fix linux build

librocksdb-sys/api/c.cc

@@ -1,5 +1,5 @@
 #include "../rocksdb/include/rocksdb/version.h"
-
+#include <cstring>
 #include "c.h"
 
 static char* CopyString(const std::string& str) {

librocksdb-sys/build.rs

@@ -266,7 +266,7 @@ fn build_rocksdb() {
         // set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /FC /d2Zi+ /W4 /wd4127 /wd4800 /wd4996 /wd4351 /wd4100 /wd4204 /wd4324")
     } else {
         if target.contains("x86_64") {
-            config.flag("-Wstrict-prototypes");
+            config.flag_if_supported("-Wstrict-prototypes");
         }
         //-W -Wextra -Wall -pthread
         //-fno-omit-frame-pointer