[MacPorts] #57155: clang-3.4 seg fault building ld64-127

[MacPorts]

#57155: clang-3.4 seg fault building ld64-127
---------------------------------+----------------------
  Reporter:  cheongi             |      Owner:  jeremyhu
      Type:  defect              |     Status:  assigned
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:  2.5.3
Resolution:                      |   Keywords:
      Port:  clang-3.4 ld64-127  |
---------------------------------+----------------------

Comment (by kencu):

 I just went through the LibcxxOnOlderSystems instructions from the start
 on a pristine 10.6.8 VM running the current MacPorts. It worked
 successfully, and I have a complete libcxx system with clang-3.7, a
 current cctools, a current ld64-latest, and all the supporting software.

 I noticed a couple of things that might not be obvious from the
 instructions.

 In Step 5, you are to update variants.conf with some new entries. The bit
 as written can't be copy-pasted
 {{{
 -llvm34
 +llvm39 # You may need to update this to +llvm40 and higher in the future
 }}}
 You need this instead, as the comment doesn't work here:
 {{{
 -llvm34
 +llvm39
 }}}
 You will be asked a number of time if you want to rebuild your installed
 ports because of mismatches between libstdc++ and libc++ . This is a new
 feature of MacPorts that didn't exist when the LibcxxOnOlderSystems
 instructions were written. I would suggest you do NOT do this along the
 way. Instead, do the following:

 Step 8 (update variants.conf again)
 Step 12 (uninstall llvm-3.4 and clang-3.4)
 Then run `sudo port -v rev-upgrade` and let it rebuild the smaller ports
 it wants to rebuild.

 Then do steps 9, 10, and 11.

 At this point, I would uninstall all your ports on macports, and most
 likely it would be best to start completely clean, by do a complete
 uninstall to make sure you have a stock setup:

 <https://guide.macports.org/chunked/installing.macports.uninstalling.html>

 Then install from the 10.6.8 Installer package
 <https://github.com/macports/macports-
 base/releases/download/v2.5.4/MacPorts-2.5.4-10.6-SnowLeopard.pkg>, and
 then run through as I specified.



 Please report back any issues or concerns.

-- 
Ticket URL: <https://trac.macports.org/ticket/57155#comment:5>
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