cmake PA_HAS_JACK examples

audacity/audacity au3/lib-src/portmixer/CMakeLists.txt :11 

check_include_file( "pa_jack.h" PA_HAS_JACK )

audacity/audacity src/au3wrap/thirdparty/portmixer/CMakeLists.txt :11 

check_include_file( "pa_jack.h" PA_HAS_JACK )