

I update gcc to 4.8.5 to support c++ 11 before compile and install tesseract. I tried api example with 4.0 failed in this page - https://github.com/tesseract-ocr/tesseract/wiki/APIExample#c-api-in-python.

OS is Centos 6,  I compile and install tessearct exactly the way as the wiki page writes,  and I tried reinstall cffi lib of python which didn't work. Do I need to recompile&install my python with new gcc4.8 or something alse?

Somebody help!



在 2017年5月6日星期六 UTC+8下午11:40:56，Mike Zang写道：

Got "undefined symbol omp_get_thread_num" while try API example "extracting orientation from Tesseract 4.0" with python and tesseract-master.

Help!

Ok using tesseract command line. 

Does that mean there is some problem with my python (both 2.6 and 3.4 not work) or some other environment issues？

--
You received this message because you are subscribed to the Google Groups "tesseract-ocr" group.

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-oc...@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.
To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/4fedfab4-9edd-4eb0-b3ce-ab3ef8ec4f83%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "tesseract-ocr" group.

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-oc...@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

[ShreeDevi Kumar]

​Have you updated the following in the example to the path in your setup ...

PATH_TO_LIBTESS = '/path/to/development/libtesseract.so'​

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/937ec061-d690-41bb-9022-2b9fd9d9ad21%40googlegroups.com.

[Zdenko Podobný]

IMO it depends how to "replaced" gcc. If you used standard tools of your distribution (rpm/apt-get etc) - they should take care about all dependencies. Otherwise you will need to recompile a lot of things. Changing compiler (with change of of the major version of it) is significant change of system.

BTW: omp_get_thread_num is provided by gcc/libcomp[1] as part of OpenMP implementation, so make sure that your gcc replacement provide this feature.

[1] https://gcc.gnu.org/onlinedocs/libgomp/omp_005fget_005fthread_005fnum.html

Zdenko

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/937ec061-d690-41bb-9022-2b9fd9d9ad21%40googlegroups.com.