cmake SoapySDR examples

gnuradio/gnuradio gr-soapy/CMakeLists.txt :15 

find_package(SoapySDR 0.7.2)

cjcliffe/CubicSDR CMakeLists.txt :180 

find_package(SoapySDR "0.4.0" NO_MODULE REQUIRED)

rtl-airband/RTLSDR-Airband src/CMakeLists.txt :157 

find_package(SoapySDR NO_MODULE)