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13.38.4 register_printf_function

Documentation:
https://www.gnu.org/software/libc/manual/html_node/Registering-New-Conversions.html.

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• This function is missing on many non-glibc platforms: macOS 11.1, FreeBSD 6.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 2.9, mingw, MSVC 14, Android 9.0.