cmake HAVE_STRCMP examples

SmartThingsCommunity/st-device-sdk-c test/framework/cmocka/ConfigureChecks.cmake :87 

check_function_exists(strcmp HAVE_STRCMP)

clibs/cmocka ConfigureChecks.cmake :90 

check_function_exists(strcmp HAVE_STRCMP)

llvm-dcpu16/llvm-dcpu16 cmake/config-ix.cmake :134 

check_symbol_exists(strcmp string.h HAVE_STRCMP)