Is there a backport of libsquashfs1 back to focal? building stacker / umoci for Ubuntu focal

[bogdanbiv]

side note: Granted, this is a problem with Ubuntu not having a backported lib from jammy / hirsuite and my use of an outdated Ubuntu install. However, if anyone has any idea, please do share it.

~/Projects/squashfs$ make
go build ./...
go: downloading github.com/urfave/cli/v2 v2.2.0
go: downloading golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
go: downloading github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d
# pkg-config --cflags  -- libsquashfs1
pkg-config: exec: "pkg-config": executable file not found in $PATH

####
~/Projects/squashfs$ make
go build ./...
# pkg-config --cflags  -- libsquashfs1
Package libsquashfs1 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libsquashfs1.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libsquashfs1' found
pkg-config: exit status 1
make: *** [Makefile:17: .build] Error 2

Is there a backport of libsquashfs1 back to focal? I am trying to build umoci in order to build stacker for my Ubuntu Focal.
https://packages.ubuntu.com/search?keywords=squash

[smoser]

The setup file will get everything necessary. if that does not work on 20.04, or 22.04, we shoudl make that happen.

Then you can just call ./setup /usr/local

For what it is worth, c-i builds on ubuntu-20.04 (see .github/workflows/build.yml)

is there anything else you need here?