Le 27/08/2022 à 18:40, Masahiro Yamada a écrit :
> The checkbin in arch/powerpc/Makefile errors out if ld <= 2.24.
> So, the requirement on PPC is binutils >= 2.25. It is cleaner to
> specify it in scripts/min-tool-version.sh. If binutils < 2.25 is
> used, the toolchain check will fail in the Kconfig stage going
> forward.
>
> Since binutils >= 2.25 is already required, another version test
> for --save-restore-funcs on PPC64 is always met.
>
> PPC is the last user of ld-ifversion. With all the callers removed,
> the macro definition in scripts/Makefile.compiler can go away.
>
> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> ---
>
> arch/powerpc/Makefile | 21 ---------------------
> arch/powerpc/lib/Makefile | 8 --------
> scripts/Makefile.compiler | 4 ----
> scripts/min-tool-version.sh | 8 +++++++-
> 4 files changed, 7 insertions(+), 34 deletions(-)
>
> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> index 02742facf895..fb607758eeca 100644
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@ -46,13 +46,7 @@ UTS_MACHINE := $(subst $(space),,$(machine-y))
> ifdef CONFIG_PPC32
> KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
> else
> -ifeq ($(call ld-ifversion, -ge, 22500, y),y)
> -# Have the linker provide sfpr if possible.
> -# There is a corresponding test in arch/powerpc/lib/Makefile
> KBUILD_LDFLAGS_MODULE += --save-restore-funcs
> -else
> -KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
> -endif
> endif
>
> ifdef CONFIG_CPU_LITTLE_ENDIAN
> @@ -395,8 +389,6 @@ vdso_prepare: prepare0
> $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
> endif
>
> -archprepare: checkbin
> -
> archheaders:
> $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
>
> @@ -411,16 +403,3 @@ else
> $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
> endif
> endif
> -
> -PHONY += checkbin
> -# Check toolchain versions:
> -# - gcc-4.6 is the minimum kernel-wide version so nothing required.
> -checkbin:
> - @if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \
> - "x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \
> - echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
> - echo 'in some circumstances.' ; \
> - echo '*** binutils 2.23 do not define the TOC symbol ' ; \
> - echo -n '*** Please use a different binutils version.' ; \
> - false ; \
> - fi
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 8560c912186d..5eb3971ccb9c 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -38,14 +38,6 @@ obj-$(CONFIG_PPC32) += div64.o copy_32.o crtsavres.o
>
> obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
>
> -# See corresponding test in arch/powerpc/Makefile
> -# 64-bit linker creates .sfpr on demand for final link (vmlinux),
> -# so it is only needed for modules, and only for older linkers which
> -# do not support --save-restore-funcs
> -ifeq ($(call ld-ifversion, -lt, 22500, y),y)
> -extra-$(CONFIG_PPC64) += crtsavres.o
> -endif
> -
> obj-$(CONFIG_PPC_BOOK3S_64) += copyuser_power7.o copypage_power7.o \
> memcpy_power7.o restart_table.o
>
> diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler
> index 94d0d40cddb3..63e7d79dd877 100644
> --- a/scripts/Makefile.compiler
> +++ b/scripts/Makefile.compiler
> @@ -68,7 +68,3 @@ cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || e
> # ld-option
> # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
> ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
> -
> -# ld-ifversion
> -# Usage: $(call ld-ifversion, -ge, 22252, y)
> -ld-ifversion = $(shell [ $(CONFIG_LD_VERSION)0 $(1) $(2)0 ] && echo $(3) || echo $(4))
> diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
> index 250925aab101..7df9f2150ea1 100755
> --- a/scripts/min-tool-version.sh
> +++ b/scripts/min-tool-version.sh
> @@ -14,7 +14,13 @@ fi
>
> case "$1" in
> binutils)
> - echo 2.23.0
> + if [ "$SRCARCH" = powerpc ]; then
Isn't this limitation only for ppc64le ?
Refer commit 60e065f70bdb ("powerpc: Reject binutils 2.24 when building
little endian")
> + # binutils 2.24 miscompiles weak symbols in some circumstances
> + # binutils 2.23 do not define the TOC symbol
> + echo 2.25.0
> + else
> + echo 2.23.0
> + fi
> ;;
> gcc)
> echo 5.1.0
