在Linux CentOS 7上,如何强制系统使用cmake3？

Question

我试图在我的Linux CentOS 7.3上安装PyTorch.我下载了它的包,运行此命令并得到此错误:

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!

所以我尝试使用该命令安装CMake 3

sudo yum -y install cmake3

安装顺利,但系统仍然使用cmake2.8作为默认设置.如果我输入yum info comnmand,我会得到:

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.

所以,问题很明显:系统仍然将cmake2.8视为默认值,因此Python不会将cmake3用于其PyTorch安装. 我怎么解决这个问题？

谢谢

Answer 1

一旦在计算机上安装cmake了cmake3软件包和软件包,就可以使用update-alternatives在两个软件包之间切换.

使用该alternatives命令注册两个安装:

$ 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

cmake3当您cmake从bash提示符输入或启动bash脚本时,默认情况下将调用这两个命令.这些命令还负责注册一些ctest需要与之一起切换的附加从命令cmake.

如果需要切换回cmake 2.8作为默认值,请运行以下命令:

$ 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

Answer 2

如果您没有 root 访问权限，只需创建一个像这样的链接（因为 ~/bin 通常位于您的 PATH 中）：

ln -s /usr/bin/cmake3 ~/bin/cmake

Answer 3

在 Centos 7 上安装 cmake3 后创建此符号链接对我有用：

sudo ln -s /usr/bin/cmake3 /usr/bin/cmake

Answer 4

在 Centos 上，程序包cmake3 包含一个名为cmake3. 因为大多数程序执行时cmake都找不到cmake3。

像往常一样，您可以在某处创建一个名为cmake该链接的链接/usr/bin/cmake3，并将该链接的目录放置在PATH变量中的其他目录之前。