[PATCH v4 1/1] u-boot-initial-env: rework make target

[Pali Rohár]

On Wednesday 23 November 2022 13:18:40 Tom Rini wrote:
> On Tue, Nov 08, 2022 at 09:52:22AM +0100, Max Krummenacher wrote:
> 
> > From: Max Krummenacher <max.krummenacher at toradex.com>
> > 
> > With LTO enabled the U-Boot initial environment is no longer stored
> > in an easy accessible section in env/common.o. I.e. the section name
> > changes from build to build, its content maybe compressed and it is
> > annotated with additional data.
> > 
> > Drop trying to read the initial env with elf tools from the compiler
> > specific object file in favour of adding and using a host tool with
> > the only functionality of printing the initial env to stdout.
> > 
> > See also:
> > https://lore.kernel.org/all/927b122e-1f62-e790-f5ca-30bae4332c77@foss.st.com/
> > 
> > Signed-off-by: Max Krummenacher <max.krummenacher at toradex.com>
> > Acked-by: Pali Rohár <pali at kernel.org>
> 
> Alright, so 'make tools-only_defconfig tools-only' now fails to build
> because we're missing the dependencies to make sure that we have
> generated/environment.h available.
> https://source.denx.de/u-boot/u-boot/-/jobs/532186

We cannot generate generated/environment.h in tools-only mode without
real board because environment is always board dependent.

Therefore that new env tool has to be compiled only when doing full real
board build, not just tools-only build.

So I would suggest to extend Makefile put that new tool under some "if"
to exclude compilation in tools-only mode.