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10.281 fetestexceptflag

Documentation:
https://www.gnu.org/software/libc/manual/html_node/Status-bit-operations.html.

Gnulib module: fenv-exceptions-state-c23

Portability problems fixed by Gnulib:

• This function is missing on all non-glibc platforms: glibc 2.24, macOS 14, FreeBSD 14.0, NetBSD 10.0, OpenBSD 6.7, Minix 3.1.8, AIX 7.1, HP-UX 11.31, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.

Portability problems not fixed by Gnulib: