examplie: test application for rocksdb compile

g++ -g -Wall -Werror -I. -I./include -std=c++11  -DROCKSDB_PLATFORM_POSIX  -DOS_LINUX -fno-builtin-memcmp -DROCKSDB_ATOMIC_PRESENT -DROCKSDB_FALLOCATE_PRESENT -DSNAPPY -DGFLAGS=google -DZLIB -DBZIP2   -DHAVE_JEMALLOC -O2 -fno-omit-frame-pointer -momit-leaf-frame-pointer -Woverloaded-virtual -c db/db_bench.cc -o db/db_bench.o 

g++ db/db_bench.o db/builder.o db/c.o db/column_family.o db/compaction.o db/compaction_picker.o db/db_filesnapshot.o db/dbformat.o db/db_impl.o db/db_impl_debug.o db/db_impl_readonly.o db/db_iter.o db/db_stats_logger.o db/file_indexer.o db/filename.o db/internal_stats.o db/log_reader.o db/log_writer.o db/memtable.o db/memtable_list.o db/merge_helper.o db/merge_operator.o db/repair.o db/table_cache.o db/table_properties_collector.o db/tailing_iter.o db/transaction_log_impl.o db/version_edit.o db/version_set.o db/write_batch.o table/block_based_table_builder.o table/block_based_table_factory.o table/block_based_table_reader.o table/block_builder.o table/block.o table/block_hash_index.o table/filter_block.o table/flush_block_policy.o table/format.o table/iterator.o table/merger.o table/meta_blocks.o table/plain_table_builder.o table/plain_table_factory.o table/plain_table_reader.o table/table_properties.o table/two_level_iterator.o util/arena.o util/auto_roll_logger.o util/blob_store.o util/bloom.o util/build_version.o util/cache.o util/coding.o util/comparator.o util/crc32c.o util/dynamic_bloom.o util/env.o util/env_hdfs.o util/env_posix.o util/filter_policy.o util/hash.o util/hash_cuckoo_rep.o util/hash_linklist_rep.o util/hash_skiplist_rep.o util/histogram.o utilities/backupable/backupable_db.o utilities/geodb/geodb_impl.o utilities/merge_operators/put.o utilities/merge_operators/string_append/stringappend2.o utilities/merge_operators/string_append/stringappend.o utilities/merge_operators/uint64add.o utilities/redis/redis_lists.o utilities/ttl/db_ttl_impl.o util/ldb_cmd.o util/ldb_tool.o util/log_buffer.o util/logging.o util/murmurhash.o util/options.o util/perf_context.o util/skiplistrep.o util/slice.o util/statistics.o util/status.o util/string_util.o util/sync_point.o util/thread_local.o util/vectorrep.o util/xxhash.o port/port_posix.o port/stack_trace.o  ./util/testutil.o   -o db_bench  -lpthread -lrt -lsnappy -lgflags -lz -lbz2