Makefile:937: *** You must install signalwire-client-c to build mod_signalwire。停止。

git clone https://github.com/signalwire/signalwire-c.git

cmake .
make
sudo make install

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig:${PKG_CONFIG_PATH}