I tried to install PyTorch on my Linux CentOS 7.3. I downloaded its package, ran this command and got this error:
sudo python setup.py install
running install
running build_deps
CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
CMake 3.0 or higher is required. You are running version 2.8.12.2
-- Configuring incomplete, errors occurred!
So I tried to install CMake 3 by using the command
sudo yum -y install cmake3
The installation went alright, but the system still uses cmake2.8 as default. If I type the yum info comnmand, I get this:
sudo yum info cmake
Installed Packages
Name : cmake
Arch : x86_64
Version : 2.8.12.2
Release : 2.el7
Size : 27 M
Repo : installed
From repo : base
Summary : Cross-platform make system
URL : http://www.cmake.org
License : BSD and MIT and zlib
Description : CMake is used to control the software compilation process using simple
: platform and compiler independent configuration files. CMake generates
: native makefiles and workspaces that can be used in the compiler
: environment of your choice. CMake is quite sophisticated: it is possible
: to support complex environments requiring system configuration, preprocessor
: generation, code generation, and template instantiation.
So, the problem is clear: the system still sees cmake2.8 as default, and therefore Python does not use cmake3 for its PyTorch installation. How can I solve this problem?
Thanks
CMake is a program that lets us produce project files for a variety of environments from applications/software code. Because the project files are created independently using CMake, we are no longer bound to a particular IDE. Due to its cross-platform accessibility, it is available for Linux-based distros.
Once you have both the cmake
and the cmake3
package installed on your machine, you can use update-alternatives to switch between both packages.
Use the alternatives
command to register both installations:
$ sudo alternatives --install /usr/local/bin/cmake cmake /usr/bin/cmake 10 \
--slave /usr/local/bin/ctest ctest /usr/bin/ctest \
--slave /usr/local/bin/cpack cpack /usr/bin/cpack \
--slave /usr/local/bin/ccmake ccmake /usr/bin/ccmake \
--family cmake
$ sudo alternatives --install /usr/local/bin/cmake cmake /usr/bin/cmake3 20 \
--slave /usr/local/bin/ctest ctest /usr/bin/ctest3 \
--slave /usr/local/bin/cpack cpack /usr/bin/cpack3 \
--slave /usr/local/bin/ccmake ccmake /usr/bin/ccmake3 \
--family cmake
After these two commands, cmake3
will be invoked by default, when you enter cmake
from a bash prompt or start a bash script. The commands also take care of registering a few secondary commands like ctest
which need to be switched along with cmake
.
If you need to switch back to cmake 2.8 as the default, run the following command:
$ sudo alternatives --config cmake
There are 2 programs which provide 'cmake'.
Selection Command
-----------------------------------------------
1 cmake (/usr/bin/cmake)
*+ 2 cmake (/usr/bin/cmake3)
Enter to keep the current selection[+], or type selection number: 1
Creating this symbolic link after installing cmake3 on Centos 7 worked for me:
sudo ln -s /usr/bin/cmake3 /usr/bin/cmake
In case you don't have root access, just create a link like this:
ln -s /usr/bin/cmake3 ~/bin/cmake
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