Comment 7 for bug 1932010

------- Comment From <email address hidden> 2021-08-11 06:59 EDT-------
zlib1g_1.2.11.dfsg-2ubuntu7~ppa2_s390x.deb works fine, thanks!

# time -p env DFLTCC=0 python3 -c 'import gzip; gzip.decompress(gzip.compress(b"\x00" * 500000000, 1))'
real 2.59
user 2.23
sys 0.35

# dpkg -i zlib1g_1.2.11.dfsg-2ubuntu7~ppa2_s390x.deb

# time -p env DFLTCC=0 python3 -c 'import gzip; gzip.decompress(gzip.compress(b"\x00" * 500000000, 1))'
real 1.99
user 1.62
sys 0.36

However, I'm not quite sure why does

++#ifdef S390_CRC32_VX
++ if (getauxval(AT_HWCAP) & HWCAP_S390_VX)
++ return s390_crc32_vx;
++#endif

work. For me getauxval() causes a segfault when called from an ifunc, that's why I have to use the s390-specific ifunc's hwcap parameter.