@section @code{fputs}
@findex fputs
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/fputs.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fputs.html}
-Gnulib module: stdio, sigpipe
+Gnulib module: stdio, nonblocking, sigpipe
-Portability problems fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{nonblocking}:
+@itemize
+@item
+When writing to a non-blocking pipe whose buffer is full, this function fails
+with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
+platforms:
+mingw.
+@end itemize
+
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}:
@itemize
@item
When writing to a pipe with no readers, this function fails, instead of
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
+@item
+On some platforms, this function does not set @code{errno} or the
+stream error indicator on attempts to write to a read-only stream:
+Cygwin 1.7.9.
@end itemize