[GHC] #11445: Turn on SplitSections by default

[GHC]

#11445: Turn on SplitSections by default
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        Reporter:  ezyang            |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Build System      |              Version:  8.0.1-rc1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:  11285
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by refold):

 The gold linker only supports ELF, so it can't be used on OS X and
 Windows.

 GNU ld didn't support `--gc-sections` for PE/COFF
 [https://sourceware.org/git/gitweb.cgi?p=binutils-
 gdb.git;h=0f088b2a9417b1d4ed597849ffa671eba25f5051 until recently], and
 this feature [https://ghc.haskell.org/trac/ghc/ticket/8405#comment:20
 still appears to be buggy] according to olsner. So we'll need to fix those
 bugs in ld to make `-split-sections` work on Windows.

 According to the links you provided, OS X ld doesn't support `--gc-
 sections` at all, but maybe the `-dead_strip` option could be used.

 So on ELF platforms `-split-sections` should be ready to replace `-split-
 objs`; further testing and investigation is necessary on Windows and OS X.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11445#comment:2>
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