ZSystems

libslirp fails to build on s390x:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:zSystems/libslirp/standard/s390x

[  148s] In file included from ../src/slirp.h:50,
[  148s]                  from ../src/cksum.c:34:
[  148s] ../src/ip6_icmp.h:66:5: error: expected ‘,’, ‘;’ or ‘}’ before ‘uint8_t’
[  148s]    66 |     uint8_t reserved_2;
[  148s]       |     ^~~~~~~

• add a patch to the package that fixes the syntax error
• submit the patch upstream (as PR)