Upgrade CMake to newer version.

Dockerfile-ubuntu1804

 MAINTAINER Ray Burgemeestre
 
 RUN apt-get update && \
-    apt-get -y install g++ git cmake sudo wget gnupg2 && \
+    apt-get -y install g++ git sudo wget gnupg2 && \
+    apt-get -y install libssl-dev build-essential && \
     \
     echo deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-7 main >> /etc/apt/sources.list && \
     echo deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic-7 main >> /etc/apt/sources.list && \
     \
     rm -rf /var/lib/apt/lists/*
 
+# Install newer CMake to avoid some warnings the "FindBoost" script throws on
+#  more recent versions of boost that the system CMake doesn't now about.
+RUN wget https://github.com/Kitware/CMake/releases/download/v3.16.2/cmake-3.16.2.tar.gz && \
+    tar -zxf cmake-3.16.2.tar.gz && \
+    pushd cmake-3.16.2 && \
+    ./bootstrap && \
+    make -j $(nproc) && \
+    make install && \
+    popd && \
+    rm -rf cmake-3.16.2 && \
+    rm -rf cmake-3.16.2.tar.gz
+
 CMD "/bin/bash"

Makefile

 
 ubuntu1804publish:
 	docker push rayburgemeestre/build-ubuntu:18.04
+
+shell:
+	docker run -it -v $$PWD:$$PWD --workdir $$PWD rayburgemeestre/build-ubuntu:18.04 /bin/bash