cross-s390x-binutils from home:MaxxedSUSE:Compiler-Tools-15.6 project
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Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MaxxedSUSE:Compiler-Tools-15.6/15.6/home:MaxxedSUSE:Compiler-Tools-15.6.repo zypper refresh zypper install cross-s390x-binutils