[MacPorts] #63026: clang-12 does not build with analyzer

[MacPorts]

#63026: clang-12 does not build with analyzer
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  Reporter:  szhorvat  |      Owner:  ken-cunningham-webuse
      Type:  defect    |     Status:  closed
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:  fixed     |   Keywords:
      Port:  clang-12  |
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Comment (by kencu):

 there is no need to reopen this ticket, as the analyzer is the default
 again (although I still hold to the idea that nearly nobody uses it). but
 that ship sailed...everyone must install perl.

 What is happening in your error is a parallel building issue that we have
 noticed in clang-12 and I have reported upstream. It seems to affect a
 small % of builds (it never happens to me, for example) but it does happen
 occasionally. I believe I know the cause.

 This time, the arm64 builder hit this issue. I have already forced another
 build on it. We'll see if it builds next time (in a couple of hours).
 After all, the arm64 builder built it fine last last time.

 Of course, I know I could stop this by disabling parallel building (again
 -- it was disabled briefly before). Then everyone would build clang-12
 with only 1 processor, which would take probably 8 - 10 hours. I was not
 prepared to tie up the whole buildbot farm for that insanity.

 However, if the arm64 builder fails again, I will do that, so the buildbot
 builds it.

 Maybe upstream will fix the bug. I reported it on the llvm-mailing-list,
 so feel free to go add your voice to the "Me Too!" list if you like. I
 would open a bug report in their bug reported, but they are just about to
 shut that bug reported down forever, so .... no point.

 As always, we appreciate your support here. If you are in a terrible hurry
 and don't care to wait, you can temporarily set your build.jobs to 1 in
 macports.conf, build it, and then delete the line.

 Would you say the better option would be to just stop parallel building
 for everyone, now that it's built on most of the buildbots anyway? Maybe
 so. I don't know. However, if/when I do that, the next ticket will then be
 from someone who re-enabled parallel building and found clang-12 built
 just fine, and in 1 hour instead of 8, and wants the parallel building re-
 enabled.

-- 
Ticket URL: <https://trac.macports.org/ticket/63026#comment:6>
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