cmake HAVE_CRC32 examples

alibaba/AliSQL cmake/zlib.cmake :58 

CHECK_FUNCTION_EXISTS(crc32 HAVE_CRC32)

arkdb/arkproxy cmake/zlib.cmake :57 

CHECK_FUNCTION_EXISTS(crc32 HAVE_CRC32)

mgba-emu/mgba CMakeLists.txt :607 

check_function_exists(crc32 HAVE_CRC32)

mgba-emu/mgba CMakeLists.txt :611 

list(APPEND FUNCTION_DEFINES HAVE_CRC32)

alibaba/AliSQLBackup cmake/zlib.cmake :58 

CHECK_FUNCTION_EXISTS(crc32 HAVE_CRC32)