Fail to build snap on riscv64

[zhsj]

The go snap fails to build on riscv64.

The build log is at https://launchpad.net/~go-snap-maintainers/+snap/go120/+build/2067566

The relevant part is

Cannot pack snap file: Command '['snap', 'pack', '--filename', 'go_1.20.2_riscv64.snap', '--compression', 'xz', PosixPath('/build/go/prime'), PosixPath('/build/go')]' returned non-zero exit status 20. (error: cannot pack "/build/go/prime": mksquashfs call failed: libgcc_s.so.1 must be installed for pthread_cancel to work)

I assume the mksquashfs command is from the snapcraft snap (or snapd snap?)? So it’s broken by missing libgcc_s.so.1?

Has anyone successfully built snaps with core22 on riscv64?

[ogra]

Have you tried simply adding libgcc (probably with an architecture flag for riscv64) to your build-packages to work around the blocker for the moment?

[zhsj]

I think it’s already there. I have build-essential in build-packages. It should brings libgcc-s1. And I can see libgcc-s1 is in the build log.

[sergiusens]

@mvo care to look into this?

[zhsj]

it’s already fixed 6 month ago, but not released in riscv64 branch.

ref:

snapcraft: update libgcc1->libgcc-s1

Merging release/2.58 into beta-riscv64

[zhsj]

Actually libgcc_s1 is in snapd’s snap

$ sudo find /snap/snapd/ -name libgcc_s.so.1
/snap/snapd/18440/lib/libgcc_s.so.1
/snap/snapd/18331/lib/libgcc_s.so.1

but the execution doesn’t include /lib path

ubuntu      1105 97.8  7.4 349004 73152 ttyS0    Sl+  07:47   4:35          \_ /snap/snapd/current/lib/riscv64-linux-gnu/ld-2.31.so --library-path /snap/snapd/current/usr/local/lib:/snap/sn
apd/current/usr/local/lib/riscv64-linux-gnu:/snap/snapd/current/lib/riscv64-linux-gnu:/snap/snapd/current/usr/lib/riscv64-linux-gnu /snap/snapd/current/usr/bin/mksquashfs . /home/ubuntu/go-
snap/prime/go_1.20.2_amd64.snap -noappend -comp xz -no-fragments -no-progress -wildcards -ef /tmp/.snap-pack-exclude-704354971 -all-root -no-xattrs 

[mvo]

I merged xnox branch in https://github.com/snapcore/snapd/pull/12616 and triggered a new build, hopefully that fixes the issue. Fwiw, in “edge” the problem is fixed so hopefully that is enough.

[zhsj]

@mvo sadly it fails to build… (not sure why apparmor part is dropped in beta-riscv64 branch… accident?)

The snapcraft.yaml in riscv64 branch is almost same with release branch, and the difference is guarded by riscv64 condition… so maybe it’s time to merge back?

[ernestl]

Hi zhsj,

The build works after another merge from mvo on 12 April.