[U-Boot] [PATCH] mkimage: Fix generating multi and script images again

[Marek Vasut]

On Monday, December 07, 2015 at 06:18:02 PM, Philippe De Swert wrote:
> Hi,
> 
> I haven't had time to check the previous report yet.
> 
> On 07/12/15 19:01, Marek Vasut wrote:
> > Seems 6ae6e160 broke creating multi and script type images and even
> > building of mkimage itself. There are two problems with that patch.
> > 
> > First is that expression (!(x == 0) || !(x == 1)) is always true for
> > unsigned int x. The expression must use AND (&&) not OR (||) to be
> > correct.
> 
> It is either multi or script, so AND does not sound correct. The code
> should skip the following bit if either of those
> flags is detected. I admit I threw in the script bit as an afterthought
> and things went wrong there.
> 
> Correct would be if( !(params.type == IH_TYPE_MULTI || params.type ==
> IH_TYPE_SCRIPT))
> 
> I'll double-check stuff and submit a new patch

So yeah, !(X or Y) <=> (!X and !Y) . The patch does that. See
https://en.wikipedia.org/wiki/De_Morgan%27s_laws

> > Second is the coding which causes gcc 4.9.x and newer scream gruesome
> > death and murder. The expression !x == 0 && !x == 1 is ambiguous and
> > should instead be rewritten into (x != 0) && (x != 1) to be correct.
> > The parenthesis are added for clarity.
> 
> Weirdly enough I have gcc 4.9.2 and it did not even beep, so I don't
> know how it could have broken the build.
> Give me some time to submit a corrective patch later tonight.

This patch should fix things.

Best regards,
Marek Vasut