1 vpx Multi-Format Codec SDK
4 Welcome to the WebM VP8/VP9 Codec SDK!
6 COMPILING THE APPLICATIONS/LIBRARIES:
7 The build system used is similar to autotools. Building generally consists of
8 "configuring" with your desired build options, then using GNU make to build
13 * All x86 targets require the Yasm[1] assembler be installed.
14 * All Windows builds require that Cygwin[2] be installed.
15 * Building the documentation requires PHP[3] and Doxygen[4]. If you do not
16 have these packages, you must pass --disable-install-docs to the
18 * Downloading the data for the unit tests requires curl[5] and sha1sum.
19 sha1sum is provided via the GNU coreutils, installed by default on
20 many *nix platforms, as well as MinGW and Cygwin. If coreutils is not
21 available, a compatible version of sha1sum can be built from
22 source[6]. These requirements are optional if not running the unit
25 [1]: http://www.tortall.net/projects/yasm
26 [2]: http://www.cygwin.com
28 [4]: http://www.doxygen.org
29 [5]: http://curl.haxx.se
30 [6]: http://www.microbrew.org/tools/md5sha1sum/
33 Out of tree builds are a supported method of building the application. For
34 an out of tree build, the source tree is kept separate from the object
35 files produced during compilation. For instance:
39 $ ../libvpx/configure <options>
42 3. Configuration options
43 The 'configure' script supports a number of options. The --help option can be
44 used to get a list of supported options:
45 $ ../libvpx/configure --help
48 For cross development, the most notable option is the --target option. The
49 most up-to-date list of supported targets can be found at the bottom of the
50 --help output of the configure script. As of this writing, the list of
107 universal-darwin8-gcc
108 universal-darwin9-gcc
109 universal-darwin10-gcc
110 universal-darwin11-gcc
111 universal-darwin12-gcc
112 universal-darwin13-gcc
115 The generic-gnu target, in conjunction with the CROSS environment variable,
116 can be used to cross compile architectures that aren't explicitly listed, if
117 the toolchain is a cross GNU (gcc/binutils) toolchain. Other POSIX toolchains
118 will likely work as well. For instance, to build using the mipsel-linux-uclibc
119 toolchain, the following command could be used (note, POSIX SH syntax, adapt
120 to your shell as necessary):
122 $ CROSS=mipsel-linux-uclibc- ../libvpx/configure
124 In addition, the executables to be invoked can be overridden by specifying the
125 environment variables: CC, AR, LD, AS, STRIP, NM. Additional flags can be
126 passed to these executables with CFLAGS, LDFLAGS, and ASFLAGS.
128 5. Configuration errors
129 If the configuration step fails, the first step is to look in the error log.
130 This defaults to config.log. This should give a good indication of what went
131 wrong. If not, contact us for support.
134 This library is an open source project supported by its community. Please
135 please email webm-discuss@webmproject.org for help.