[clang] [clang-tools-extra] [llvm] [clang][headers] Need a way for math.h to share the definitions of INIFINITY and NAN with float.h (PR #164348)

[Ian Anderson via llvm-commits]

ian-twilightcoder wrote:

> ⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

I left the formatting alone on the existing declarations, but I can make the formatter happy here if that's the right thing to do.

https://github.com/llvm/llvm-project/pull/164348