无法安装 gcc-7

无法安装 gcc-7

我最近从 Windows 迁移到了 Ubuntu(实际上是运行 Ubuntu 的 Codeanywhere),需要升级到 gcc 7,因为它附带了 gcc 4.8.2,而我需要 C++ 17。我在终端上执行了以下命令:

 $ sudo apt-get install software-properties-common python-software-properties
 $ sudo add-apt-repository ppa:jonathonf/gcc-7.1
 $ sudo apt-get update
 $ sudo apt-get install gcc-7 g++-7

但我收到以下错误:

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:

g++-7 : Depends: libisl15 (>= 0.15) but it is not installable
        Depends: libmpfr4 (>= 3.1.3) but 3.1.2-1 is to be installed
gcc-7 : Depends: cpp-7 (= 7.1 .8-10ubuntu1~14.04.york8) but it is not going to be installed
        Depends: binutils (>= 2.26.1) but 2.24-5ubuntu14.2 is to be installed
        Depends: libisl15 (>= 0.15) but it is not installable
        Depends: libmpfr4 (>= 3.1.3) but 3.1.2-1 is to be installed

E: Unable to correct problems, you haye held broken packages.

Ubuntu 版本:

 $ cat /etc/lsb*
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"

我需要做什么?
抱歉我的英语不好。

编辑
丢失的包裹是libisl15 (>= 0.15),而不是libisllS (>= 8.15)。抱歉。

答案1

该 PPA仅发布了针对 Ubuntu 16.04 的软件包,但您尝试在 Ubuntu 14.04 上使用它们。这就是您遇到问题的原因。

您是否有令人信服的理由使用 14.04?16.04 是长期支持的最新版本 (LTS),而 17.04 是最新版本(这就是为什么这两个版本在下载页面)。

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