Extended Description

Hello.

-Wpadded warns about two issues, padding a struct field and padding at the end (i.e: the whole struct). See the example:

struct Bidule
{
	char b;
	int a;
	char c;
};

test.cpp:4:6: warning: padding struct 'Bidule' with 3 bytes to align 'a' [-Wpadded]
        int a;
            ^
test.cpp:1:8: warning: padding size of 'Bidule' with 3 bytes to alignment boundary [-Wpadded]
struct Bidule

Usually padding in the middle is a bad thing because the struct can be "easily" organized differently to reduce the memory footprint. On the other hand, padding at the end of a structure is common and there is usually no trivial fix.

As an example, I ran -Wpadded on a large code base, I found 3 padding of field which I fixed, and more than one thousand warning messages about padding of struct for which I cannot do something without complex code refactoring.

It may be possible to split -Wpadding in two options, one which warns about padding fields (which I found really useful 100% of the time) and the other which warns about padding the whole struct, which IMHO only need to be activated when needed.

Thank you.