Error while loading shared libraries: libpng12.so.0: wrong ELF class: ELFCLASS64

Thermal_insulator

12/29/23, 8:30 AM

I am trying to run Quartus 13 on Ubuntu 22.04 (64-bit) and like many other people the libpng12.so.0 is not allowing it to run. First it could not the file. Then I downloaded and installed the package from an answer to another question, then placed the file manually in the Quartus installation folder so the error changed to:

quartus: error while loading shared libraries: libpng12.so.0: wrong ELF class: ELFCLASS64

The installation folder of Quartus has the path: /home/developer/n/quartus/bin

Now I asked this question because many of the solutions worked fine till Ubuntu 21. I need a fix for Ubuntu 22.04 for a 32-bit libpng12 package (I presume this is why the ELF class error occurs).

The command find -name libpng12 returns:

./usr/local/lib/libpng12.so.0
./usr/lib/x86_64-linux-gnu/libpng12.so.0
./home/developer/n/libpng/.libs/libpng12.so.0
./root/libpng-1.2.54/.libs/libpng12.so.0
find: ‘./run/user/1000/doc’: Permission denied
find: ‘./run/user/1000/gvfs’: Permission denied
./snap/core/14399/lib/x86_64-linux-gnu/libpng12.so.0
./snap/core/14399/usr/lib/x86_64-linux-gnu/libpng12.so.0

I copied all of them one by one to /quartus/bin and every time I got the same ELFCLASS error.

I also tried putting the path of libpng12 in ld.so.conf file in /etc then ran ldconfig but still the same problem. I have tried these answers:

Install libpng12 on ubuntu 22.04

https://bbs.archlinux.org/viewtopic.php?id=212077

https://community.intel.com/t5/Programmable-Devices/Quartus-can-t-find-shared-library/td-p/161251

error while loading shared libraries: libpng12.so.0

This no longer works: sudo apt-get install libpng12-0:i386

This package isnt available any more: https://packages.ubuntu.com/xenial/i386/libpng12-0/download

How do I get my software to run?

583

1 + 0

libpng

22.04

Score:1

Ubuntu

Thermal_insulator

1/2/24, 12:43 PM

This works flawlessly on 64-bit Ubuntu 22.04:

sudo apt-get install libpng12-0

This installs the 64-bit libpng12 version needed by Quartus 13. Go to /bin folder of your Quartus installation. My path was this:

/root/altera/13.0sp1/quartus/bin

Then run this:

./quartus --64bit

+ 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Error while loading shared libraries: libpng12.so.0: wrong ELF class: ELFCLASS64

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