added rocksdb

cmake/libraries/rocksdb.cmake

@@ -0,0 +1,36 @@
+if(PROJECT_ENABLE_ROCKSDB)
+  if(PROJECT_BUILD)
+    add_definitions(-DPROJECT_ENABLE_ROCKSDB)
+
+    find_library(ROCKSDB_LIBRARY NAMES librocksdb.a REQUIRED)
+
+    link_libraries(${ROCKSDB_LIBRARY})
+  elseif(NOT PROJECT_IS_MINGW OR CMAKE_HOST_WIN32)
+    ExternalProject_Add(rocksdb_project
+      PREFIX external
+      URL ${PROJECT_3RD_PARTY_DIR}/rocksdb-${ROCKSDB_VERSION}.tar.gz
+      URL_HASH SHA256=${ROCKSDB_HASH}
+      LIST_SEPARATOR |
+      CMAKE_ARGS ${PROJECT_EXTERNAL_CMAKE_FLAGS}
+        -DBUILD_SHARED_LIBS=${PROJECT_BUILD_SHARED_LIBS}
+        -DBUILD_STATIC_LIBS=ON
+        -DFAIL_ON_WARNINGS=OFF
+        -DPORTABLE=1
+        -DROCKSDB_BUILD_SHARED=${PROJECT_BUILD_SHARED_LIBS}
+        -DROCKSDB_INSTALL_ON_WINDOWS=ON
+        -DWITH_BENCHMARK=OFF
+        -DWITH_BENCHMARK_TOOLS=OFF
+        -DWITH_CORE_TOOLS=OFF
+        -DWITH_EXAMPLES=OFF
+        -DWITH_GFLAGS=OFF
+        -DWITH_IOSTATS_CONTEXT=OFF
+        -DWITH_PERF_CONTEXT=OFF
+        -DWITH_TESTS=OFF
+        -DWITH_TOOLS=OFF
+        -DWITH_TRACE_TOOLS=OFF
+        -DWITH_ZLIB=ON
+    )
+
+    list(APPEND PROJECT_DEPENDENCIES rocksdb_project)
+  endif()
+endif()