feholdexcept
============

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/feholdexcept.html

Gnulib module: fenv-environment

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: FreeBSD 5.2.1, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, IRIX 6.5, Solaris 9, Cygwin 1.7.7, MSVC 9, Android 4.4.

  * This function does not work on some platforms: glibc 2.5, FreeBSD 12.2/arm64.

  * This function does not save the exception trap bits on some platforms: AIX 7.3.

  * This function does not clear the exception trap bits on some platforms: musl libc, mingw.

  * This function may fail on some platforms: MSVC 14.

Portability problems not fixed by Gnulib: