This adds support for building on Plan 9 x86-32.  The compat/plan9
directory contains these items:

- replacements for the 'head' and 'printf' shell commands
- wrapper for main() to disable FPU exceptions

Larger required changes to the system are described in the
documentation.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The glibc definitions of INFINITY and NAN do not work with the
tms470 compiler, nor do our usual fallbacks.

Signed-off-by: Mans Rullgard <mans@mansr.com>

All versions of MinGW-w64 prior to version 3, as well as
all versions of MinGW32 have broken implementations of
vsnprintf.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This conforms to C99, but requires Windows >= XP.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This conforms to C99, but requires Windows >= XP.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

This reverts commit ba537202.
A better implementation has been commited by the same author to qatar

Conflicts:

	configure

Found-by: jamal <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

This allows compiling and running these tests on systems lacking a built-
in version of getopt(), such as MSVC.

Signed-off-by: Anton Khirnov <anton@khirnov.net>