[RocksDB] Add library (#7900)

* [RocksDB] Add library

* tweak arm flags

* fix

* add product

* fix flags

* mac fix

* drop failing arm fix

* Delete Manifest.toml

* Delete Project.toml

* Fix macos 10.15 build

* Add seemingly necessary patches

* Add patches

* Fix truncated patch

* Bump to gcc 8 for compatibility

* Drop arm7 and arm6 support

* Try cmake install invocation

* Update build_tarballs.jl

* Delete R/RocksDB/bundled/patches/mingw.patch

* Update build_tarballs.jl

* Incorporate PR feedback

* Install licenses

R/RocksDB/build_tarballs.jl

@@ -0,0 +1,76 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder, Pkg
+
+name = "RocksDB"
+version = v"8.9.1"
+
+# Collection of sources required to complete build
+sources = [
+    GitSource("https://github.com/facebook/rocksdb.git", "49ce8a1064dd1ad89117899839bf136365e49e79"),
+    ArchiveSource("https://github.com/phracker/MacOSX-SDKs/releases/download/10.15/MacOSX10.15.sdk.tar.xz",
+                  "2408d07df7f324d3beea818585a6d990ba99587c218a3969f924dfcc4de93b62"),
+    DirectorySource("./bundled"),
+]
+
+# Bash recipe for building across all platforms
+script = raw"""
+cd rocksdb
+
+# Apply patch for aarch
+if [[ "${target}" == aarch* ]]; then
+    atomic_patch -p1 ${WORKSPACE}/srcdir/patches/arm64.patch
+fi
+
+mkdir build && cd build
+
+# Resolve: error: aligned allocation function of type 'void *(std::size_t, std::align_val_t)' is only available on macOS 10.13 or newer
+if [[ "${target}" == x86_64-apple-darwin* ]]; then
+    echo "Installing newer MacOS 10.15 SDK"
+    export MACOSX_DEPLOYMENT_TARGET=10.15
+    # ...and install a newer SDK which supports `std::filesystem`
+    pushd $WORKSPACE/srcdir/MacOSX10.*.sdk
+    rm -rf /opt/${target}/${target}/sys-root/System
+    cp -ra usr/* "/opt/${target}/${target}/sys-root/usr/."
+    cp -ra System "/opt/${target}/${target}/sys-root/."
+    popd
+fi
+
+cmake -DCMAKE_INSTALL_PREFIX=${prefix} \
+    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} \
+    -DWITH_GFLAGS=0 \
+    -DROCKSDB_BUILD_SHARED=1 \
+    -DPORTABLE=1 \
+    -DWITH_TOOLS=0 \
+    -DWITH_TESTS=0 \
+    -DWITH_BENCHMARK_TOOLS=0 \
+    -DCMAKE_BUILD_TYPE=Release ..
+
+cmake --build . --parallel ${nproc}
+cmake --install .
+
+install_license ../LICENSE.apache ../LICENSE.leveldb
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = supported_platforms()
+platforms = expand_cxxstring_abis(platforms)
+filter!(p -> arch(p) ∉ ("armv7l", "armv6l"), platforms)
+filter!(!Sys.iswindows, platforms)
+
+# The products that we will ensure are always built
+products = [
+    LibraryProduct("librocksdb", :librocksdb),
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = [
+    Dependency(PackageSpec(name="snappy_jll", uuid="fe1e1685-f7be-5f59-ac9f-4ca204017dfd"))
+    Dependency(PackageSpec(name="Lz4_jll", uuid="5ced341a-0733-55b8-9ab6-a4889d929147"))
+    Dependency(PackageSpec(name="Zlib_jll", uuid="83775a58-1f1d-513f-b197-d71354ab007a"))
+    Dependency(PackageSpec(name="Zstd_jll", uuid="3161d3a3-bdf6-5164-811a-617609db77b4"))
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies; julia_compat="1.6", preferred_gcc_version=v"8")

R/RocksDB/bundled/patches/arm64.patch

@@ -0,0 +1,15 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -990,10 +990,10 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64")
+     util/crc32c_ppc_asm.S)
+ endif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64")
+
+-if(HAS_ARMV8_CRC)
++# if(HAS_ARMV8_CRC)
+   list(APPEND SOURCES
+     util/crc32c_arm64.cc)
+-endif(HAS_ARMV8_CRC)
++# endif(HAS_ARMV8_CRC)
+
+ if(WIN32)
+   list(APPEND SOURCES