[LTP] [RFC PATCH v2 4/7] realtime/m4: Simplify exp10 check

[Petr Vorel]

> Yes, uclibc-ng still haven't defined exp10, thus still needed.
To correct myself, it has been added 5 years ago, in v1.0.27 (2017):
https://cgit.openadk.org/cgi/cgit/uclibc-ng.git/commit/?id=ea38f4d89c9698895b1cf53a5946429dc1d8bbaa.

And even before there was implementation from glibc in v1.0.12 (2016):
https://cgit.openadk.org/cgi/cgit/uclibc-ng.git/commit/?id=12a85731dc5fda3bc01ab19c82678b3bf122d794.

It'd be nice to see if there are toolchains which still use v1.0.12.

Kind regards,
Petr

> Link: https://github.com/linux-test-project/ltp/issues/13