= Building Application using PJSIP with GNU Tools =

This article is a continuation of the '''Getting Started''' article as described in http://www.pjsip.org/using.htm.

== Requirements ==

 * GNU tools (GNU make, binutils, gcc, and the likes).

== Steps for Building Your Application that Uses PJSIP/PJMEDIA ==

 1. First, build {{{pjproject}}} libraries as described in http://www.pjsip.org/using.htm. This normally is accomplished by executing these commands:
    {{{$ ./configure && make dep && make}}}
 1. Create a directory outside the PJSIP sources for your project and place your source files there.
 1. Create a file named '''Makefile''' in your source directory. If you have PJ '''version 0.5.10.2''' or later, you can use this template for your Makefile:
{{{
#Modify this to point to the PJSIP location.
PJBASE=/home/myself/pjproject

include $(PJBASE)/build.mak

CC      = $(APP_CC)
LDFLAGS = $(APP_LDFLAGS)
LDLIBS  = $(APP_LDLIBS)
CFLAGS  = $(APP_CFLAGS)
CPPFLAGS= ${APP_CXXFLAGS}

# If your application is in a file named myapp.cpp or myapp.c
# this is the line you will need to build the binary.
all: myapp

myapp: myapp.cpp
        $(CC) -o $@ $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) $<

clean:
        rm -f myapp.o myapp
}}}
 1. Otherwise if you have PJ '''version 0.5.10.1''' or older, you can use this template for your Makefile:
{{{
# Modify this to point to the PJSIP location.
PJBASE=/home/tarani/pjproject-0.5.10.1

include $(PJBASE)/build/mak

CC=$(CROSS_COMPILE)$(CC_NAME)

# Remove components that you don't need from the following definitions.
LDFLAGS=-L${PJBASE}/pjlib/lib\
    -L${PJBASE}/pjlib-util/lib\
    -L${PJBASE}/pjmedia/lib\
    -L${PJBASE}/pjsip/lib
LDLIBS=-lpjsua-${TARGET_NAME}\
    -lpjsip-ua-${TARGET_NAME}\
    -lpjsip-simple-${TARGET_NAME}\
    -lpjsip-${TARGET_NAME}\
    -lpjmedia-codec-${TARGET_NAME}\
    -lpjmedia-${TARGET_NAME}\
    -lpjmedia-codec-${TARGET_NAME}\
    -lpjlib-util-${TARGET_NAME}\
    -lpj-${TARGET_NAME}\
	-lm\
	-lpthread\
	-lasound\
	-lssl
CFLAGS=-I${PJBASE}/pjlib/include\
    -I${PJBASE}/pjlib-util/include\
    -I${PJBASE}/pjmedia/include\
    -I${PJBASE}/pjsip/include\
    -DPJ_AUTOCONF=1
CPPFLAGS=${CFLAGS}

# If your application is in a file named myapp.cpp or myapp.c
# this is the line you will need to build the binary.
all: myapp

myapp: myapp.cpp
        $(CC) -o $@ $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) $<

clean:
        rm -f myapp.o myapp
}}}
 1. There few things to note when making the '''Makefile''' above:
    1. First, make sure that you replace '''PJBASE''' with the location of PJSIP sources in your computer, and
    1. If you notice there are spaces towards the bottom of the file (before {{{$(CC)}}} and {{{rm}}}, these are a single tab, not spaces. '''This is important''', or otherwise '''make''' command will fail with "'''missing separator'''" error.
    1. Change {{{myapp.cpp}}} to your source filename.
 1. Create {{{myapp.cpp}}} in the same directory as your {{{Makefile}}}. At minimum, it may look like this:
{{{
#include <pjlib.h>
#include <pjlib-util.h>
#include <pjmedia.h>
#include <pjmedia-codec.h>
#include <pjsip.h>
#include <pjsip_simple.h>
#include <pjsip_ua.h>
#include <pjsua-lib/pjsua.h>

int main()
{
        return 0;
}
}}}
 1. Last, run '''make''' in your source directory.