[U-Boot] [PATCH] Makefile: fix dependency for imx targets

[Tom Rini]

On Fri, Oct 25, 2019 at 02:46:54PM +0200, Heiko Schocher wrote:

> imx targets are defined in arch/arm/mach-imx/Makefile.
> Some of them are dependent on targets defined in main
> Makefile. For the Makefile in arch/arm/mach-imx this
> targets must be finished before the imx targets are
> build, if not you get for example the error:
> 
> make -f /home/hs/abb/mainlining/u-boot/scripts/Makefile.build obj=arch/arm/mach-imx u-boot-dtb.imx
> make[2]: *** No rule to make target 'u-boot-fit-dtb.bin', needed by 'u-boot-dtb.imx'.  Stop.
> make[1]: *** [/home/hs/abb/mainlining/u-boot/Makefile:1123: u-boot-dtb.imx] Error 2
> make[1]: *** Waiting for unfinished jobs....
> make[1]: Leaving directory '/work/hs/compile/u-boot/aristainetos2_defconfig'
> make: *** [Makefile:148: sub-make] Error 2
> compile failed
> 
> In above case of CONFIG_MULTI_DTB_FIT is defined, the
> u-boot-dtb.imx is dependent on the u-boot-fit-dtb.bin
> which may is not build yet ...
> 
> I could reproduce this error on a travis build also if
> I build an out-of-tree build on a local machine with a
> build directory on a "slow" slow storage device. If
> building the same source target with a build dir on a
> fast storage device, the build works.
> 
> I found no solution to tell the arch/arm/mach-imx/Makefile
> to find the targets in main Makefile, if there is a way
> this would be the better fix.
> 
> I solved it by adding a IMX_DEPS var, which holds a list
> of main u-boot targets, which must be finished, before
> calling imx targets and fixed the build for imx
> targets which enabled CONFIG_MULTI_DTB_FIT.
> 
> I think it is just luck, that imx targets with
> CONFIG_OF_SEPARATE enabled build, because the
> u-boot-dtb.imx target depends on u-boot-dtb.bin
> which gets build early enough before starting with
> u-boot-dtb.imx. May this targets should be fixed too.
> 
> Signed-off-by: Heiko Schocher <hs at denx.de>

Reviewed-by: Tom Rini <trini at konsulko.com>

Good work figuring this out!  I'll pick it up directly soon as I know it
was blocking other stuff.

-- 
Tom
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