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10.966 roundl

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

Gnulib module: roundl or roundl-ieee

Portability problems fixed by either Gnulib module roundl or roundl-ieee:

• This function is missing on some platforms: FreeBSD 5.2.1, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, Solaris 9, Cygwin 1.7.x, MSVC 9.
• This function is not declared on some platforms: glibc 2.8.

Portability problems fixed by Gnulib module roundl-ieee:

• This function returns a positive zero for an argument between -0.5 and 0 on some platforms: AIX 7.1.

Portability problems not fixed by Gnulib: