Building Linux, *nix, *BSD, and MacOS X Targets with GNU Build Systems (moved)

Moved to:

  1. Supported Targets
  2. Requirements
    1. Tools and development libraries
    2. Video Support (for 2.0 and above)
    3. Host requirements
  3. Running configure
    1. Using Default Settings
    2. Features Customization
    3. Configuring Debug Version and Other Customizations
    4. Configuring TLS Support
  4. Cross Compilation
    1. General
    2. Building for MacOS x86_64 on MacOS M1
    3. Building for MacOS M1 on MacOS x86_64
  5. Running make
  6. Build Customizations
  7. Optional: Installing PJSIP
  8. Next: Using pjsip libraries in your applications

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/mingw-w64(i386),
  • FreeBSD and maybe other BSD's (i386, Opteron, etc.),
  • RTEMS with cross compilation (ARM, powerpc),
  • etc.


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. SDL version 2.0
  2. For format conversion and video manipulation, you can use one of the following:
    • libyuv (Recommended) for format conversion and video manipulation. If you are using PJSIP 2.5.5 or newer, libyuv should be built and enabled automatically.
    • ffmpeg development library. For build instructions, see below.
  3. For video codecs:
    • H263.
      ffmpeg development library. For H263P/H263-1998.
    • H264. You can use one of the following:
      • OpenH264 (Recommended): Follow the instructions in ticket #1947. 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
      • 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.
        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
        • 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.
      libvpx. Download, build, and make install.
  4. Linux: Video4Linux2 (v4l2) development library.
  5. Optional: Qt development SDK for building the 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/mingw-w64 (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.

Mingw-w64 is supported since 2.11, including video with DirectShow? camera, please check here for more info.

Running configure

Using Default Settings

Run "./configure" without any options to let the script detect the appropriate settings for the host:

$ cd pjproject
$ ./configure


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:


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
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.

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 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 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.

Building for MacOS x86_64 on MacOS M1

Run configure script:

$ CFLAGS="-arch x86_64" LDFLAGS="-arch x86_64" ./configure --host=x86_64-apple-darwin

Building for MacOS M1 on MacOS x86_64

Run configure script:

$ CFLAGS="-arch arm64" LDFLAGS="-arch arm64" ./configure --host=arm-apple-darwin

Running make

Once the configure script completes successfully, start the build process by invoking these commands:

$ cd pjproject
$ make dep
$ make


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:

allThe default (or first) target to build the libraries/binaries.
dep, dependBuild dependencies rule from the source files.
cleanClean the object files for current target, but keep the output library/binary files intact.
distclean, realcleanRemove all generated files (object, libraries, binaries, and dependency files) for current target.


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 building applications with GNU tools You can also go to Video User's Guide for video usage instructions for pjsip version 2.x.

Last modified 17 months ago Last modified on Jan 25, 2023 3:36:52 AM