[U-Boot] [Reproducible-builds] Reproducible U-Boot build support, using SOURCE_DATE_EPOCH

[Paul Kocialkowski <contact@paulk.fr>]

Le mercredi 30 septembre 2015 ? 08:50 -0700, Vagrant Cascadian a ?crit :
> On 2015-09-28, Paul Kocialkowski wrote:
> > What do you think? Please let me know if I'm wrong.
> 
> This patch on top of 2015.10-rc4 seems to resolve the issue for me:
> 
> Index: u-boot/tools/default_image.c
> ===================================================================
> --- u-boot.orig/tools/default_image.c
> +++ u-boot/tools/default_image.c
> @@ -108,8 +108,6 @@ static void image_set_header(void *ptr,
>  			fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
>  				__func__);
>  			time = 0;
> -		} else {
> -			time = mktime(time_universal);
>  		}
>  	} else {
>  		time = sbuf->st_mtime;
> 
> 
> It still checks for the validity of SOURCE_DATE_EPOCH using gmtime, but
> doesn't call mktime at all, just re-uses the value set from
> SOURCE_DATE_EPOCH.

That's a good plan! I guess we should also fully get rid of the
time_universal variable and make the check inline:

if (gmtime(&time) == NULL)

and of course drop the else statement.

Would you like to craft that patch for upstream U-Boot?
If not, I'd be happy to do it.

Thanks for your work!

-- 
Paul Kocialkowski, Replicant developer

Replicant is a fully free Android distribution running on several
devices, a free software mobile operating system putting the emphasis on
freedom and privacy/security.

Website: https://www.replicant.us/
Blog: https://blog.replicant.us/
Wiki/tracker/forums: https://redmine.replicant.us/

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