cmake HAVE_SYS_CALL_H examples

ShadowsocksR-Live/shadowsocksr-native cmake/configure.cmake :82 

check_include_files ( "sys/syscall.h" HAVE_SYS_CALL_H )

plumonito/dtslam 3rdparty/glog_cmake/CMakeLists.txt :79 

CHECK_INCLUDE_FILES (sys/call.h HAVE_SYS_CALL_H)