Compression algorthms are now enabled by crate features...

Cargo.toml

@@ -14,8 +14,14 @@ exclude = [
 ]
 
 [features]
-default = []
+default = ["snappy", "lz4", "zstd", "zlib", "bzip2"]
 valgrind = []
+snappy = ["librocksdb-sys/snappy"]
+lz4 = ["librocksdb-sys/lz4"]
+zstd = ["librocksdb-sys/zstd"]
+zlib = ["librocksdb-sys/zlib"]
+bzip2 = ["librocksdb-sys/bzip2"]
+
 
 [dependencies]
 libc = "0.2"

README.md

@@ -6,6 +6,15 @@ rust-rocksdb
 
 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.
 
-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 Snappy submodules:
+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:
 
     git submodule update --init --recursive
+
+## 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 compression support, make these changes to your Cargo.toml:
+
+```
+[dependencies.rocksdb]
+default-features = false
+features = ["lz4"]
+```

librocksdb-sys/Cargo.toml

@@ -14,6 +14,12 @@ links = "rocksdb"
 [features]
 default = [ "static" ]
 static = []
+snappy = []
+lz4 = []
+zstd = []
+zlib = []
+bzip2 = []
+
 
 [dependencies]
 libc = "0.2"

librocksdb-sys/build.rs

@@ -49,20 +49,35 @@ fn build_rocksdb() {
     config.include("rocksdb/include/");
     config.include("rocksdb/");
     config.include("rocksdb/third-party/gtest-1.7.0/fused-src/");
-    config.include("snappy/");
-    config.include("lz4/lib/");
-    config.include("zstd/lib/");
-    config.include("zstd/lib/dictBuilder/");
-    config.include("zlib/");
-    config.include("bzip2/");
-    config.include(".");
+    
+    if cfg!(feature = "snappy") {
+        config.define("SNAPPY", Some("1"));
+        config.include("snappy/");
+    }
 
+    if cfg!(feature = "lz4") {
+        config.define("LZ4", Some("1"));
+        config.include("lz4/lib/");
+    }
+
+    if cfg!(feature = "zstd") {
+        config.define("ZSTD", Some("1"));
+        config.include("zstd/lib/");
+        config.include("zstd/lib/dictBuilder/");
+    }
+
+    if cfg!(feature = "zlib") {
+        config.define("ZLIB", Some("1"));
+        config.include("zlib/");
+    }
+    
+    if cfg!(feature = "bzip2") {
+        config.define("BZIP2", Some("1"));
+        config.include("bzip2/");
+    }
+
+    config.include(".");
     config.define("NDEBUG", Some("1"));
-    config.define("SNAPPY", Some("1"));
-    config.define("LZ4", Some("1"));
-    config.define("ZSTD", Some("1"));
-    config.define("ZLIB", Some("1"));
-    config.define("BZIP2", Some("1"));
 
     let mut lib_sources = include_str!("rocksdb_lib_sources.txt")
         .split(" ")
@@ -281,19 +296,19 @@ fn main() {
     if !try_to_find_and_link_lib("ROCKSDB") {
         build_rocksdb();
     }
-    if !try_to_find_and_link_lib("SNAPPY") {
+    if cfg!(feature = "snappy") && !try_to_find_and_link_lib("SNAPPY") {
         build_snappy();
     }
-    if !try_to_find_and_link_lib("LZ4") {
+    if cfg!(feature = "lz4") && !try_to_find_and_link_lib("LZ4") {
         build_lz4();
     }
-    if !try_to_find_and_link_lib("ZSTD") {
+    if cfg!(feature = "zstd") && !try_to_find_and_link_lib("ZSTD") {
         build_zstd();
     }
-    if !try_to_find_and_link_lib("ZLIB") {
+    if cfg!(feature = "zlib") && !try_to_find_and_link_lib("ZLIB") {
         build_zlib();
     }
-    if !try_to_find_and_link_lib("BZIP2") {
+    if cfg!(feature = "bzip2") && !try_to_find_and_link_lib("BZIP2") {
         build_bzip2();
     }
 }