[clang] [llvm] Singleton hack of fixing static initialisation order ficaso (PR #154541)

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Dalmurii wrote:

> > @mtrofin I have tried writing an explanation by editing the PR's first comment. Could you verify if this would explain enough or is it not enough for some reason?
> 
> This helps! Some nits: if you look at other PRs in our repo, we don't do much formatting, i.e. no need for lots of headers and all that. If I may: you could, for example, summarize all of it as `Indirect linking of llvm as a shared library is causing a "free() invalid size abortion". In my case, my project depends on google/clspv which in turn pulls llvm. Note that the issue does not occur when clspv is statically linked`. <- I'm assuming that is the library you're talking about in `When library is all statically linked, this problem did not occur.`
> 
> I'd also use this context in the referenced issue (so it can be stand-alone readable)

I would add brief section and write you've written for me. My appreciation for great suggestion.

https://github.com/llvm/llvm-project/pull/154541