introduce bob

.circleci/Dockerfile

+FROM centos:7
+
+RUN set -e;\
+	yum install -y epel-release; \
+	yum install -y \
+	    automake \
+	    git \
+	    jemalloc-devel \
+	    libedit-devel \
+	    libtool \
+	    libunwind-devel \
+	    make \
+	    pcre-devel \
+	    python3 \
+	    python-sphinx

.circleci/Dockerfile.alpine

+FROM alpine
+
+RUN set -e; \
+	apk update; \
+	apk add -q \
+	    autoconf \
+	    automake \
+	    build-base \
+	    ca-certificates \
+	    cpio \
+	    git \
+	    gzip \
+	    libedit-dev \
+	    libtool \
+	    libunwind-dev \
+	    linux-headers \
+	    pcre-dev \
+	    py-docutils \
+	    py3-sphinx \
+	    tar

.circleci/Dockerfile.archlinux

+FROM archlinux
+
+RUN set -e; \
+	pacman -Sy --noconfirm \
+	       base-devel \
+	       ca-certificates \
+	       cpio \
+	       git \
+	       libedit \
+	       libtool \
+	       libunwind \
+	       linux-headers \
+	       pcre \
+	       python-docutils \
+	       python-sphinx \
+	       tar

.circleci/Dockerfile.ubuntu

+FROM ubuntu
+
+RUN set -e; \
+	export DEBIAN_FRONTEND=noninteractive; \
+	export DEBCONF_NONINTERACTIVE_SEEN=true; \
+	apt-get update; \
+	apt-get install -y \
+	    autoconf \
+	    automake \
+	    build-essential \
+	    ca-certificates \
+	    cpio \
+	    git \
+	    graphviz \
+	    libedit-dev \
+	    libjemalloc-dev \
+	    libncurses-dev \
+	    libpcre3-dev \
+	    libtool \
+	    libunwind-dev \
+	    pkg-config \
+	    python3-sphinx