[Feature] No "bits/stdc++.h" in macOS/clang

[w43322]

Verify steps

• [X] 我已经在 Issue Tracker 中找过我要提出的请求 I have searched on the Issue Tracker for a related feature request.
• [X] 我已经仔细看过 Documentation 并无法自行解决问题 I have read the Documentation and was unable to solve the issue.

Description

bits/stdc++.h is a gnu/gcc extension, which is not present in macOS/clang.

https://stackoverflow.com/questions/28994148/how-can-i-include-bits-stdc-in-xcode

Should we fix this rather than letting the users fix this for themselves?

Possible Solution

#ifndef __APPLE__
    #include <bits/stdc++.h>
#else
    // insert #include directives here, or make a copy of gcc's bits/stdc++.h
#endif

[j178]

Since we are emulating the LeetCode OJ, I think we should ship the bits/stdc++.h for macOS version. Like this one: https://github.com/tekfyl/bits-stdc-.h-for-mac/blob/master/stdc%2B%2B.h

[w43322]

I agree. Should I make a separate PR or should I include it in #137 ?

[j178]

It's better to create a separate PR.

[w43322]

We can use this command to fetch the latest stdc++.h directly from gcc's source repo: git archive --remote=git://gcc.gnu.org/git/gcc.git HEAD libstdc++-v3/include/precompiled/stdc++.h | tar -xO

[j178]

One question, if we include this file in our repo, do we have to change our license to GPL…

[w43322]

What if we run this command on the user's machine?

[j178]

What if we run this command on the user's machine?

I don't think we should do this automatically. Instead, we should add some instructions to our manual and let the users handle it themselves. Alternatively, we can simply have Mac users run brew install gcc :)