isinff
------

Documentation:

  * Floating-Point Number Classification Functions (libc),

  * man isinff.

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: macOS 11.1, FreeBSD 14.0, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, mingw, MSVC 14, Android 4.4.

  * This function is not declared on some platforms: Android 9.0.