with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
platforms:
mingw.
+@item
+When writing to a non-blocking pipe on which no reader is currently waiting
+an amount of bytes that exceeds the pipe buffer's size, then -- even if the
+pipe's buffer is empty -- this function fails, instead of performing a partial
+write into the pipe buffer, on some platforms:
+mingw.
@end itemize
Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}: