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@node dprintf
@section @code{dprintf}
@findex dprintf
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/dprintf.html}
Gnulib module: dprintf or dprintf-posix
Portability problems fixed by either Gnulib module @code{dprintf} or @code{dprintf-posix}:
@itemize
@item
This function is missing on many non-glibc platforms:
Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11,
IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
@end itemize
Portability problems fixed by Gnulib module @code{dprintf-posix}:
@itemize
@item
printf of @samp{long double} numbers outside the IEEE 754 range produces
no meaningful results on some platforms:
glibc and others, on x86, x86_64, IA-64 CPUs.
@item
This function does not support the @samp{a} and @samp{A} directives on some
platforms:
glibc-2.3.6.
@item
This function does not support precisions larger than 512 or 1024 in integer,
floating-point and pointer output on some platforms:
AIX 7.1.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
When formatting an integer with grouping flag, this function inserts thousands
separators even in the "C" locale on some platforms:
NetBSD 5.1.
@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
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