The exported sub_make_done variable leaks into the environment of all
child processes. When make targets like tcheck spawn independent
make-invocations with O=, those child-makes inherit sub_make_done=1,
skip the KBUILD_OUTPUT setup and try to build in the source tree.

A global 'unexport sub_make_done' cannot be used because the build
system itself re-invokes the top-level Makefile for syncconfig (via
'$(MAKE) -f $(srctree)/Makefile syncconfig'). Without sub_make_done,
that child make re-enters the KBUILD_OUTPUT block and recomputes
abs_objtree. With a relative O= path this resolves to a nested
directory (e.g. build/build/) where .config does not exist.

Instead, use 'env -u sub_make_done' in the test-target recipes so only
the test scripts see a clean environment. This allows their child make
invocations to process O= correctly without affecting internal kbuild
recursion.

This is not strictly a bugfix, but compare with:

commit 27529f1cb02d ("kbuild: skip parsing pre sub-make code for recursion")

Signed-off-by: Simon Glass <sjg@chromium.org>

On Xilinx MB-V there is a need to use ELF file for SPL which is placed
in BRAM (Block RAM) because tools for placing code to bitstream requires to
use ELF. That's why introduce SPL_REMAKE_ELF similar to REMAKE_ELF option
as was originally done by commit f4dc714aaa2d ("arm64: Turn u-boot.bin back
into an ELF file after relocate-rela").

There is already generic and simple linker script (arch/u-boot-elf.lds)
which can be also used without any modification.

Signed-off-by: Michal Simek <michal.simek@amd.com>

Convert a duplicate dtbs recipe into a dependency in the main Makefile.

Another recipe is already defined on line 2369, so we are getting
spurious warnings like:

    Makefile:2369: warning: overriding recipe for target 'dtbs'
    Makefile:1425: warning: ignoring old recipe for target 'dtbs'

The removed recipe was a no-op anyway so can be safely removed.

Signed-off-by: David Lechner <dlechner@baylibre.com>

Prepare v2026.04-rc4

Signed-off-by: Tom Rini <trini@konsulko.com>

This unfortunately introduces failure to build in other cases:
$ make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- O=build \
	microchip_mpfs_generic_defconfig
  GEN     Makefile
#
# configuration written to .config
#
$ make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- O=build
  HOSTCC  scripts/basic/fixdep
  GEN     Makefile
  HOSTCC  scripts/kconfig/conf.o
  YACC    scripts/kconfig/zconf.tab.[ch]
  LEX     scripts/kconfig/zconf.lex.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
scripts/kconfig/conf  --syncconfig Kconfig
***
*** Configuration file ".config" not found!
***
*** Please run some configurator (e.g. "make oldconfig" or
*** "make menuconfig" or "make xconfig").
***
make[4]: *** [/stuff/u-boot/scripts/kconfig/Makefile:75: syncconfig] Error 1
make[3]: *** [/stuff/u-boot/Makefile:702: syncconfig] Error 2
make[2]: *** [../Makefile:189: __sub-make] Error 2
make[1]: *** No rule to make target 'include/config/auto.conf', needed by 'include/config/uboot.release'.  Stop.
make: *** [Makefile:189: __sub-make] Error 2

This reverts commit 4284306d22c5b6d64ecd62b462551d9d313c8104.

Reported-by: Conor Dooley <conor@kernel.org>
Signed-off-by: Tom Rini <trini@konsulko.com>

The exported sub_make_done variable leaks into the environment of all
child processes. When make targets like tcheck spawn independent make
invocations with O=, those child makes inherit sub_make_done=1, skip
the KBUILD_OUTPUT setup and try to build in the source tree.

There is a workaround that resets sub_make_done to 0 for specific test
targets, but this isn't great since it has tolist every target that
spawns independent make invocations.

Instead, unexport sub_make_done once we are in the final make
invocation. The direct sub-make already has the value in its
environment from the export, and no further propagation is needed.
This also allows the per-target workaround to be removed.

Fixes: 27529f1cb02d ("kbuild: skip parsing pre sub-make code for recursion")
Signed-off-by: Simon Glass <simon.glass@canonical.com>

Prepare v2026.04-rc3

Signed-off-by: Tom Rini <trini@konsulko.com>

This series from Vagrant Cascadian <vagrant@debian.org> provides a
way for plain text environments to avoid having extraneous quotes in how
they use CONFIG_DEFAULT_FDT_FILE.

Link: https://lore.kernel.org/r/20260130040424.472735-1-vagrant@debian.org