build: remove the variable NM in gen_ll_addressable_symbols.sh
With LTO activated, the buildman tools failed with an error on my
configuration (Ubuntu 20.04, stm32mp15_trusted_defconfig) with the error:
../arm-linux-gnueabi/bin/nm:
scripts/gen_ll_addressable_symbols.sh: file format not recognized
It seems the shell variable initialization NM=$(NM) is not correctly
interpreted when shell is started in the Makefile, but I have not this
issue when I compile the same target without buildman.
I don't found the root reason of the problem but I solve it by
providing $(NM) as script parameter instead using a shell variable.
The command executed is identical:
cmd_keep-syms-lto.c := NM=arm-none-linux-gnueabihf-gcc-nm \
u-boot/scripts/gen_ll_addressable_symbols.sh arch/arm/cpu/built-in.o \
.... net/built-in.o >keep-syms-lto.c
cmd_keep-syms-lto.c := u-boot/scripts/gen_ll_addressable_symbols.sh \
arm-none-linux-gnueabihf-gcc-nm arch/arm/cpu/built-in.o \
... net/built-in.o > keep-syms-lto.c
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/scripts/gen_ll_addressable_symbols.sh b/scripts/gen_ll_addressable_symbols.sh
index 3978a39..b8840dd 100755
--- a/scripts/gen_ll_addressable_symbols.sh
+++ b/scripts/gen_ll_addressable_symbols.sh
@@ -5,8 +5,11 @@
# Generate __ADDRESSABLE(symbol) for every linker list entry symbol, so that LTO
# does not optimize these symbols away
+# The expected parameter of this script is the command requested to have
+# the U-Boot symbols to parse, for example: $(NM) $(u-boot-main)
+
set -e
echo '#include <common.h>'
-$NM "$@" 2>/dev/null | grep -oe '_u_boot_list_2_[a-zA-Z0-9_]*_2_[a-zA-Z0-9_]*' | \
+$@ 2>/dev/null | grep -oe '_u_boot_list_2_[a-zA-Z0-9_]*_2_[a-zA-Z0-9_]*' | \
sort -u | sed -e 's/^\(.*\)/extern char \1[];\n__ADDRESSABLE(\1);/'