Alexey Serbin has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/15492 )

Change subject: WIP: iwyu: standardize on libc++
......................................................................


Patch Set 2:

(2 comments)

Thank you very much for doing this!

http://gerrit.cloudera.org:8080/#/c/15492/2//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/15492/2//COMMIT_MSG@35
PS2, Line 35: Seems
            : like some codebases are comfortable including <new> for such 
usage; should
            : we follow suit?
> Patching IWYU to omit <new> would be better.
I'm OK with either approach here.  Probably, not including the <new>  header 
could save a bit of compilation time, but I don't think that would be much.

As per https://en.cppreference.com/w/cpp/memory/new/operator_new , signatures 
like 1-4 should not require inclusion of the <new> header:

  The versions (1-4) are implicitly declared in each translation unit even if 
the <new> header is not included.

Patching iwyu to avoid the recommendation of including the <new> header seems 
safe, even if using some coarse blanket-style rule that ignores other 
signatures (5-22).  There should be a compiler error if not including required 
<new> as required anyways.


http://gerrit.cloudera.org:8080/#/c/15492/2/build-support/iwyu/mappings/system-linux.imp
File build-support/iwyu/mappings/system-linux.imp:

http://gerrit.cloudera.org:8080/#/c/15492/2/build-support/iwyu/mappings/system-linux.imp@41
PS2, Line 41: <time.h>
> <ctime> instead?
It might be tricky with IWYU if doing so, but it might work, indeed.  Last time 
I tried that with 'clockid_t' (se line 37), it didn't work.



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ic807745271642b3d5d80ea0ad9bc413bdb0e34b5
Gerrit-Change-Number: 15492
Gerrit-PatchSet: 2
Gerrit-Owner: Adar Dembo <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Bankim Bhavsar <[email protected]>
Gerrit-Reviewer: Grant Henke <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Comment-Date: Thu, 19 Mar 2020 18:38:48 +0000
Gerrit-HasComments: Yes

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