[clang] [compiler-rt] [llvm] [SystemZ] Add support for half (fp16) (PR #109164)

[Ulrich Weigand via cfe-commits]

uweigand wrote:

> So this should already work. If it doesn't, you'll have to debug the build process here (e.g. look at preprocessed output to see what's actually going on here).

Ah, sorry, now I see what's going on.  In this line you added to the cmake logic:
```
set(s390x_SOURCES ${GENERIC_SOURCES})
```
you need to add `${GENERIC_TF_SOURCES}` as well, otherwise all the TF files won't get built at all.


https://github.com/llvm/llvm-project/pull/109164