[Bug libstdc++/107636] [13 regression] r13-3761-ga239a63f868e29 breaks build on powerpc64le with __float128 support

[enrico.seiler+gccbugs at outlook dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107636

--- Comment #1 from Enrico Seiler <enrico.seiler+gccbugs at outlook dot com> ---
The `#define`s can also be omitted. Then the error will occur when compiling
with -std=c++23