cmake SYSLOG_NG_HAVE_DECL_ examples

syslog-ng/syslog-ng cmake/openssl_functions.cmake :55 

check_symbol_exists(${symbol} "${check_symbol_headers}" SYSLOG_NG_HAVE_DECL_${SYMBOL_UPPERCASE})

syslog-ng/syslog-ng modules/http/CMakeLists.txt :59 

check_type_size(${NAME} SYSLOG_NG_HAVE_DECL_${NAME_CAPITAL})