Problem: rocksdb nix expression hard code the major version (#1198)

- handle the major version dynamically.

Signed-off-by: yihuang <[email protected]>

Author: yihuang

nix/rocksdb.nix

@@ -81,7 +81,7 @@ stdenv.mkDerivation rec {
     mkdir -p $tools/bin
     cp tools/{ldb,sst_dump}${stdenv.hostPlatform.extensions.executable} $tools/bin/
   '' + lib.optionalString stdenv.isDarwin ''
-    ls -1 $tools/bin/* | xargs -I{} ${stdenv.cc.bintools.targetPrefix}install_name_tool -change "@rpath/librocksdb.8.dylib" $out/lib/librocksdb.dylib {}
+    ls -1 $tools/bin/* | xargs -I{} ${stdenv.cc.bintools.targetPrefix}install_name_tool -change "@rpath/librocksdb.${lib.versions.major version}.dylib" $out/lib/librocksdb.dylib {}
   '' + lib.optionalString (stdenv.isLinux && enableShared) ''
     ls -1 $tools/bin/* | xargs -I{} patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib {}
   '';
@@ -94,7 +94,7 @@ stdenv.mkDerivation rec {
     fi
   '' + lib.optionalString stdenv.isDarwin ''
     ${stdenv.cc.targetPrefix}install_name_tool -change "@rpath/libsnappy.1.dylib" "${snappy}/lib/libsnappy.1.dylib" $out/lib/librocksdb.dylib
-    ${stdenv.cc.targetPrefix}install_name_tool -change "@rpath/librocksdb.8.dylib" "$out/lib/librocksdb.8.dylib" $out/lib/librocksdb.dylib
+    ${stdenv.cc.targetPrefix}install_name_tool -change "@rpath/librocksdb.${lib.versions.major version}.dylib" "$out/lib/librocksdb.${lib.versions.major version}.dylib" $out/lib/librocksdb.dylib
   '';
 
   meta = with lib; {