Pdfium on CentOS

[UstimVV]

Describe the bug
When I try to import PDF into NAPS2 7.5.1 I ha

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Import'
2. Choose any pdf file
3. Click on 'Open'
4. See error: The file 'filename.pdf' could not be imported...
5. Technical details: System.Exception: Could not load library: "libpdfium.so". Error:
   see on screenshot
   

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop:

• OS: CentOS
• Version 7.5.1

[cyanfish]

What version of CentOS?

[UstimVV]

kernel version 6.6.51
centos 8

[sT331h0rs3]

I had such issue, when naps2 executable was incorrectly placed in /usr/bin directory instead of /usr/lib/naps2.
The error occurs because libpdfium.so is lazy-loaded from path ./_linux/libpdfium.so, relative to the naps2 executable. The full path is /usr/lib/naps2/_linux/libpdfium.so by default.

[UstimVV]

Executable naps2 I found in /usr/bin. I made symlink /usr/lib/naps2 -> /usr/lib64/naps2/ where I found file _linux/libpdfium.so. But I have the same error.

[sT331h0rs3]

Executable naps2 should be placed in /usr/lib/naps2 directory by default (could be /usr/lib64/naps2 in some distros as well).
File /usr/bin/naps2 might be a symlink to /usr/lib/naps2/naps2 though.

[cyanfish]

The other possibility is that Centos is using too old a glibc (2.28) for the pdfium build (it's supposed to only require 2.27 but I might have missed some change). I'll check later but if you want you can see what glibc version libpdfium.so depends on.
https://stackoverflow.com/questions/3436008/how-to-determine-version-of-glibc-glibcxx-binary-will-depend-on

[UstimVV]

1. Executable naps2 I put to diffrents places - no success.
2. glibc version now 2.36

[cyanfish]

What's the output of ldd /lib/naps2/_linux/libpdfium.so?

[cyanfish]

That's... odd. It works fine on my Fedora VM (which also uses the RPM). At some point I might try creating a CentOS VM and see if I can track it down but I'm not sure what the problem is.

[UstimVV]

Then I use version naps2-7.1.2 I can import pdf files and output is:

ldd /lib/naps2/_linux/libpdfium.so

linux-vdso.so.1 (0x00007ffe9c199000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fbe15ba5000)
libm.so.6 => /lib64/libm.so.6 (0x00007fbe15520000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fbe15b85000)
libc.so.6 => /lib64/libc.so.6 (0x00007fbe15343000)
/lib64/ld-linux-x86-64.so.2 (0x00007fbe15bc0000)

After update to version naps2-7.5.1 output is:

ldd /lib/naps2/_linux/libpdfium.so

ldd: warning: you do not have execute permissions `/lib/naps2/_linux/libpdfium.so'
linux-vdso.so.1 (0x00007ffea496a000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fea86bed000)
libm.so.6 => /lib64/libm.so.6 (0x00007fea86b0d000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fea86aed000)
libc.so.6 => /lib64/libc.so.6 (0x00007fea86423000)
/lib64/ld-linux-x86-64.so.2 (0x00007fea86c08000)

[UstimVV]

That's... odd. It works fine on my Fedora VM (which also uses the RPM). At some point I might try creating a CentOS VM and see if I can track it down but I'm not sure what the problem is.

Thank you

[UstimVV]

Import pdf files on Version 7.5.1-2 working exelent)