GCC在linux mint上的最新更新

Question

我在linux上更新了gcc的版本，但当我检查时，它似乎没有安装。有什么问题吗？

joseph@joseph:~$ sudo apt install gcc-9
Reading package lists... Done
Building dependency tree       
Reading state information... Done
gcc-9 is already the newest version (9.2.1-17ubuntu1~18.04.1).
The following packages were automatically installed and are no longer required:
  codeblocks-common libcodeblocks0 libwxbase3.0-0v5 libwxgtk3.0-0v5
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 240 not upgraded.

joseph@joseph:~$ gcc --version
gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Answer 1

基于Debian的发行版可以有相同软件的多个版本。

检查一下/usr/bin/gcc。您将看到，它是指向/etc/alternatives/gcc的符号链接，也是指向/usr/bin/gcc-7的符号链接。

命令update-alternatives --config gcc将为您提供选择正确版本的选项。

如果你删除gcc-7，它将自动选择另一种选择。