[GHC] #16153: ghc 8.6.3 fails to build on macOS Sierra, High Sierra and Mojave (10.12 to 10.14)

[GHC]

#16153: ghc 8.6.3 fails to build on macOS Sierra, High Sierra and Mojave (10.12 to
10.14)
-------------------------------------+-------------------------------------
        Reporter:  fxcoudert         |                Owner:  (none)
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  MacOS X           |         Architecture:  x86_64
 Type of failure:  GHC doesn't work  |  (amd64)
  at all                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  new => infoneeded


Comment:

 Most of the test failures I see in that log are of the form:

 {{{
 =====> T9776(normal) 1124 of 6521 [0, 129, 0]
 cd "./driver/T9776.run" &&
 "/private/tmp/ghc-20190108-10122-1a2rxgx/ghc-8.6.3/inplace/bin/ghc-stage2"
 -c T9776.hs -dcore-lint -dcmm-lint -no-user-package-db -rtsopts -fno-warn-
 missed-specialisations -fshow-warning-groups -fdiagnostics-color=never
 -fno-diagnostics-show-caret -dno-debug-output  -drule-check--- /dev/null
 2019-01-08 18:24:33.000000000 +0000
 +++
 ./driver/write_interface_oneshot.run/write_interface_oneshot.run.stderr.normalised
 2019-01-08 18:24:33.000000000 +0000
 @@ -0,0 +1 @@
 +make[3]: warning: jobserver unavailable: using -j1.  Add `+' to parent
 make rule.
 }}}

 This is because `-j` was passed to `make test`. Try removing `-j` from the
 `make test` invocation.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16153#comment:2>
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