避免使用git重新编译并制作 [英] Avoid recompilation with git and make

问题描述

我在git中有两个开发分支，而我经常需要在这两个分支之间进行更改.但是，真正令人沮丧的是，每次更改git中的分支时，整个项目都会重建，因为某些文件的文件系统时间戳会更改.

I have two development branches in git and I frequently need to change between the two. However, the really frustrating thing is that every time I change branches in git, the entire project gets rebuilt because the file-system timestamps for some files will change.

Ofc，配置了makefile以将项目构建到两个不同的构建目录中.

Ofc, the makefiles are configured to build the project into two different build directories .

有什么办法解决吗?编译是一个非常漫长且耗时的过程...

Is there any way around this? Compilation is a very long and time-consuming process...

-这是对该问题的较详细的说明... 说我有一个头文件Basic.h，它包含在许多其他文件中. Basic.h在分支1和分支2之间有所不同.

- This is a slightly more detailed explanation of the question... Say I have a header files Basic.h which is included in a number of other files. Basic.h is different between branch 1 and branch 2.

现在让我们说我已经将分支1编译为build_branch1，将分支2编译为build_branch2.假设我目前有2个分支机构已签出.现在，我签出分支1并更改File1.cpp并重新编译.理想情况下，由于自从我上次编译以来只有File1.cpp发生了更改，因此这是唯一应重新编译的文件.

Now let's say I have compiled branch 1 into build_branch1 and branch 2 into build_branch2. Say I have branch 2 currently checked out. Now I checkout branch 1 and change File1.cpp and recompile. Ideally, since only File1.cpp has changed since I compiled it the last time, this is the only file that should be recompiled.

但是，由于检出更改了Basic.h的时间戳，因此将重新编译包括Basic.h在内的所有文件.我想避免这种情况.

However, since Basic.h has it's timestamp changed due to the checkout, all files that are including Basic.h will get recompiled. I want to avoid this.

推荐答案

Git仅更改分支之间更新的文件.但是，即使更改了单个文件，如果编译器进行了完全重建，则始终可以克隆不同的分支并将其签出到不同的目录中.就像:

Git changes only the files that are updated between branches. But if your compiler does a full rebuild even if any single file was changed you can always clone and checkout your different branches into different directories. That's like:

/your-repo-name.branch1
/your-repo-name.branch2

这会占用额外的磁盘空间，但比在大型存储库中切换发散的分支要方便得多.

This takes extra disk space but is much more convenient than switching divergent branches in a huge repo.

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