The GHC team is very pleased to announce the availability of GHC
8.10.7. Source and binary distributions are available at the usual
This is a small bugfix release, fixing one linking portability
issue (#19950) present in GHC 8.10.5 and GHC 8.10.6 on some x86_64
macOS toolchains, which resulted in undefined symbol errors for
Issue #19950 is caused by a bug in newer Apple toolchains (specifically
XCode 12) where programs compiled with affected versions of XCode are
not backwards compatible with configurations running older version of
XCode (certain versions of XCode 11).
We claimed to have fixed this in GHC 8.10.6, but alas this wasn’t the
case. The fix was originally tested on the master branch, which uses a
different build configuration from the 8.10 branch. We have now tested
the fix on the GHC 8.10 branch and finally squashed the bug.
We would like to thank Microsoft Research, GitHub, IOHK, the Zw3rk
stake pool, Tweag I/O, Serokell, Equinix, SimSpace, and other anonymous
contributors whose on-going financial and in-kind support has
facilitated GHC maintenance and release management over the years. We
would also like to thank the hundreds of open-source contributors whose
work makes GHC possible.
A complete list of bug fixes and
improvements can be found in the release