Building from src.
Shouldn't INSTALL.md mention - j<n> option for make ?
On Wed, Jan 13, 2016 at 11:43 AM, Ben Gamari
The GHC Team is very pleased to announce the first release candidate of the Glasgow Haskell Compiler 8.0.1 release. Source and binary distributions as well as the newly revised users guide can be found at
http://downloads.haskell.org/~ghc/8.0.1-rc1/
This is the first in a series of release candidates which will allow us to get wider testing of the significant changes that have occurred since the 7.10 series. These include,
* the TypeInType extension, which unifies types and kinds allowing for promotion of more Haskell constructs to the type-level
* the introduction of type application in source programs
* support for recursive superclass relationships
* support for Applicative do notation
* introduction of the DuplicateRecordFields language extension
* a rewritten and substantially more thorough pattern match checker
* the introduction of injective type classes
* introduction of the Strict and StrictData language extensions, allowing modules to be compiled with strict-by-default evaluation of bindings
* the ability to run the GHCi interpreter in a separate process, allowing a callstacks in GHCi, easier integration with tooling, and more
and much more.
Changes of this magnitude will invariably bring bugs. This release candidate in particular is known to suffer from a few significant issues which are being actively worked upon,
* The new -XInjectiveTypeFamilies language extension will likely be renamed to -XTypeFamilyDependencies
* #11120: Type representations are missing for some types and promoted constructors
* #11334: Solving for Typeable (Proxy :: Proxy 'Compose) fails
* #11276: Pattern checker performance can degrade significantly in presence of pattern matches with guards
* #11405: Type-level skolem-escape check fails incorrectly
* #11414: Use of -XStrict results in compiler abort
* #11379: Instance solver fails to terminate
* #11419: Haddock documentation is currently not included in the binary distributions (and hence is missing on downloads.haskell.org)
* #11370: -Wredundant-constraints being included in -Wall breaks the three-release compatibility policy
In the coming weeks we will continue to iterate on these issues. We will also look at Trac tickets marked with "highest" priority on the release status page [2].
If you have a ticket that you would like to see addressed that does not meet one of these criteria, please bring this to our attention. Likewise, if you encounter an issue please open a ticket if one does not already exist.
Also note that we currently cannot offer 32-bit Windows builds due to breaking changing in a recent Windows 10 upgrade. We'll work to resolve this before the 8.0 release but please let us know if this poses a significant problem for you.
Cheers,
- Ben
[1] https://cygwin.com/ml/cygwin/2015-12/msg00003.htm [2] https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-8.0.1
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