vpx Multi-Format Codec SDKREADME - 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    armv5te-wince-vs8    armv6-darwin-gcc    armv6-linux-rvct    armv6-linux-gcc    armv6-symbian-gcc    armv6-wince-vs8    iwmmxt-linux-rvct    iwmmxt-linux-gcc    iwmmxt-wince-vs8    iwmmxt2-linux-rvct    iwmmxt2-linux-gcc    iwmmxt2-wince-vs8    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/src/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.