= Building Linux, *nix, *BSD, and MacOS X Targets with GNU Build Systems = [[TracNav(Getting-Started/TOC)]] [[PageOutline(2-3,,inline)]] == Supported Targets == The autoconf based GNU build system can be used to build the libraries/applications for the following targets: * Linux/uC-Linux (i386, Opteron, Itanium, MIPS, PowerPC, etc.), * MacOS X (PowerPC), * mingw (i386), * FreeBSD and maybe other BSD's (i386, Opteron, etc.), * RTEMS with cross compilation (ARM, powerpc), * etc. == Requirements == === Tools and development libraries === In order to use PJSIP's GNU build system, these typical GNU tools are needed: * GNU make (other make will not work), * GNU binutils for the target, and * GNU gcc for the target. In addition, the following libraries are optional, but they will be used if they are present: * (For Linux): ALSA header files/libraries (optional) if ALSA support is wanted. To install, use the command: ```apt-get install libasound2-dev``` or ```apt-get install alsa-lib-devel``` (depending on the distribution). * OpenSSL header files/libraries (optional) if TLS support is wanted. === Video Support (for 2.0 and above) === The following components are needed for video: 1. [http://www.libsdl.org/ SDL] '''version 2.0''' 1. For format conversion and video manipulation, you can use one of the following: * libyuv (Recommended) for format conversion and video manipulation. Follow the instructions in ticket #1937 (or ticket #1776 if you are using PJSIP 2.5.1 or older). * [http://ffmpeg.org/ ffmpeg] development library. For build instructions, see below. 1. For video codecs: * H263.[[br]] [http://ffmpeg.org/ ffmpeg] development library. For H263P/H263-1998. * H264. You can use one of the following: - OpenH264 (Recommended): Follow the instructions in ticket #1947 (or ticket #1758 if you use PJSIP before version 2.6). Alternatively, you can use !VideoToolbox (only for Mac) or ffmpeg as explained below. - For Mac only: !VideoToolbox (supported since PJSIP version 2.7).Ddefine this in your config_site.h: {{{#define PJMEDIA_HAS_VID_TOOLBOX_CODEC 1}}} - [http://ffmpeg.org/ ffmpeg] development library, using libx264. We tested with ffmpeg version 1.x (1.2.5) to 0.x (from 0.5.1 (from circa 2009) to 0.10). Since #1897 we have added support for ffmpeg 2.8, however note that on applying the ticket, older ffmpeg will no longer be supported.[[br]] To enable H.264 support in ffmpeg (this is not required if you already have H.264 codec (via OpenH264 or !VideoToolbox)): - You need newer releases (October 2011 onwards), and it needs libz too. On Mac OS X: You may need to rebuild libbz2 if you have an old libbz2 for older system. - Build with at least: {{{ $ ./configure --enable-shared --disable-static --enable-memalign-hack # add other options if needed, e.g: optimization, install dir, search path # particularly CFLAGS and LDFLAGS for x264 # to enable H264, add "--enable-gpl --enable-libx264" $ make && make install }}} - [http://www.videolan.org/developers/x264.html libx264]. We tested with the latest from git (as of October 2011): {{{ $ ./configure --enable-static # add options if needed, e.g: optimization, install dir, search path $ make && make install-lib-static # default install dir is /usr/local }}} * VP8 and VP9.[[br]] [https://www.webmproject.org/code/ libvpx]. Download, build, and make install. 1. Linux: Video4Linux2 (v4l2) development library. 1. Optional: [http://qt.nokia.com/downloads/ Qt development SDK] for building the [#vidgui video GUI sample]. We tested with version 4.6 or later. - without this you can still enjoy video with pjsua console application === Host requirements === The build system is known to work on the following hosts: * Linux, many types of distributions. * MacOS X 10.2 * mingw (Win2K, XP) * FreeBSD (must use gmake instead of make) Building Win32 applications with Cygwin is currently not supported by the autoconf script (there are some conflicts with Windows headers), but one can still use the old configure script by calling ./configure-legacy. More over, cross-compilations might also work with Cygwin using this build system. == Running configure == === Using Default Settings === Run "./configure" without any options to let the script detect the appropriate settings for the host: {{{ $ cd pjproject $ ./configure ... }}} Notes: The default settings build the libraries in "release" mode, with default CFLAGS set to "-O2". To change the default CFLAGS, we can use the usual "./configure CFLAGS='-g'" construct. ==== Configure with Video Support ==== Add this to your {{{config_site.h}}}: {{{ #define PJMEDIA_HAS_VIDEO 1 }}} Video requirements will be detected by the {{{configure}}} script. Pay attention to the following output (the sample below was taken on a Mac): {{{ ... Using SDL prefix... /Users/pjsip/Desktop/opt checking SDL availability..... 2.0.1 Using ffmpeg prefix... /Users/pjsip/Desktop/opt checking for pkg-config... no checking for python... python pkgconfig.py checking ffmpeg packages... libavformat libavcodec libswscale libavutil checking for v4l2_open in -lv4l2... no checking OpenH264 availability... ok checking for I420Scale in -lyuv... yes ... }}} The above output shows the SDL version detected, 2.0.1 in this case. It also found OpenH264, libyuv, and ffmpeg packages (libavformat, libavcodec, etc). Note that for this particular build, alternative locations (prefixes) are specified for both SDL and ffmpeg with '''{{{--with-sdl}}}''' and '''{{{-with-ffmpeg}}}''' options respectively. '''Update''': since 2.5.5, libyuv is bundled in PJSIP package and will be built and enabled automatically, see ticket #1937 for more info. '''Note on ffmpeg libraries dependencies:''' The ''pkg-config'' tool is used to detect the correct compilation settings and library dependency for the ffmpeg packages. The ''pkg-config'' is not installed by default on Mac, as the output above shows, hence we use the alternate ''pkgconfig.py'' script. You need to have Python installed to run this script of course, and the configure script detects its availability automatically. If Python is not available, you will need to supply the correct CFLAGS and LDFLAGS manually prior to running ''{{{configure}}}'' so that it is able to detect ffmpeg libraries. For example, if ffmpeg was built with x264 and mp3 encoder support, you will need to pass additional "{{{-lx264 -lmp3lame}}}" flags when linking libavformat. With manual checking in the configure script, the {{{AC_CHECK_LIB(avformat)}}} would not be able to detect that it needs to add "{{{-lx264 -lmp3lame}}}" as the dependency, hence you need to put this in the LDFLAGS prior to running configure. === Features Customization === With the new autoconf based build system, most configuration/customization can be specified as configure arguments. The list of customizable features can be viewed by running "./configure --help" command: {{{ $ cd pjproject $ ./configure --help ... }}} Optional Features: {{{ --disable-floating-point Disable floating point where possible --disable-sound Exclude sound (i.e. use null sound) --disable-small-filter Exclude small filter in resampling --disable-large-filter Exclude large filter in resampling --disable-g711-plc Exclude G.711 Annex A PLC --disable-speex-aec Exclude Speex Acoustic Echo Canceller/AEC --disable-g711-codec Exclude G.711 codecs from the build --disable-l16-codec Exclude Linear/L16 codec family from the build --disable-gsm-codec Exclude GSM codec in the build --disable-speex-codec Exclude Speex codecs in the build --disable-ilbc-codec Exclude iLBC codec in the build --disable-ssl Force excluding TLS support (default is autodetected based on OpenSSL availability) --disable-sdl Disable SDL (default: not disabled) --disable-ffmpeg Disable ffmpeg (default: not disabled) --disable-v4l2 Disable Video4Linux2 (default: not disabled) --disable-openh264 Disable OpenH264 (default: not disabled) --disable-libyuv Exclude libyuv in the build ... }}} === Configuring Debug Version and Other Customizations === The configure script accepts standard customization, which details can be obtained by executing ./configure --help. Below is an example of specifying CFLAGS in configure: {{{ $ ./configure CFLAGS="-O3 -DNDEBUG -msoft-float -fno-builtin" ... }}} === Configuring TLS Support === By default, TLS support is configured based on the availability of OpenSSL header files and libraries. If OpenSSL is available at the default include and library path locations, TLS will be enabled by the configure script. You can explicitly disable TLS support by giving the configure script --disable-ssl option. For MacOS or iOS platforms, native SSL backend using Network framework is also supported, please check [https://github.com/pjsip/pjproject/pull/2482 GitHub PR #2482] for more info. == Cross Compilation == Cross compilation should be supported, using the usual autoconf syntax: {{{ $ ./configure --host=arm-elf-linux ... }}} Since cross-compilation is not tested as often as the "normal" build, please watch for the ./configure output for incorrect settings (well ideally this should be done for normal build too). Please refer to Porting Guide for further information about porting PJ software. == Running make == Once the configure script completes successfully, start the build process by invoking these commands: {{{ $ cd pjproject $ make dep $ make }}} Note: gmake may need to be specified instead of make for some hosts, to invoke GNU make instead of the native make. Description of all make targets supported by the Makefile's: ||all||The default (or first) target to build the libraries/binaries.|| ||dep, depend||Build dependencies rule from the source files.|| ||clean||Clean the object files for current target, but keep the output library/binary files intact.|| ||distclean, realclean||Remove all generated files (object, libraries, binaries, and dependency files) for current target.|| Note: make can be invoked either in the top-level PJ directory or in build directory under each project to build only the particular project. == Build Customizations == Build features can be customized by specifying the options when running ./configure as described in Running Configure above. In addition, additional CFLAGS and LDFLAGS options can be put in user.mak file in PJ root directory (this file may need to be created if it doesn't exist). Below is a sample of user.mak file contents: {{{ export CFLAGS += -msoft-float -fno-builtin export LDFLAGS += }}} == Optional: Installing PJSIP == Run '''{{{make install}}}''' to install the header and library files to the target directory. The default target directory can be customized by specifying '''{{{--prefix=DIR}}}''' option to '''{{{configure}}}''' script. {{{ $ make install }}} == Next: Using pjsip libraries in your applications == Follow the steps described in [wiki:Getting_Started_Using building applications with GNU tools] You can also go to '''[wiki:Video_Users_Guide Video User's Guide]''' for video usage instructions for pjsip version 2.x.