added instruction and requirements for windows

README.md

@@ -1,5 +1,5 @@
-rust-rocksdb
-============
+# rust-rocksdb
+
 ![RocksDB build](https://github.com/rust-rocksdb/rust-rocksdb/workflows/RocksDB%20build/badge.svg?branch=master)
 [![crates.io](https://img.shields.io/crates/v/rocksdb.svg)](https://crates.io/crates/rocksdb)
 [![documentation](https://docs.rs/rocksdb/badge.svg)](https://docs.rs/rocksdb)
@@ -7,7 +7,6 @@ rust-rocksdb
 [![Gitter chat](https://badges.gitter.im/rust-rocksdb/gitter.png)](https://gitter.im/rust-rocksdb/lobby)
 ![rust 1.60.0 required](https://img.shields.io/badge/rust-1.60.0-blue.svg?label=MSRV)
 
-
 ![GitHub commits (since latest release)](https://img.shields.io/github/commits-since/rust-rocksdb/rust-rocksdb/latest.svg)
 
 ## Requirements
@@ -20,27 +19,30 @@ rust-rocksdb
 pkg_add llvm
 ```
 
-## Contributing
+### On macos
 
-Feedback and pull requests welcome!  If a particular feature of RocksDB is 
-important to you, please let me know by opening an issue, and I'll 
-prioritize it.
+```
+port install clang
+```
 
-## Usage
+### On windows
 
-This binding is statically linked with a specific version of RocksDB. If you 
-want to build it yourself, make sure you've also cloned the RocksDB and 
-compression submodules:
+download from [here](https://github.com/llvm/llvm-project/releases/download/llvmorg-16.0.0/LLVM-16.0.0-win64.exe)
 
-    git submodule update --init --recursive
+## Contributing
+
+Feedback and pull requests welcome! If a particular feature of RocksDB is
+important to you, please let me know by opening an issue, and I'll
+prioritize it.
 
 ## Compression Support
-By default, support for the [Snappy](https://github.com/google/snappy), 
-[LZ4](https://github.com/lz4/lz4), [Zstd](https://github.com/facebook/zstd), 
-[Zlib](https://zlib.net), and [Bzip2](http://www.bzip.org) compression 
-is enabled through crate features.  If support for all of these compression 
-algorithms is not needed, default features can be disabled and specific 
-compression algorithms can be enabled. For example, to enable only LZ4 
+
+By default, support for the [Snappy](https://github.com/google/snappy),
+[LZ4](https://github.com/lz4/lz4), [Zstd](https://github.com/facebook/zstd),
+[Zlib](https://zlib.net), and [Bzip2](http://www.bzip.org) compression
+is enabled through crate features. If support for all of these compression
+algorithms is not needed, default features can be disabled and specific
+compression algorithms can be enabled. For example, to enable only LZ4
 compression support, make these changes to your Cargo.toml:
 
 ```

librocksdb-sys/build.rs

@@ -421,6 +421,8 @@ fn main() {
     let target = env::var("TARGET").unwrap();
     if target.contains("openbsd") {
         env::set_var("LIBCLANG_PATH", "/usr/local/lib");
+    } else if target.contains("windows") {
+        env::set_var("LIBCLANG_PATH", "C:\\Program Files\\LLVM\\bin");
     }
 
     bindgen_rocksdb();