No portable way to detect string-to-float conversion errors in standard C

sebsite oh, apparently it's not possible to portably check for string-to-float conversion errors in standard c 2026-10-09 this is kinda a sequel-ish to my previous post, in which i go over the math_errhandling macro, and how math error handling is done in glibc and musl (as well as how it's specified in the standard). to summarize: math_errhandling is a macro which indicates which error-handling mechanisms are supported by math.h functions: errno (MATH_ERRNO) and/or floating-point exceptions (MA