Created attachment 842120 [details]
openssh_standard_ppc64_202009291700.log.gz

openssh ppc64 build failure undefined reference to `sshsk_sign'
as reported on OBS
https://build.opensuse.org/package/show/openSUSE:Factory:PowerPC/openssh

(no failure for ppc64le)

attached openssh_standard_ppc64_202009291700.log.gz extract:
===
[  120s]
/usr/lib64/gcc/powerpc64-suse-linux/10/../../../../powerpc64-suse-linux/bin/ld:
./libssh.a(sshkey.o): in function `sshkey_sign':
[  120s] /home/abuild/rpmbuild/BUILD/openssh-8.3p1/sshkey.c:2799: undefined
reference to `sshsk_sign'
[  120s] collect2: error: ld returned 1 exit status
===

If I compare with log of ppc64le that passed, I identified following
compilation options present in ppc64le but not ppc64:
===
-fmessage-length=0 -grecord-gcc-switches -flto=auto
===

I assume that no packages are build with LTO for ppc64.

If I force -flto=auto for ppc64 specifically for this package then the build
complete as per
https://build.opensuse.org/package/view_file/home:michel_mno:branches:network/openssh/openssh.changes?expand=1
BUT I am not sure this is the right thing to be done.