cmake HAVE_SYSCTL examples

bbidulock/icewm src/CMakeLists.txt :167 

CHECK_FUNCTION_EXISTS(sysctl HAVE_SYSCTL)

etternagame/etterna extern/fftw-3.3.8/CMakeLists.txt :86 

check_symbol_exists (sysctl unistd.h HAVE_SYSCTL)

gccxml/gccxml GCC/config_cmake/CMakeLists.txt :283 

CHECK_FUNCTION_EXISTS(sysctl HAVE_SYSCTL)

H-uru/Plasma cmake/CompilerChecks.cmake :27 

try_compile(HAVE_SYSCTL ${PROJECT_BINARY_DIR}
            ${PROJECT_SOURCE_DIR}/cmake/check_sysctl.cpp)

Bitcoin-ABC/bitcoin-abc src/config/CMakeLists.txt :152 

check_symbol_exists(sysctl "sys/types.h;sys/sysctl.h" HAVE_SYSCTL)