Bug#756260: ghc generates lots of unaligned access syslog warnings on hppa

[John David Anglin]

This is caused by the following issue:
https://mail.haskell.org/pipermail/ghc-commits/2015-January/010495.html

Like ia64, hppa has function descriptors.  A function pointer has the plabel bit (bit 30)
set in the function pointer.  A function pointer pointing to an integer data object is off by + 2,
causing the unaligned warnings.

I found this debugging debugging the test failure in the haskell-text-icu package.  Eventually,
I found that the address used for sm_mutex was off by two.

Misaligned mutex addresses break the thread support.  This caused various random failures
building many haskell packages.

Attached is a back port the ghc-7.10 patch.  Please apply in next 7.8 ghc update.

Thanks,
Dave
--
John David Anglin	dave.anglin at bell.net


-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: ghc-7.10-closure.patch.txt
URL: <http://lists.alioth.debian.org/pipermail/pkg-haskell-maintainers/attachments/20150726/d0df681e/attachment-0001.txt>