编译Freeswitch Error: spandsp ＞= 3.0... configure: error: no usable spandsp； please install spandsp3

编译freeswitch1.10.5版本时，报错 3.0… configure: error: no usable spandsp； please install spandsp3

解决步骤：
1、安装spandsp

cd /usr/local/src/freeswitch-1.10.5.-release
git clone https://github.com/freeswitch/spandsp.git
cd spandsp
./configure
make
make install
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:${PKG_CONFIG_PATH}
ldconfig

2、安装sofia-sip

cd /usr/local/src/freeswitch-1.10.5.-release
git clone https://github.com/freeswitch/sofia-sip.git
c