From: Max Krummenacher max.krummenacher@toradex.com
With CONFIG_LTO enabled the current way of extracting the configured environment no longer works, i.e. the object file content changes due to LTO.
Build a host tool which prints the configured environment instead of using objcopy and friends to achive the same.
The code and Makefile changes were mostly stolen from tools/env/ i.e. the target userspace tools to access the environment.
Changes in v5: - don't build the printinitialenv tool unconditionally but build it only as part of the u-boot-initial-env target. This no longer fails the 'make tools-only_defconfig tools-only' use-case which is reported by Tom Rini. Adding the $(env_h) dependencies to the tools target might give circular dependencies issues with some future tool. - add Acked-by: Pali Rohár pali@kernel.org
Changes in v4: - add '(objtree)/' when calling the tool. Suggested by Pali Rohár. - renamed patch, as more than just the Makefile has changes
Changes in v3: - moved the tool from scripts/ to tools/. Suggested by Tom Rini - changed the dependencies to '$(env_h)' and 'tools'. Suggested by Tom Rini and Pali Rohár. - removed the sed rule which replaces \x00 with \x0A as this is already done by the tool. Suggested by Pali Rohár.
Changes in v2: - reworked to build a host tool which prints the configured environment as proposed by Pali Rohár https://lore.kernel.org/u-boot/20221018174827.1393211-1-max.oss.09@gmail.com... - renamed patch, v1 used "Makefile: fix u-boot-initial-env target if lto is enabled"
Max Krummenacher (1): u-boot-initial-env: rework make target
Makefile | 10 ++++++---- tools/.gitignore | 1 + tools/Makefile | 4 ++++ tools/printinitialenv.c | 44 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 55 insertions(+), 4 deletions(-) create mode 100644 tools/printinitialenv.c