Build a newer cmake in Docker image.

docker/centos-6.7/Dockerfile

@@ -2,21 +2,30 @@ FROM centos:6.7
 
 MAINTAINER Colm Ryan <[email protected]>
 
-#install gcc toolchain
+# install gcc toolchain
 RUN yum update -y
 RUN yum install -y centos-release-scl-rh
 RUN yum install -y devtoolset-3-gcc devtoolset-3-gcc-c++
 
-#a few other tools
+# a few other tools
 RUN yum install -y git cmake wget tar bzip2
 
-#default to the devtools toolchain
+# default to the devtools toolchain
 RUN echo "source /opt/rh/devtoolset-3/enable" >> /root/.bashrc
 
-#install hdf5
+# install hdf5
 RUN source /opt/rh/devtoolset-3/enable && mkdir hdf5 && cd /hdf5 && \
   wget http://www.hdfgroup.org/ftp/HDF5/current/src/hdf5-1.8.17.tar.bz2 && \
-  tar xjf hdf5-1.8.17.tar.bz2 && \
+  tar xf hdf5-1.8.17.tar.bz2 && \
   cd hdf5-1.8.17 && \
   ./configure --prefix=/usr/local/hdf5 --enable-cxx && \
   make install
+
+# install a newer cmake
+RUN source /opt/rh/devtoolset-3/enable && mkdir cmake && cd /cmake && \
+  wget https://cmake.org/files/v3.6/cmake-3.6.3.tar.gz && \
+  tar xf cmake-3.6.3.tar.gz && \
+  cd cmake-3.6.3 && \
+  cmake . && \
+  make && \
+  make install