[GHC] #12755: Build from source fails on Ubuntu 16.10: ld: -r and -pie may not be used together

[GHC]

#12755: Build from source fails on Ubuntu 16.10: ld: -r and -pie may not be used
together
-------------------------------------+-------------------------------------
        Reporter:  SamuelMarks       |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  high              |            Milestone:  8.0.2
       Component:  Build System      |              Version:  8.0.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Building GHC      |  (amd64)
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12759            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  new => closed
 * resolution:   => duplicate
 * related:   => #12759
 * milestone:   => 8.0.2


Comment:

 The problem here is that we pass `-Wl,-r` to `gcc` when joining object
 files and linking libraries. This is incompatible with the implicit `-pie`
 which the affected gcc versions assume. It turns out that GCC 6 has a `-r`
 flag which we could use in place of `-Wl,-r` and would do the right thing.
 Unfortunately it is undocumented so I'm rather reluctant to depend upon
 it.

 Really I suspect the correct solution here is to simply use `ld` directly
 for everything except for the final link (since linking an executable will
 likely require linking against `libgcc`). However, this is out of scope
 for 8.0.2.

 Consequently, I think the next best solution is to simply ensure we pass
 `-no-pie` to `gcc` when we do not intend on linking an executable. I have
 done exactly this in Phab:D2691 which has been merged to `master`
 (bae4a55b1fb403f610b4b55a1b6fb3f03e9c2026) and `ghc-8.0` ().

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12755#comment:3>
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