[GHC] #11981: unknown symbol `__udivti3' when BuildFlavour = perf-llvm

[GHC]

#11981: unknown symbol `__udivti3' when BuildFlavour = perf-llvm
-------------------------------------+-------------------------------------
        Reporter:  erikd             |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by erikd):

 If I move `inplace/lib/bin/ghc-iserv` to `inplace/lib/bin/ghc-iserv.exe`
 and then created shell script at `inplace/lib/bin/ghc-iserv` containing:
 {{{
 #!/bin/bash
 gdb --args inplace/lib/bin/ghc-iserv.exe $@
 }}}

 Then I can run `ghc-iserv` under gdb and get a backtrace:

 {{{
 Thread 1 "ghc-iserv.exe" received signal SIGSEGV, Segmentation fault.
 0x0000000040aba3ff in ?? ()
 (gdb) bt
 #0  0x0000000040aba3ff in ?? ()
 #1  0x0000000040dbcf52 in ?? ()
 #2  0x0000000040112d81 in ?? ()
 #3  0x0000000001345e18 in MainCapability ()
 #4  0x0000000200098eb8 in ?? ()
 #5  0x00000002000910c0 in ?? ()
 #6  0x0000000000000000 in ?? ()
 (gdb) quit
 }}}

 which tells me very little.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11981#comment:12>
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