[compiler-rt] [builtins] Fix divtc3.c etc. compilation on Solaris/SPARC with gcc (PR #101662)

[Alexander Richardson via llvm-commits]

arichardson wrote:

If you can just call the `long double` libc versions, then it does sound like using 
`#if defined(CRT_HAS_TF_MODE) || defined(CRT_LDBL_128BIT)` as the guard would work.

This would be equivalent to `#if defined(CRT_HAS_F128) && (defined(CRT_HAS_128BIT) || defined(CRT_LDBL_128BIT))` but is IMO easier to understand.


https://github.com/llvm/llvm-project/pull/101662