GNU Gnulib: vdprintf

Gnulib module: vdprintf or vdprintf-posix

Portability problems fixed by either Gnulib module vdprintf or vdprintf-posix:

This function is missing on some 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.

Portability problems fixed by Gnulib module vdprintf-posix:

This function does not support size specifiers as in C99 (hh, ll, j, t, z) on some platforms: BeOS.
printf of ‘long double’ numbers is unsupported on some platforms: BeOS.
This function does not support the ‘a’ and ‘A’ directives on some platforms: glibc-2.3.6, BeOS.
This function does not support the ‘F’ directive on some platforms: BeOS.
This function does not support format directives that access arguments in an arbitrary order, such as "%2$s", on some platforms: BeOS.
This function does not support precisions larger than 512 or 1024 in integer, floating-point and pointer output on some platforms: AIX 7.1, BeOS.

Portability problems not fixed by Gnulib:

Formatting noncanonical ‘long double’ numbers produces nonmeaningful results on some platforms: glibc and others, on x86, x86_64, IA-64 CPUs.
When formatting an integer with grouping flag, this function inserts thousands separators even in the "C" locale on some platforms: NetBSD 5.1.
On some platforms, this function does not set errno or the stream error indicator on attempts to write to a read-only stream: Cygwin 1.7.9.