C ++：从命令行链接有问题 [英] C++: having trouble linking from command line

问题描述

在这里开始使用C ++。我正在使用Eclipse CDT进行OSX工作。我有一个项目与一些自定义类和两个文件Test.hpp和Test.cpp - 后来与我的main（）方法，运行一些测试，我已经定义和实现在这两个文件。

Just getting started with C++ here. I am working on OSX with Eclipse CDT. I have a project with some custom classes and two files "Test.hpp" and "Test.cpp" - the later with my main() method that runs some tests that I have defined and implemented in these two files.

我可以从Eclipse中编译并运行没有问题，但是当我尝试从命令行用g ++ Test.cpp编译时，我得到了很多链接错误，基本上列出所有在Test.cpp中定义或引用的方法作为未定义的符号。

I can compile and run from Eclipse with no problems, but when I try to compile from the command line with "g++ Test.cpp" I get a lot of linking errors that basically list all the methods defined in or referenced from Test.cpp as undefined symbols.

我以类似的方式编译了几个基本程序（一个头文件和一个实现文件）命令行没有任何问题，但我不知道为什么这一个将不工作。请帮助！

I have compiled a few basic programs (one header file and one implementation file) in similar manner from the command line without any problems, but I can't figure out why this one won't work. Please help!

编辑：我的措辞不清楚，但是我还有其他源文件。接受的答案做了诀窍：g ++ Test.cpp Other1.cpp Other2.cpp。谢谢。

It wasn't clear from my wording, but yes I have other source files too. The accepted answer did the trick: "g++ Test.cpp Other1.cpp Other2.cpp". Thank you.

推荐答案

命令'g ++ Test.cpp'既是编译又是链接。如果你有很多源文件，你应该链接Test.cpp与他们太像g ++ Test.cpp other1.cpp other2.cpp或只是编译所有文件，并链接他们一起后，像'g ++ Test.o other1.o other2 .o'。

Command 'g++ Test.cpp' does both compilation and linking. If you have many source files, you should link Test.cpp with them too like 'g++ Test.cpp other1.cpp other2.cpp' or just compile all files and link them all together later like 'g++ Test.o other1.o other2.o'.

这篇关于C ++：从命令行链接有问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！