History log of /u-boot/scripts/gen_ll_addressable_symbols.sh
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# 61143f74 01-Jun-2022 Marek Behún <kabel@kernel.org>

treewide: Fix Marek's name and change my e-mail address

Fix diacritics in some instances of my name and change my e-mail address
to kabel@kernel.org.

Add corresponding .mailmap entries.

Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

# ff7852d5 21-Jul-2021 Patrick Delaunay <patrick.delaunay@foss.st.com>

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>

# c1094987 20-May-2021 Marek Behún <kabel@kernel.org>

build: support building with Link Time Optimizations

Add plumbing for building U-Boot with Link Time Optimizations.

When building with LTO, $(PLATFORM_LIBS) has to be in --whole-archive /
--no-whole-archive group, otherwise some functions declared in assembly
may not be resolved and linking may fail.

Note: clang may throw away linker list symbols it thinks are unused when
compiling with LTO. To force these symbols to be included, we refer to
them via the __ADDRESSABLE macro in a C file generated from compiled
built-in.o files before linking.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>

# ff7852d5 21-Jul-2021 Patrick Delaunay <patrick.delaunay@foss.st.com>

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>

# c1094987 20-May-2021 Marek Behún <marek.behun@nic.cz>

build: support building with Link Time Optimizations

Add plumbing for building U-Boot with Link Time Optimizations.

When building with LTO, $(PLATFORM_LIBS) has to be in --whole-archive /
--no-whole-archive group, otherwise some functions declared in assembly
may not be resolved and linking may fail.

Note: clang may throw away linker list symbols it thinks are unused when
compiling with LTO. To force these symbols to be included, we refer to
them via the __ADDRESSABLE macro in a C file generated from compiled
built-in.o files before linking.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>

# c1094987 20-May-2021 Marek Behún <marek.behun@nic.cz>

build: support building with Link Time Optimizations

Add plumbing for building U-Boot with Link Time Optimizations.

When building with LTO, $(PLATFORM_LIBS) has to be in --whole-archive /
--no-whole-archive group, otherwise some functions declared in assembly
may not be resolved and linking may fail.

Note: clang may throw away linker list symbols it thinks are unused when
compiling with LTO. To force these symbols to be included, we refer to
them via the __ADDRESSABLE macro in a C file generated from compiled
built-in.o files before linking.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>