[libc-commits] [libc] [libc] Fix float.h header to include the system float.h first and add more definitions. (PR #78857)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 approved this pull request.

I suppose it will be obvious if the compiler doesn't define `__xyz__` versions of these. However I'm assuming it's somewhat common for the compilers to use these names. Thanks.

https://github.com/llvm/llvm-project/pull/78857