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

Serie-cc: Marek Behún marek.behun@nic.cz Serie-cc: sjg Signed-off-by: Patrick Delaunay patrick.delaunay@foss.st.com ---

Makefile | 2 +- scripts/Makefile.spl | 2 +- scripts/gen_ll_addressable_symbols.sh | 5 ++++- 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile index ca2432c8ce..140dea09f4 100644 --- a/Makefile +++ b/Makefile @@ -1736,7 +1736,7 @@ u-boot-keep-syms-lto_c := $(patsubst %.o,%.c,$(u-boot-keep-syms-lto))

quiet_cmd_keep_syms_lto = KSL $@ cmd_keep_syms_lto = \ - NM=$(NM) $(srctree)/scripts/gen_ll_addressable_symbols.sh $^ >$@ + $(srctree)/scripts/gen_ll_addressable_symbols.sh $(NM) $^ > $@

quiet_cmd_keep_syms_lto_cc = KSLCC $@ cmd_keep_syms_lto_cc = \ diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index 5be1a9ba1b..25a3e7fa52 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -459,7 +459,7 @@ u-boot-spl-keep-syms-lto_c := \

quiet_cmd_keep_syms_lto = KSL $@ cmd_keep_syms_lto = \ - NM=$(NM) $(srctree)/scripts/gen_ll_addressable_symbols.sh $^ >$@ + $(srctree)/scripts/gen_ll_addressable_symbols.sh $(NM) $^ > $@

quiet_cmd_keep_syms_lto_cc = KSLCC $@ cmd_keep_syms_lto_cc = \ diff --git a/scripts/gen_ll_addressable_symbols.sh b/scripts/gen_ll_addressable_symbols.sh index 3978a39d97..b8840dd011 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);/'