安裝環境：
CentOS7
FreeSwitch1.8.5
cmake1.14.0
由於網絡的問題，而且訪問外網的速度一般都是比較慢的，所以我是先下載freeswitch1.8.5的安裝包和cmake1.14.0的安裝包,然後把這兩個安裝包放到/usr/local/src目錄下
本安裝過程主要是參考 https://blog.csdn.net/zhuimeng11_/article/details/92819658
安裝過程：
1、下載需要安裝的工具包
我是先使用迅雷把freeswitch1.8.5和cmake1.14.0
2、安裝依賴包
yum install -y http://files.freeswitch.org/freeswitch-release-1-6.noarch.rpm epel-release
yum install -y git alsa-lib-devel autoconf automake bison broadvoice-devel bzip2 curl-devel libdb4-devel e2fsprogs-devel erlang flite-devel g722_1-devel gcc-c++ gdbm-devel gnutls-devel ilbc2-devel ldns-devel libcodec2-devel libcurl-devel libedit-devel libidn-devel libjpeg-devel libmemcached-devel libogg-devel libsilk-devel libsndfile-devel libtheora-devel libtiff-devel libtool libuuid-devel libvorbis-devel libxml2-devel lua-devel lzo-devel mongo-c-driver-devel ncurses-devel net-snmp-devel openssl-devel opus-devel pcre-devel perl perl-ExtUtils-Embed pkgconfig portaudio-devel postgresql-devel python-devel python-devel soundtouch-devel speex-devel sqlite-devel unbound-devel unixODBC-devel wget which yasm zlib-devel libshout-devel libmpg123-devel lame-devel
3、 安裝cmake
先把cmake放到 /usr/local/src目錄下，如果cmake安裝包不在/usr/local/src目下，可以使用mv指令把文件移到/usr/local/src
或者使用wget https://cmake.org/files/v3.14/cmake-3.14.0.tar.gz進行下載
yum remove cmake #卸載yum安裝的版本，若無安裝則忽略
cd /usr/local/src
tar vzxf cmake-3.14.0.tar.gz
cd cmake-3.14.0./bootstrap
./configure
make
make install
4、 安裝libks
cd /usr/local/src
yum install libatomic
git clone https://github.com/signalwire/libks.git
cd libks
cmake .
make
make install
5、安裝 signalwire-c
cd /usr/local/src
git clone https://github.com/signalwire/signalwire-c.git
cd signalwire-c/
cmake .
make
make install
ln -sf /usr/local/lib64/pkgconfig/signalwire_client.pc /usr/lib64/pkgconfig/signalwire_client.pc
6、安裝freeswitch如果freeswitch安裝包不在/usr/local/src目下，可以使用mv指令把文件移到/usr/local/src
或者使用wget http://files.freeswitch.org/releases/freeswitch/freeswitch-1.8.5.tar.gz進行下載
cd /usr/local/src/
tar vzxf freeswitch-1.8.5.tar.gz
cd freeswitch-1.8.5
./configure
make
make install
使用 ./configure最後的生成結果
使用make最後的結果
如果能看到上圖的運行狀態，說明安裝已經成功了，當然不要忘了還有一個make install指令
6、使用ln生成軟連接
ln -sf /usr/local/freeswitch/bin/freeswitch /usr/bin/
ln -sf /usr/local/freeswitch/bin/fs_cli /usr/bin/
7、測試安裝結果使用freeswitch
8、打開了freeswitch 可以使用shutdown指令關閉