[llvm] [llvm-profdata] Enabled functionality to write split-layout profile (PR #101795)

[Rainer Orth via llvm-commits]

rorth wrote:

You do, actually: the GCC Compile Farm contains a Solaris/sparcv9 system perfectly equipped to build and test LLVM.

That said, I've done some investigation myself: even in exactly the same configuration as the buildbot (`clang-17` as host compiler, both 1-stage and 2-stage builds) I couldn't reproduce the failures.  I have to conclude that it's somehow related to the fact that the bot is doing incremental builds most of the time, while my builds were always from scratch.

I've now switched the bot to use `clang-19` (19.1.0-rc3) as host compiler and after a fresh build with that one, the failure is gone.  Very strange.

https://github.com/llvm/llvm-project/pull/101795