137 строки
4.3 KiB
Plaintext
137 строки
4.3 KiB
Plaintext
vpx Multi-Format Codec SDK
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README - 1 August 2013
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Welcome to the WebM VP8/VP9 Codec SDK!
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COMPILING THE APPLICATIONS/LIBRARIES:
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The build system used is similar to autotools. Building generally consists of
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"configuring" with your desired build options, then using GNU make to build
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the application.
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1. Prerequisites
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* All x86 targets require the Yasm[1] assembler be installed.
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* All Windows builds require that Cygwin[2] be installed.
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* Building the documentation requires PHP[3] and Doxygen[4]. If you do not
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have these packages, you must pass --disable-install-docs to the
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configure script.
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* Downloading the data for the unit tests requires curl[5] and sha1sum.
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sha1sum is provided via the GNU coreutils, installed by default on
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many *nix platforms, as well as MinGW and Cygwin. If coreutils is not
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available, a compatible version of sha1sum can be built from
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source[6]. These requirements are optional if not running the unit
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tests.
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[1]: http://www.tortall.net/projects/yasm
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[2]: http://www.cygwin.com
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[3]: http://php.net
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[4]: http://www.doxygen.org
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[5]: http://curl.haxx.se
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[6]: http://www.microbrew.org/tools/md5sha1sum/
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2. Out-of-tree builds
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Out of tree builds are a supported method of building the application. For
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an out of tree build, the source tree is kept separate from the object
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files produced during compilation. For instance:
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$ mkdir build
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$ cd build
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$ ../libvpx/configure <options>
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$ make
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3. Configuration options
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The 'configure' script supports a number of options. The --help option can be
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used to get a list of supported options:
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$ ../libvpx/configure --help
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4. Cross development
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For cross development, the most notable option is the --target option. The
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most up-to-date list of supported targets can be found at the bottom of the
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--help output of the configure script. As of this writing, the list of
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available targets is:
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armv5te-android-gcc
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armv5te-linux-rvct
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armv5te-linux-gcc
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armv5te-none-rvct
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armv6-darwin-gcc
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armv6-linux-rvct
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armv6-linux-gcc
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armv6-none-rvct
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armv7-android-gcc
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armv7-darwin-gcc
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armv7-linux-rvct
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armv7-linux-gcc
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armv7-none-rvct
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armv7-win32-vs11
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mips32-linux-gcc
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ppc32-darwin8-gcc
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ppc32-darwin9-gcc
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ppc32-linux-gcc
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ppc64-darwin8-gcc
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ppc64-darwin9-gcc
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ppc64-linux-gcc
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sparc-solaris-gcc
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x86-android-gcc
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x86-darwin8-gcc
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x86-darwin8-icc
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x86-darwin9-gcc
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x86-darwin9-icc
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x86-darwin10-gcc
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x86-darwin11-gcc
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x86-darwin12-gcc
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x86-darwin13-gcc
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x86-linux-gcc
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x86-linux-icc
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x86-os2-gcc
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x86-solaris-gcc
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x86-win32-gcc
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x86-win32-vs7
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x86-win32-vs8
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x86-win32-vs9
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x86-win32-vs10
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x86-win32-vs11
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x86_64-darwin9-gcc
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x86_64-darwin10-gcc
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x86_64-darwin11-gcc
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x86_64-darwin12-gcc
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x86_64-darwin13-gcc
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x86_64-linux-gcc
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x86_64-linux-icc
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x86_64-solaris-gcc
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x86_64-win64-gcc
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x86_64-win64-vs8
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x86_64-win64-vs9
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x86_64-win64-vs10
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x86_64-win64-vs11
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universal-darwin8-gcc
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universal-darwin9-gcc
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universal-darwin10-gcc
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universal-darwin11-gcc
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universal-darwin12-gcc
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universal-darwin13-gcc
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generic-gnu
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The generic-gnu target, in conjunction with the CROSS environment variable,
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can be used to cross compile architectures that aren't explicitly listed, if
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the toolchain is a cross GNU (gcc/binutils) toolchain. Other POSIX toolchains
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will likely work as well. For instance, to build using the mipsel-linux-uclibc
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toolchain, the following command could be used (note, POSIX SH syntax, adapt
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to your shell as necessary):
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$ CROSS=mipsel-linux-uclibc- ../libvpx/configure
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In addition, the executables to be invoked can be overridden by specifying the
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environment variables: CC, AR, LD, AS, STRIP, NM. Additional flags can be
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passed to these executables with CFLAGS, LDFLAGS, and ASFLAGS.
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5. Configuration errors
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If the configuration step fails, the first step is to look in the error log.
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This defaults to config.log. This should give a good indication of what went
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wrong. If not, contact us for support.
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SUPPORT
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This library is an open source project supported by its community. Please
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please email webm-discuss@webmproject.org for help.
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