gcc warns for memmove (0, b, 0)

[Andrew Haley]

On 16/11/16 11:45, Prathamesh Kulkarni wrote:
> I am not sure though how to interpret this in context of above example.

This is for GCC help, not general help with C.

However,

ISO/IEC 9899:2011

7.24.1 String function conventions

Where an argument declared as size_t n specifies the length of the
array for a function, n can have the value zero on a call to that
function. Unless explicitly stated otherwise in the description of a
particular function in this subclause, pointer arguments on such a
call shall still have valid values, as described in 7.1.4.