[flang-commits] [flang] [llvm] [flang] Use backend fp128 support to determine REAL(16) availability (PR #221907)

[Michael Kruse via flang-commits]

Meinersbur wrote:

Consider creating `libflang_rt.quadmath.a` unconditionally. For a bit more descriptive message unstead of "undefined symbol", it is possible the make the linker emit an error if one of its symbols is used.

glibc solution:
https://github.com/bminor/glibc/blob/04e750e75b73957cf1c791535a3f4319534a52fc/include/libc-symbols.h#L229-L233

Linux solution:
https://github.com/torvalds/linux/blob/6ae8d04871f84d853673e9e9f3f713e77a2fe145/include/linux/bug.h#L52-L53


https://github.com/llvm/llvm-project/pull/221907