On 14/01/16 15:02, Andre Vieira (lists) wrote:
Unfortunately c99_functions is a very wide net. For instance, newlib supports the ceill, but doesn't support wscanf_s nor any bounds checking function I think.
wscanf_s is not c99 (it is in the optional annex k of c11, which is likely to be removed from the standard)
I extracted all function names from the C99 standard and did a quick nm and grep to look into whether newlib defined these for arm-none-eabi. The functions I found missing fall into the following sections: - Complex Arithmetic (which fall under the function_c99_math_complex class)
that's ok to skip (complex become optional in c11)
- floating-point environment - Functions for greatest-width integer types
these are not ok to skip from c99
- atomics (missing atomic_is_lock_free and atomic_fetch_key) - Bounds-checking interfaces
these are optional c11 features
I don't quite know how to proceed. I suspect a new function class for C99 math functions (excluding complex) would help here and probably more places too. Though, I don't know how much work it would be to split function_c99_misc in that manner. Opinions welcome!!
i think newlib should implement the missing c99 apis otherwise don't expect any c99 optimizations (and should be considered broken with -std=c99 or higher)
