Hi Albert, On Fri, Jul 19, 2013 at 12:12 PM, Albert ARIBAUD <albert.u.b...@aribaud.net>wrote:
> Hi Simon, > > On Fri, 19 Jul 2013 10:53:33 -0600, Simon Glass <s...@chromium.org> > wrote: > > > Hi, > > > > On Fri, Jul 19, 2013 at 9:27 AM, Sascha Silbe <t-ub...@infra-silbe.de > >wrote: > > > > > Albert ARIBAUD <albert.u.b...@aribaud.net> writes: > > > > > > > Although, with recent proposals like the TPL one: > > > > > > > > http://permalink.gmane.org/gmane.comp.boot-loaders.u-boot/164432 > > > > > > > > ... I am toying with the idea of a more generic build mechanism which > > > > would allow a target to specify as many binaries as it needs, each > with > > > > its own configuration. > > > > > > FWIW, I like the idea. Apart from streamlining the current code, it > > > would allow building custom chains of bootloaders. One thing I could > use > > > for development would be a minimal stage that can load one of two > > > "normal" / full-blown U-Boot versions, similar to dual BIOS support on > > > modern x86 PCs. All devices I work with can be un-bricked reasonably > > > easily, but for most of them it either requires manual interaction > > > (e.g. the push-button for UART boot on CuBox) or prevents "normal" > boots > > > (e.g. removing the SD card on Wandboard so that it boots via USB > > > _instead_ of from SD card). > > > > > > In addition, it would allow customising SPL features without having to > > > introduce more special code. > > > > > > > We actually use something like this in Chrome OS. Right now we are > working > > on a 'small' U-Boot which is not SPL but has no commands (they are > compiled > > out by a CONFIG option which I will post one day). This will involve two > > complete runs of the U-Boot Makefile - one to create each version of > > U-Boot. It would be great if this could be handled automatically in the > > same build. > > My idea is that any 'component' needed in at least one 'binary' would > be compiled once, and then linked as many times as there would be > binaries needing it, all in one single makefile invocation. > That would be excellent! Regards, Simon
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