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Update cmake to version 3 in Centos

Update cmake to version 3 in Centos

Recently, I wanted to build a docker image that had not been touched for several months. Unfortunately build process failed with message "CMake 3.6.0 or higher is required. You are running version".

There are two ways to update cmake from 2.* to 3.*:

sudo yum install epel-release cmake3
sudo yum remove cmake
sudo ln -s /usr/bin/cmake3 /usr/bin/cmake

But sometimes that does not work, like in my case. I saw message that no package cmake3 available. That's why there is second option:

sudo set -ex \
  && for key in C6C265324BBEBDC350B513D02D2CEF1034921684; do \
    gpg --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
    gpg --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
    gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \

sudo set -ex \
  && curl -fsSLO --compressed https://cmake.org/files/v3.6/cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz \
  && curl -fsSLO --compressed https://cmake.org/files/v3.6/cmake-${CMAKE_VERSION}-SHA-256.txt.asc \
  && curl -fsSLO --compressed https://cmake.org/files/v3.6/cmake-${CMAKE_VERSION}-SHA-256.txt \
  && gpg --verify cmake-${CMAKE_VERSION}-SHA-256.txt.asc cmake-${CMAKE_VERSION}-SHA-256.txt \
  && grep "cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz\$" cmake-${CMAKE_VERSION}-SHA-256.txt | sha256sum -c - \
  && tar xzf cmake-${CMAKE_VERSION}-Linux-x86_64.tar.gz -C /usr/local --strip-components=1 --no-same-owner \
  && rm -rf cmake-${CMAKE_VERSION}*

and that works perfect!