here is script to compile current callweaver on CentOS 5.x / RHEL 5.x

----- CALLWEAVER RPMS INFO------

if you don`t want to compile it you can use fedora epel, it`s already have callweaver precompiled in repository and you will save some time.

su -c 'rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm'
su -c 'yum -y install callweaver --enablerepo=epel-testing'

-----END OF CALLWEAVER RPMS INFO------

if you want to use callweaver from sources continue here -->

#set to host cpu +1 - here is for dual-core
export make_cpu=3
#prerequest. remove mysql&perl if not needed.
yum install httpd perl gcc bison flex speex-devel \
    lame libogg-devel libtiff-devel  make autoconfig \
    automake sqlite-devel readline-devel pkgconfig \
    libtool ncurses-devel mysql-devel mysql-server \
    libcap-devel
mkdir /usr/src/callweaver_stuff
cd /usr/src/callweaver_stuff
#spandsp
wget "http://www.soft-switch.org/downloads/spandsp/spandsp-0.0.6pre2.tgz" 
tar -xzf spandsp-*.tgz
cd spandsp-*
./configure --prefix=/usr/
make -j $make_cpu
make install
cd ..

#libvale
wget "http://www.soft-switch.org/downloads/vale/vale-0.0.2.tgz" 
tar -xzf vale-*.tgz
cd vale-0.0.?
./configure --prefix=/usr/
make -j $make_cpu
make install
echo "/usr/lib " >>/etc/ld.so.conf
ldconfig
#callweaver
cd ..
wget "http://devs.callweaver.org/trunk_snapshots/callweaver-latest.tar.gz" 
#or http://devs.callweaver.org/1.2_snapshots/callweaver-RC-latest.tar.gz
#or 
tar -xzf callweaver-*.tar.gz
cd callweaver-*
groupadd callweaver
useradd callweaver -g callweaver
#remove here mysql if not needed. do ./configure --help and add all u needed
./configure --prefix=/  --with-res_config_mysql  --with-app_sql_mysql \
         --with-cdr_mysql --enable-mysql

make  -j $make_cpu
make install

to auto load on startup

cp ./contrib/init.d/rc.redhat.callweaver /etc/init.d/callweaver
chmod a+x /etc/init.d/callweaver
chkconfig --add callweaver

find and change in /etc/init.d/callweaver patch-liek syntax – find line with – and replace with +

-[ -x /usr/sbin/callweaver ] || exit 0
+[ -x /sbin/callweaver ] || exit 0
-export LD_ASSUME_KERNEL=2.4.1
+#export LD_ASSUME_KERNEL=2.4.1
-DAEMON=/usr/sbin/callweaver
+DAEMON=/sbin/callweaver
-SAFE_CALLWEAVER=/usr/sbin/safe_callweaver
+SAFE_CALLWEAVER=/sbin/safe_callweaver
-#AST_USER="callweaver" 
-#AST_GROUP="callweaver" 
+AST_USER="callweaver" 
+AST_GROUP="callweaver"