其他人提到归档，但另一个选项是 Unity builds 。

Others have mentioned archive, but another option is Unity builds.

而不是：

g++ -c file1.cpp file2.cpp

创建单独的unity文件

Create a separate "unity file"

// This is the entire file (unity.cpp)
#include "file1.cpp"
#include "file2.cpp"
// more if you want...

Then

g++ -c unity.cpp

在许多情况下，这也有更快的编译和链接的优点（因为 file1.cpp 和 file2.cpp 只解析一次）。但是，如果你把太多的文件放在一个单一的unity，然而然后你会发现，你需要重建更多的来源，而不是你想要的，所以你需要尝试和一个平衡。

This also has the advantage of faster compilation and linking in many cases (because headers used by both file1.cpp and file2.cpp are only parsed once). However, if you put too many files in a single unity however then you'll find that you need to rebuild more sources than you wanted to, so you need to try and strike a balance.