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@node putchar_unlocked
@section @code{putchar_unlocked}
@findex putchar_unlocked

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/putchar_unlocked.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@item
This function cannot be called from plain inline or extern inline
functions on some platforms:
OS X 10.8.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, mingw, MSVC 14.
@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