[SOLVED] Where is libjpeg.so.7 in centos 7 ?

Shaggy1 · 02-03-2021, 05:39 AM

System info:

Code:

$ cat /etc/centos-release 
CentOS Linux release 7.6.1810 (Core)

Code:

$ uname -a
Linux lb-cbga-eq 3.10.0-1062.1.1.el7.x86_64 #1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

---------------------
Hi

I have a centos 7 installation on which I tried to import wx in python and it came up with an error:
ImportError: libjpeg.so.7: cannot open shared object file: No such file or directory

And indeed it seems not to be there in the .so:
$ ldd python/3.7.1/lib/python3.7/site-packages/wx/_core.cpython-37m-x86_64-linux-gnu.so | grep libjpeg.so.7
libjpeg.so.7 => not found

From the other package names it looks like libjpeg.so.7 /lib64, but it is not. I cannot seem to find it anywhere. rpm does not know about it:

Code:

$ rpm -q --whatprovides /lib64/libjpeg.so.7
file /lib64/libjpeg.so.7 is not owned by any package

A grep for libjpeg in the repo xml file for centos 7.6.1810 results in the packages libjpeg-turbo and libjpeg-turbo-devel, both of which are installed, but neither of them seem to provide libjpeg.so.7:

Code:

$ rpm -ql libjpeg-turbo-devel.x86_64
/usr/include/jconfig.h
/usr/include/jerror.h
/usr/include/jmorecfg.h
/usr/include/jpeglib.h
/usr/lib64/libjpeg.so
/usr/lib64/pkgconfig/libjpeg.pc
/usr/share/doc/libjpeg-turbo-devel-1.2.90
/usr/share/doc/libjpeg-turbo-devel-1.2.90/coderules.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.90/example.c
/usr/share/doc/libjpeg-turbo-devel-1.2.90/jconfig.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.90/libjpeg.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.90/structure.txt

Code:

$ rpm -ql libjpeg-turbo.x86_64
/usr/lib64/libjpeg.so.62
/usr/lib64/libjpeg.so.62.1.0
/usr/share/doc/libjpeg-turbo-1.2.90
/usr/share/doc/libjpeg-turbo-1.2.90/ChangeLog.txt
/usr/share/doc/libjpeg-turbo-1.2.90/README
/usr/share/doc/libjpeg-turbo-1.2.90/README-turbo.txt
/usr/share/doc/libjpeg-turbo-1.2.90/change.log

My more global searches for the library have so far also drawn a blank.

Does anyone know where I can get hold of libjpeg.so.7 for centos 7 from ? Or what package is it included in ?

knudfl · 02-03-2021, 09:16 AM

"libjpeg7" is an old version, year ~2010.

Current versions are libjpeg-turbo → libjpeg.so.62, and some OS have "libjpeg9".

libjpeg.so.7 : Get the source http://archive.debian.org/debian-arc..._7.orig.tar.gz

Code:

$ cd jpeg-7/
$ ./configure && make
    // Then copy jpeg-7/.libs/libjpeg.so.7.0.0 to /usr/lib64/, and create the link:
# ln -s libjpeg.so.7.0.0 libjpeg.so.7

Shaggy1 · 02-04-2021, 09:04 AM

Thank you very much for the reply.
Yes that seemed to work and I can now import wx.

If it is an old version I'm wondering how I've got a python library that depends on it (I assumed ti was a newer version).
Maybe need to do some upgrading somewhere.

Thank you for you help solving the immediate issue.