cmake HAVE_SETCONTEXT examples

accel-ppp/accel-ppp accel-pppd/CMakeLists.txt :177 

CHECK_FUNCTION_EXISTS(setcontext HAVE_SETCONTEXT)

accel-ppp/accel-ppp accel-pppd/CMakeLists.txt :181 

ELSE (HAVE_GETCONTEXT AND HAVE_SETCONTEXT)

accel-ppp/accel-ppp accel-pppd/CMakeLists.txt :183 

ENDIF (HAVE_GETCONTEXT AND HAVE_SETCONTEXT)