“g ++”和“c ++”编译器 [英] "g++" and "c++" compiler

问题描述

我刚在Ubuntu上发现，有两个不同的C ++编译器：/ usr / bin / g ++和/ usr / bin / c ++。我不熟悉后者，但是人类c ++只是跳转到gcc的联机帮助页。我不知道他们与C ++编译器有什么区别？

感谢和问候！

解决方案>

如果你 ls -l / usr / bin / c ++ 这是典型的Ubuntu符号链接混乱。

< ，你会看到它实际上是一个符号链接。到：

  / etc / alternatives / c ++ 
  

这又是一个符号链接：

  / usr / bin / g ++ 
  

因此，在Ubuntu系统上，c ++ 是 g ++。链接间接的背后的原因是有多个包可以提供一个c ++编译器（如不同版本的g ++）。你会看到这很多在Ubuntu上。例如，qmake是/ etc / alternatives中的文件的链接，这是（在我的系统上）回到/ usr / bin / qmake-qt3的链接。

I just found on my Ubuntu, there are two different C++ compiler: /usr/bin/g++ and /usr/bin/c++. I am not familiar with the latter, but man c++ just jumps to the manpage of gcc. I wonder what is their difference as C++ compilers?

Thanks and regards!

解决方案

This is typical Ubuntu symlink mayhem.

If you ls -l /usr/bin/c++, you will see it is actually a symbolic link. to:

/etc/alternatives/c++

Which in turn, is also a symbolic link to:

/usr/bin/g++

So, on Ubuntu systems, c++ is g++. The reasoning behind the link indirection is that there are multiple packages that could provide a c++ compiler (such as different versions of g++). You'll see this a lot on Ubuntu. For example, qmake is a link to a file in /etc/alternatives, which is (on my system) a link back to /usr/bin/qmake-qt3.

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