On 10/13/2016 01:03 AM, fedor_qd@xxxxxxx wrote:
Are GCC builtin function sscanf, strtod and atof independent from libc provided by os?
Always yours, Fiodar Stryzniou
They are largely independent -- though GCC has knowledge of the
requirements imposed by POSIX and assumes those requirements except in a
freestanding implementation.
GCC sometimes has small amounts of knowledge of the implementation. For
example, it knows about how the implmementation handles certain
formatting which vary across implemetations (%p for example). That
knowledge is used to give more precise buffer overflow warnings and can
be used to optimize return values from certain *printf calls.
Jeff
