Re: tf-random id weirdness

["Edward Z. Yang" <ezyang@cs.stanford.edu>]

OK, well, you can still get the ABI of a package in all cases
(it's just not in the ID anymore.)  Something like:

ezyang@sabre:~$ ghc-pkg field base-4.9.0.0 abi
abi: 5e731f0a06895b09ada57a6853a117b3

Also if you have an IPID use the --ipid flag:

ezyang@sabre:~$ ghc-pkg field --ipid shake-0.15.5-Clzm3aWl4tlKQLUDAtY3Kz abi
abi: ab9703b6467df480a09bd2985f85d97c

Hope that helps.

Edward

Excerpts from Joachim Breitner's message of 2016-07-09 09:35:46 -0400:
> Hi,
> 
> Am Freitag, den 08.07.2016, 17:06 -0400 schrieb Edward Z. Yang:
> > The "official" reason they don't have hashes is because,
> > as bundled libraries, they have special status and are thus deified
> > to not have hashes.  (If these IDs are opaque it shouldn't matter,
> > right?!)
> 
> well, they might be opaque, but it would be really good if they would
> differ if the ABI differs. So if we change the source code (bugfix,
> different flags etc.), we really really want to see a different hash,
> in order to detect what other packages need to be rebuilt. Basically
> our whole infrastructure relies on these hashes to identify ABIs.
> 
> Greetings,
> Joachim
>