Mar 18, 2015
As many of you saw, GHC 7.10 RC3 is now available. As has become a pretty long-standing tradition, the Stackage project has been tracking GHC 7.10 library support for a few months now. Given how close we are to
a release, now seems like a good time to make a more public status
report.
Firstly: restrictive upper bounds. I added a comment two hours ago listing all of the restrictive
upper bounds, that is, upper bounds on libraries which prevent them
from working with GHC 7.10. (Note: --allow-newer can override that.) In some cases, these are unnecessary upper
bounds, in that simply relaxing the bounds in the cabal file will
allow them to build. In others, they are in fact necessary, and the
code needs to change. To help identify which packages fall into
which categories, I then did a full build without bounds checking.
I've uploaded three different sets of results:
Summary of packages failures, ignoring dependency failures. These are
packages that configured correctly, and then either failed on the
build or test step. The good news is that only 64 packages failed!
Summary of packages failures, including dependency failures. Same as
above, plus packages that failed to configure because one of their
dependencies didn't build. The bad news is that this list has 480
packages.
A tarball containing all of the detailed build logs. I strongly
encourage any authors with a package in the first list list, and
even those with a package in the second list, to download this
tarball and review the logs.
The Haskell community excels in getting libraries to quickly be
compatible with the newest GHC version. Let's strive to do it again
with this release!