103 строки
3.3 KiB
Plaintext
103 строки
3.3 KiB
Plaintext
vpx Multi-Format Codec SDK
|
|
README - 19 May 2010
|
|
|
|
Welcome to the WebM VP8 Codec SDK!
|
|
|
|
COMPILING THE APPLICATIONS/LIBRARIES:
|
|
The build system used is similar to autotools. Building generally consists of
|
|
"configuring" with your desired build options, then using GNU make to build
|
|
the application.
|
|
|
|
1. Prerequisites
|
|
|
|
* All x86 targets require the Yasm[1] assembler be installed.
|
|
* All Windows builds require that Cygwin[2] be installed.
|
|
* Building the documentation requires PHP[3] and Doxygen[4]. If you do not
|
|
have these packages, you must pass --disable-install-docs to the
|
|
configure script.
|
|
|
|
[1]: http://www.tortall.net/projects/yasm
|
|
[2]: http://www.cygwin.com
|
|
[3]: http://php.net
|
|
[4]: http://www.doxygen.org
|
|
|
|
2. Out-of-tree builds
|
|
Out of tree builds are a supported method of building the application. For
|
|
an out of tree build, the source tree is kept separate from the object
|
|
files produced during compilation. For instance:
|
|
|
|
$ mkdir build
|
|
$ cd build
|
|
$ ../libvpx/configure <options>
|
|
$ make
|
|
|
|
3. Configuration options
|
|
The 'configure' script supports a number of options. The --help option can be
|
|
used to get a list of supported options:
|
|
$ ../libvpx/configure --help
|
|
|
|
4. Cross development
|
|
For cross development, the most notable option is the --target option. The
|
|
most up-to-date list of supported targets can be found at the bottom of the
|
|
--help output of the configure script. As of this writing, the list of
|
|
available targets is:
|
|
|
|
armv5te-linux-rvct
|
|
armv5te-linux-gcc
|
|
armv5te-symbian-gcc
|
|
armv6-darwin-gcc
|
|
armv6-linux-rvct
|
|
armv6-linux-gcc
|
|
armv6-symbian-gcc
|
|
iwmmxt-linux-rvct
|
|
iwmmxt-linux-gcc
|
|
iwmmxt2-linux-rvct
|
|
iwmmxt2-linux-gcc
|
|
armv7-linux-rvct
|
|
armv7-linux-gcc
|
|
mips32-linux-gcc
|
|
ppc32-darwin8-gcc
|
|
ppc32-darwin9-gcc
|
|
ppc64-darwin8-gcc
|
|
ppc64-darwin9-gcc
|
|
ppc64-linux-gcc
|
|
x86-darwin8-gcc
|
|
x86-darwin8-icc
|
|
x86-darwin9-gcc
|
|
x86-darwin9-icc
|
|
x86-linux-gcc
|
|
x86-linux-icc
|
|
x86-solaris-gcc
|
|
x86-win32-vs7
|
|
x86-win32-vs8
|
|
x86_64-darwin9-gcc
|
|
x86_64-linux-gcc
|
|
x86_64-solaris-gcc
|
|
x86_64-win64-vs8
|
|
universal-darwin8-gcc
|
|
universal-darwin9-gcc
|
|
generic-gnu
|
|
|
|
The generic-gnu target, in conjunction with the CROSS environment variable,
|
|
can be used to cross compile architectures that aren't explicitly listed, if
|
|
the toolchain is a cross GNU (gcc/binutils) toolchain. Other POSIX toolchains
|
|
will likely work as well. For instance, to build using the mipsel-linux-uclibc
|
|
toolchain, the following command could be used (note, POSIX SH syntax, adapt
|
|
to your shell as necessary):
|
|
|
|
$ CROSS=mipsel-linux-uclibc- ../libvpx/configure
|
|
|
|
In addition, the executables to be invoked can be overridden by specifying the
|
|
environment variables: CC, AR, LD, AS, STRIP, NM. Additional flags can be
|
|
passed to these executables with CFLAGS, LDFLAGS, and ASFLAGS.
|
|
|
|
5. Configuration errors
|
|
If the configuration step fails, the first step is to look in the error log.
|
|
This defaults to config.err. This should give a good indication of what went
|
|
wrong. If not, contact us for support.
|
|
|
|
SUPPORT
|
|
This library is an open source project supported by its community. Please
|
|
please email webm-users@webmproject.org for help.
|
|
|