tachyon runtime errors related to libpng

[mkoeppe]

On virtually all Linux platforms that use the tachyon SPKG.

  [sagemath_doc_html-none]   [spkg-install] tachyon: error while loading shared libraries: libpng16.so.16: cannot open shared object file: No such file or directory

for example Ubuntu:

• minimal / linux (ubuntu-noble, minimal)

The libpng upgrade in #30564 does not fix it: minimal / linux (ubuntu-noble, minimal)

[mkoeppe]

$ docker run -it ghcr.io/mkoeppe/sage/sage-debian-bookworm-minimal-with-targets-pre:ci-37434-38510-11 bash
Unable to find image 'ghcr.io/mkoeppe/sage/sage-debian-bookworm-minimal-with-targets-pre:ci-37434-38510-11' locally
ci-37434-38510-11: Pulling from mkoeppe/sage/sage-debian-bookworm-minimal-with-targets-pre
Digest: sha256:5445fe0ac3922499ea8a19566388d3cf4521084da240fb319755583df2e638b6
Status: Downloaded newer image for ghcr.io/mkoeppe/sage/sage-debian-bookworm-minimal-with-targets-pre:ci-37434-38510-11
root@e55f23b51528:/sage# ./sage -sh 

Starting subshell with Sage environment variables set.  Don't forget
to exit when you are done.  Beware:
 * Do not do anything with other copies of Sage on your system.
 * Do not use this for installing Sage packages using "sage -i" or for
   running "make" at Sage's root directory.  These should be done
   outside the Sage shell.

Bypassing shell configuration files...

Note: SAGE_ROOT=/sage
(sage-sh) root@e55f23b51528:sage$ tachyon 
tachyon: error while loading shared libraries: libpng16.so.16: cannot open shared object file: No such file or directory
(sage-sh) root@e55f23b51528:sage$ which tachyon
/sage/local/bin/tachyon
(sage-sh) root@e55f23b51528:sage$ ldd `which tachyon`
	linux-vdso.so.1 (0x00007ffdc7f3f000)
	libpng16.so.16 => not found
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fe088fd8000)
	libmvec.so.1 => /lib/x86_64-linux-gnu/libmvec.so.1 (0x00007fe088edf000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe088cfe000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fe08913e000)
(sage-sh) root@e55f23b51528:sage$ ls /usr/lib/libpng*
ls: cannot access '/usr/lib/libpng*': No such file or directory
(sage-sh) root@e55f23b51528:sage$ ls local/lib/libpng*
local/lib/libpng.so  local/lib/libpng16.so  local/lib/libpng16.so.16  local/lib/libpng16.so.16.29.0

[mkoeppe]

For downstream patches - see links in https://groups.google.com/g/sage-devel/c/pj76chTb348