[GHC] #11036: powerpc/linux: undefined reference to `__sync_sub_and_fetch_8

[GHC]

#11036: powerpc/linux: undefined reference to `__sync_sub_and_fetch_8
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        Reporter:  erikd                |                Owner:  erikd
            Type:  bug                  |               Status:  new
        Priority:  normal               |            Milestone:  8.0.1
       Component:  Compiler             |              Version:  7.11
      Resolution:                       |             Keywords:
Operating System:  Linux                |         Architecture:  powerpc
 Type of failure:  Building GHC failed  |            Test Case:
      Blocked By:                       |             Blocking:
 Related Tickets:                       |  Differential Rev(s):
       Wiki Page:                       |
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Changes (by erikd):

 * owner:   => erikd


Comment:

 Looks like the following fix will work.

 {{{
 diff --git a/rts/Linker.c b/rts/Linker.c
 index 98969b9..e7bb8f0 100644
 --- a/rts/Linker.c
 +++ b/rts/Linker.c
 @@ -1217,7 +1217,7 @@ static void m32_allocator_init(m32_allocator m32) {
   * You shouldn't have to use this method. Use `m32_free` instead.
   */
  static void m32_free_internal(void * addr) {
 -   uint64_t c = __sync_sub_and_fetch((uint64_t*)addr, 1);
 +   uintptr_t c = __sync_sub_and_fetch((uintptr_t*)addr, 1);
     if (c == 0) {
        munmapForLinker(addr, getPageSize());
     }
 }}}

 Need to test on powerpc, x86_64 and arm at least.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11036#comment:1>
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