ffprobe: implement subsection field selection through the -show_entries option

[ffmpeg] / doc / platform.texi

diff --git a/doc/platform.texi b/doc/platform.texi
index 68e23bf7c170556933460d7dd7fe67c589ae019f..dcdfff20d70890238d9bedb8f556a5b8a8a67252 100644 (file)
--- a/doc/platform.texi
+++ b/doc/platform.texi
@@ -1,8 +1,8 @@
 \input texinfo @c -*- texinfo -*-
 
-@settitle Platform Specific information
+@settitle Platform Specific Information
 @titlepage
-@center @titlefont{Platform Specific information}
+@center @titlefont{Platform Specific Information}
 @end titlepage
 
 @top
@@ -77,8 +77,7 @@ For information about compiling FFmpeg on OS/2 see
 @chapter Windows
 
 To get help and instructions for building FFmpeg under Windows, check out
-the FFmpeg Windows Help Forum at
-@url{http://ffmpeg.arrozcru.org/}.
+the FFmpeg Windows Help Forum at @url{http://ffmpeg.zeranoe.com/forum/}.
 
 @section Native Windows compilation using MinGW or MinGW-w64
 
@@ -115,7 +114,7 @@ wrapper.
 You will need the following prerequisites:
 
 @itemize
-@item @uref{https://github.com/rbultje/c99-to-c89/, C99-to-C89 Converter & Wrapper}
+@item @uref{https://github.com/libav/c99-to-c89/, C99-to-C89 Converter & Wrapper}
 @item @uref{http://code.google.com/p/msinttypes/, msinttypes}
 @item @uref{http://www.mingw.org/, MSYS}
 @item @uref{http://yasm.tortall.net/, YASM}
@@ -143,7 +142,7 @@ make
 make install
 @end example
 
-If you wish to compile static libraries, add @code{--enable-shared} to your
+If you wish to compile shared libraries, add @code{--enable-shared} to your
 configure options. Note that due to the way MSVC handles DLL imports and
 exports, you cannot compile static and shared libraries at the same time, and
 enabling shared libraries will automatically disable the static ones.
@@ -304,4 +303,67 @@ and for a build with shared libraries
 ./configure --target-os=mingw32 --enable-shared --disable-static --extra-cflags=-mno-cygwin --extra-libs=-mno-cygwin
 @end example
 
+@chapter Plan 9
+
+The native @uref{http://plan9.bell-labs.com/plan9/, Plan 9} compiler
+does not implement all the C99 features needed by FFmpeg so the gcc
+port must be used.  Furthermore, a few items missing from the C
+library and shell environment need to be fixed.
+
+@itemize
+
+@item GNU awk, grep, make, and sed
+
+Working packages of these tools can be found at
+@uref{http://code.google.com/p/ports2plan9/downloads/list, ports2plan9}.
+They can be installed with @uref{http://9front.org/, 9front's} @code{pkg}
+utility by setting @code{pkgpath} to
+@code{http://ports2plan9.googlecode.com/files/}.
+
+@item Missing/broken @code{head} and @code{printf} commands
+
+Replacements adequate for building FFmpeg can be found in the
+@code{compat/plan9} directory.  Place these somewhere they will be
+found by the shell.  These are not full implementations of the
+commands and are @emph{not} suitable for general use.
+
+@item Missing C99 @code{stdint.h} and @code{inttypes.h}
+
+Replacement headers are available from
+@url{http://code.google.com/p/plan9front/issues/detail?id=152}.
+
+@item Missing or non-standard library functions
+
+Some functions in the C library are missing or incomplete.  The
+@code{@uref{http://ports2plan9.googlecode.com/files/gcc-apelibs-1207.tbz,
+gcc-apelibs-1207}} package from
+@uref{http://code.google.com/p/ports2plan9/downloads/list, ports2plan9}
+includes an updated C library, but installing the full package gives
+unusable executables.  Instead, keep the files from @code{gccbin.tgz}
+under @code{/386/lib/gnu}.  From the @code{libc.a} archive in the
+@code{gcc-apelibs-1207} package, extract the following object files and
+turn them into a library:
+
+@itemize
+@item @code{strerror.o}
+@item @code{strtoll.o}
+@item @code{snprintf.o}
+@item @code{vsnprintf.o}
+@item @code{vfprintf.o}
+@item @code{_IO_getc.o}
+@item @code{_IO_putc.o}
+@end itemize
+
+Use the @code{--extra-libs} option of @code{configure} to inform the
+build system of this library.
+
+@item FPU exceptions enabled by default
+
+Unlike most other systems, Plan 9 enables FPU exceptions by default.
+These must be disabled before calling any FFmpeg functions.  While the
+included tools will do this automatically, other users of the
+libraries must do it themselves.
+
+@end itemize
+
 @bye