Missing lgamma@GLIBC_2.23 and lgammaf@GLIBC_2.23 polyfill when targeting GLIBC 2.17

[zadokstorkey]

I am trying to polyfill an application to work with GLIBC_2.17 but am getting the following error:

-bash-4.2$ polyfill-glibc --target-glibc=2.17 ./libsycl.so.8
Cannot change target version of ./libsycl.so.8 to 2.17 (x86_64) due to missing knowledge about how to handle:
  lgamma@GLIBC_2.23
  lgammaf@GLIBC_2.23

I would presume this indicates that those symbols are not currently supported for the version I'm targeting.

Would you be able to suggest a workaround or add support for these?

Many thanks.