Squashed 'external/toxcore/c-toxcore/' content from commit 67badf69

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455

.clusterfuzzlite/Dockerfile

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+# c-toxcore Clusterfuzzlite build environment
+
+# We want to use the latest tools always
+FROM gcr.io/oss-fuzz-base/base-builder:latest
+
+RUN apt-get update && \
+    apt-get -y install --no-install-suggests --no-install-recommends \
+    cmake libtool autoconf automake pkg-config \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Static builds of dependencies
+
+# libsodium
+RUN git clone --depth 1 --branch 1.0.18 https://github.com/jedisct1/libsodium libsodium
+WORKDIR $SRC/libsodium
+RUN ./autogen.sh && ./configure --enable-shared=no && make install
+WORKDIR $SRC
+
+# Copy your project's source code.
+COPY . $SRC/c-toxcore
+# Working directory for build.sh.
+WORKDIR $SRC/c-toxcore
+RUN git submodule update --init --recursive
+# Copy build.sh into $SRC dir.
+COPY ./.clusterfuzzlite/build.sh $SRC/