Latest PassMark on Linux gives an error

[jwst]

[performance]$ ./pt_linux_x64
./pt_linux_x64: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by ./pt_linux_x64)
[performance]$

[performance]$ strings /lib64/libstdc++.so.6 | grep GLIBCXX_3.4.
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
[ performance]$

How do I fix this?

[David.K (Passmark)]

Your version of libstdc++ is unsupported, you can either update your OS or use the legacy version at the bottom of this page. The legacy version only supports the CPU test suite, it does not include the memory tests.