Hi,
On Thursday, July 26, 2012, Aneesh V wrote:
Hi Tyler,
On 07/26/2012 11:54 AM, Tyler Olmstead wrote:
Hi Christian,
On Thu, Jul 26, 2012 at 10:03 AM, Christian Riesch christian.riesch@omicron.at wrote:
[cc'd Prabhakar Lad, Tom Rini, and Scott Wood]
Tyler,
On Thu, Jul 26, 2012 at 5:37 PM, Tyler Olmstead tyler.j.olmstead@gmail.com wrote:
Hi all,
I have encountered some issues adding a board-specific command to the board file of a project I have been working on. Specifically, after adding a U-Boot shell command to my board file, I have been seeing link-stage failures when attempting to build SPL.
It's hard to tell without having your code, but I think this problem was already discussed in [1]. However I do not remember how Prabhakar solved it in the end.
Yes, I ran into this thread while debugging the problem, which ultimately lead me to my solution. From that same thread [1], Wolfgang Denk writes:
<quote>
*I want to add a command using U_BOOT_CMD in uboot, where SPL_BUILD is enabled for example for da850evm in spl frame work how can i do that *
This makes no sense. Commands can only be executed when we have full U-Boot running (actually even only after relocation). You cannot run commands in the SPL.
</quote>
I understand of course why it makes no sense to have command support in the SPL. However, the crux of this problem is that U-Boot and SPL both link in the same board object file, so in that sense compile-time switches wont work. From later in [1], Scott Wood writes:
No that's not correct. For SPL we build the object files into a different directory "spl/". Please see the below in spl/Makefile
# We want the final binaries in this directory obj := $(OBJTREE)/spl/
Object files used for U-Boot and SPL are not the same. You can use compile-time switches and it should work just fine.
Thanks for pointing that out, Aneesh.
Therefore an #ifndef CONFIG_SPL_BUILD would work for Tyler's problem and I think that it's also easier to read than some build magic that removes u-boot commands.
Christian
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