linux - Ubuntu apt-get 找不到任何版本的 gcc 和 g++

Question

我试图在我的 Ubuntu 虚拟机上编译一些 C++ 程序，它需要 g++ 4.9 及更高版本。但是我发现这台机器上的g++只有4.6.3版本，所以我尝试用这个命令更新g++和gcc:

sudo apt-get install gcc='4.9' g++='4.9'

它返回:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Version '4.9' for 'gcc' was not found
E: Version '4.9' for 'g++' was not found

奇怪的是，我又试了另一个4.6版本，也返回了同样的字样。

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Version '4.6' for 'gcc' was not found
E: Version '4.6' for 'g++' was not found

我的机器怎么了？

Answer 1

您需要指向较旧的 Ubuntu 版本。

他们有 as seen here for gcc-4.9和 here for gcc-4.6 .