[m-rev.] diff: upgrade to gc6.2alpha4

[Peter Ross]

Hi,

The update is now complete.  There were no significant merging issues,
only repository issues, in the merge.  The diff is quite large and can
be seen at ~petdr/zzreview.gc62 if anyone is interested.

===================================================================


Estimated hours taken: 5
Branches: main

boehm_gc/*:
    Merge in version gc6.2alpha4 of the collector as this provides
    support for threads on MacOS X machines.

--------------------------------------------------------------------------
mercury-reviews mailing list
post:  mercury-reviews at cs.mu.oz.au
administrative address: owner-mercury-reviews at cs.mu.oz.au
unsubscribe: Address: mercury-reviews-request at cs.mu.oz.au Message: unsubscribe
subscribe:   Address: mercury-reviews-request at cs.mu.oz.au Message: subscribe
--------------------------------------------------------------------------