- always build against llvm9, also on SLE15 (suse_version == 1500)
otherwise the resulting build is not working (llvm is 7.x there) (bsc#1181571)

- update to 8.10.4
* Fix a crash caused by inappropriate garbage of heap-allocated data
reachable from foreign exports

- update to 8.10.3
* More robust support for architectures with weak memory ordering
guarantees (e.g. modern ARM hardware).
* GHC can now split dynamic objects to accomodate macOS' RPATH size
limitation when building large projects (#14444)
* Several correctness bugs in the new low-latency garbage collector
* Many, many other bug-fixes))

- disable %{ix86} build

- force multiversion for subpackages

- add --enable-unregistered to configure phase on unregistered
architectures

- update to 8.10.2
* Fixes a code generation bug resulting in incorrect code generation
for foreign calls with complex arguments
* Fixes a bug causing object merging to fail when the lld linker is in use
* Introduces a workaround for a Linux kernel bug in the implementation
of the timerfd mechanism