Original fix submitted by 
  Sergei Trofimovich <slyfox@community.haskell.org>
modified by me:
 - exclude 64-bit types
 - compare uniques, not strings
 - #include "ffi.h" is conditional

Submitted by: Sergei Trofimovich <slyfox@community.haskell.org>
Re-recorded against HEAD.

rather than assuming that all GNU ar's do.
Apparently OpenBSD's older version doesn't.

mingw doesn't understand %llu/%lld - it treats them as 32-bit rather
than 64-bit. We use %I64u/%I64d instead.

I'm not sure what changed, but it now doesn't work for me without
the "Start in" field being set.

This stops us generating paths like
    c:\foo\/ghc460_0/ghc460_0.o
which windres doesn't understand.

Fixes bindist creation

This fixes a very rare heap corruption bug, whereby

 - a context switch is requested, which sets HpLim to zero
   (contextSwitchCapability(), called by the timer signal or
   another Capability).

 - simultaneously a stack check fails, in a code fragment that has
   both a stack and a heap check.

The RTS then assumes that a heap-check failure has occurred and
subtracts HpAlloc from Hp, although in fact it was a stack-check
failure and retreating Hp will overwrite valid heap objects.  The bug
is that HpAlloc should only be set when Hp has been incremented by the
heap check.  See comments in rts/HeapStackCheck.cmm for more details.

This bug is probably incredibly rare in practice, but I happened to be
working on a test that triggers it reliably:
concurrent/should_run/throwto001, compiled with -O -threaded, args 30
300 +RTS -N2, run repeatedly in a loop.

We now regenerate them when installing, which means the path for perl
doesn't get baked in

This means we don't rely on baking a path to gcc into the executable

The main change is that, rather than using "xargs ar" we now put
all the filenames into a file, and do "ar @file". This means that
ar adds all the files at once, which works around a problem where
files with the same basename in a later invocation were overwriting
the existing file in the .a archive.

Accidnetally pushed this patch which, while it validates, isn't
correct.

rolling back:

Fri Mar 19 11:21:27 GMT 2010  Simon Marlow <marlowsd@gmail.com>
  * slight improvement to scavenging of update frames when a collision has occurred

    M ./rts/sm/Scav.c -19 +15

This makes the RTS hooks work when doing dynamic linking

Fix two places where we were doing foldl instead of foldr
after decomposing a Kind.  Strange that the same bug appears
in two quite different places!