u-boot-initial-env: rework make target
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@toradex.com>
Acked-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/Makefile b/tools/Makefile
index 26be0a7..80bc62b 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -275,6 +275,10 @@
always := $(hostprogs-y)
+# Host tool to dump the currently configured default environment,
+# build it on demand, i.e. not add it to 'always'.
+hostprogs-y += printinitialenv
+
# Generated LCD/video logo
LOGO_H = $(objtree)/include/bmp_logo.h
LOGO_DATA_H = $(objtree)/include/bmp_logo_data.h