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.
+mingw, MSVC 9.
@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.
+mingw, MSVC 9.
@end itemize
Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}:
When writing to a pipe with no readers, this function fails with error
@code{EINVAL}, instead of obeying the current @code{SIGPIPE} handler, on
some platforms:
-mingw.
+mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib: