@node setvbuf
@subsection @code{setvbuf}
@findex setvbuf

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/setvbuf.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
@item
On Windows platforms (excluding Cygwin), @code{_IOLBF} (line-buffering)
is treated as if it were @code{_IOFBF} (full buffering),
possibly with a warning generated.
@end itemize
