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@node putc
@section @code{putc}
@findex putc

POSIX specification: @url{http://www.opengroup.org/susv3xsh/putc.html}

Gnulib module: stdio, sigpipe

Portability problems fixed by Gnulib:
@itemize
@item
When writing to a pipe with no readers, this function fails, instead of
obeying the current @code{SIGPIPE} handler, on some platforms:
mingw.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
@end itemize