added a dockerfile that builds on arm

Dockerfile_arm

@@ -0,0 +1,124 @@
+# This file is part of SymCC.
+#
+# SymCC is free software: you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# SymCC is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# SymCC. If not, see <https://www.gnu.org/licenses/>.
+
+#
+# The build stage
+#
+FROM ubuntu:20.04 AS builder
+
+# Install dependencies
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+        cargo \
+        clang-10 \
+        cmake \
+        g++ \
+        git \
+        libz3-dev \
+        llvm-10-dev \
+        llvm-10-tools \
+        ninja-build \
+        python2 \
+        python3-pip \
+        zlib1g-dev \
+    && rm -rf /var/lib/apt/lists/*
+RUN pip3 install lit
+
+# Build AFL.
+RUN git clone -b v2.56b https://github.com/google/AFL.git afl \
+    && cd afl \
+    && LLVM_CONFIG=llvm-config-10 AFL_NO_X86=1 make && CC=clang-10 LLVM_CONFIG=llvm-config-10  make -C llvm_mode
+
+# Download the LLVM sources already so that we don't need to get them again when
+# SymCC changes
+RUN git clone -b llvmorg-10.0.1 --depth 1 https://github.com/llvm/llvm-project.git /llvm_source
+
+# Build a version of SymCC with the simple backend to compile libc++
+COPY . /symcc_source
+
+# Init submodules if they are not initialiazed yet
+WORKDIR /symcc_source
+RUN if git submodule status | grep "^-">/dev/null ; then \
+    echo "Initializing submodules"; \
+    git submodule init; \
+    git submodule update; \
+    fi
+
+WORKDIR /symcc_build_simple
+RUN cmake -G Ninja \
+        -DQSYM_BACKEND=OFF \
+        -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+        -DZ3_TRUST_SYSTEM_VERSION=on \
+        /symcc_source \
+    && ninja check
+
+# Build SymCC with the Qsym backend
+WORKDIR /symcc_build
+RUN cmake -G Ninja \
+        -DQSYM_BACKEND=ON \
+        -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+        -DZ3_TRUST_SYSTEM_VERSION=on \
+        /symcc_source \
+    && ninja check \
+    && cargo install --path /symcc_source/util/symcc_fuzzing_helper
+
+# Build libc++ with SymCC using the simple backend
+WORKDIR /libcxx_symcc
+RUN export SYMCC_REGULAR_LIBCXX=yes SYMCC_NO_SYMBOLIC_INPUT=yes \
+    && mkdir /libcxx_symcc_build \
+    && cd /libcxx_symcc_build \
+    && cmake -G Ninja /llvm_source/llvm \
+         -DLLVM_ENABLE_PROJECTS="libcxx;libcxxabi" \
+         -DLLVM_TARGETS_TO_BUILD="X86" \
+         -DLLVM_DISTRIBUTION_COMPONENTS="cxx;cxxabi;cxx-headers" \
+         -DCMAKE_BUILD_TYPE=Release \
+         -DCMAKE_INSTALL_PREFIX=/libcxx_symcc_install \
+         -DCMAKE_C_COMPILER=/symcc_build_simple/symcc \
+         -DCMAKE_CXX_COMPILER=/symcc_build_simple/sym++ \
+    && ninja distribution \
+    && ninja install-distribution
+
+#
+# The final image
+#
+FROM ubuntu:20.04
+
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y \
+        build-essential \
+        clang-10 \
+        g++ \
+        libllvm10 \
+        zlib1g \
+        sudo \
+    && rm -rf /var/lib/apt/lists/* \
+    && useradd -m -s /bin/bash ubuntu \
+    && echo 'ubuntu ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/ubuntu
+
+COPY --from=builder /symcc_build /symcc_build
+COPY --from=builder /root/.cargo/bin/symcc_fuzzing_helper /symcc_build/
+COPY util/pure_concolic_execution.sh /symcc_build/
+COPY --from=builder /libcxx_symcc_install /libcxx_symcc_install
+COPY --from=builder /afl /afl
+
+ENV PATH /symcc_build:$PATH
+ENV AFL_PATH /afl
+ENV AFL_CC clang-10
+ENV AFL_CXX clang++-10
+ENV SYMCC_LIBCXX_PATH=/libcxx_symcc_install
+
+USER ubuntu
+WORKDIR /home/ubuntu
+COPY sample.cpp /home/ubuntu/
+RUN mkdir /tmp/output