tools/docker: Add ubuntu 18.04 clang-9.

tools/docker/ubuntu-18.04-clang-9

@@ -0,0 +1,61 @@
+FROM ubuntu:18.04
+
+RUN \
+    apt-get update && \
+    apt-get install -y software-properties-common && \
+    add-apt-repository -y ppa:mhier/libboost-latest && \
+    add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
+    apt-get update && \
+    apt-get install --no-install-recommends -y \
+        autoconf \
+        autoconf-archive \
+        autoconf2.13 \
+        automake \
+        autotools-dev \
+        boost1.68 \
+        build-essential \
+        clang-9 \
+        cmake \
+        curl \
+        libbz2-dev \
+        libgflags-dev \
+        libmagic-dev \
+        libnss-db \
+        libsnappy-dev \
+        libsodium-dev \
+        libssl1.0-dev \
+        libtool \
+        libzstd-dev \
+        shtool \
+        xz-utils \
+        zlib1g-dev && \
+    apt-get clean && \
+    apt-get autoremove --purge -y
+
+ENV ROCKSDB_VERSION=5.16.6
+
+RUN \
+    mkdir -p /tmpbuild/rocksdb && \
+    cd /tmpbuild/rocksdb && \
+    curl -sL https://github.com/facebook/rocksdb/archive/v${ROCKSDB_VERSION}.tar.gz -o rocksdb-${ROCKSDB_VERSION}.tar.gz && \
+    tar xfvz rocksdb-${ROCKSDB_VERSION}.tar.gz && \
+    cd /tmpbuild/rocksdb/rocksdb-${ROCKSDB_VERSION} && \
+    cmake -H. -Bbuild \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DWITH_TESTS=0 \
+        -DWITH_TOOLS=0 \
+        -DUSE_RTTI=1 \
+        -DWITH_ZLIB=1 \
+        -DWITH_SNAPPY=1 \
+        -DBUILD_SHARED_LIBS=1 && \
+    cmake --build build --target install && \
+    rm -Rf /tmpbuild/
+
+RUN mkdir /build
+
+ENV CC clang-9
+ENV CXX clang++-9
+
+WORKDIR /build
+
+CMD [ "/bin/bash" ]