The GHC team is very pleased to announce the availability of GHC 9.6.1-alpha3.
As usual, binaries and source distributions are available at
downloads.haskell.org.
Beginning with GHC 9.6.1, GHC can be built as a cross-compiler to
WebAssembly and JavaScript. This is an important step towards robust
support for compiling Haskell to the Web, but there are a few caveats to be
aware of in the 9.6 series:
-
Both the Javascript and WebAssembly backends are still at an early
stage of development and are present in this release as a technology preview -
Using GHC as a cross-compiler is not as easy as we would like it to
be; in particular, there are challenges related to Template Haskell -
GHC is not yet run-time retargetable; a given GHC binary targets
exactly one platform, and both WebAssembly and JavaScript are considered
platforms for this purpose. Cross-compilers must be built from source by
their users
We hope to lift all of these limitations in future releases.
Additionally, 9.6.1 will include:
-
Significant latency improvements in the non-moving garbage collector
-
Efficient runtime support for delimited continuations
-
Improvements in compiler error messages
-
Numerous improvements in the compiler’s memory usage
See the release notes for a comprehensive accounting of changes in this
release.
As always, one can find a migration guide to aid in transitioning from older
releases on the GHC Wiki. We have also recently started
extending our release process to cover a wider set of Linux distributions. In
particular, we now offer Rocky 8 and Ubuntu 20.04 binary distributions which
cover RedHat-derivative and distributions using older glibc releases (namely
2.27), respectively.
Please do give this release a try and open a ticket if you see anything
amiss.
Cheers,
~ Ben