[Bug c/81156] GCC fails to compile a formula with tgmath.h

[equilibrium556 at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81156

--- Comment #5 from equilibrium556 at gmx dot de ---
I filed a bug report for glibc as well:
https://sourceware.org/bugzilla/show_bug.cgi?id=21660