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SubjectRe: [PATCH v3] powerpc/boot: Don't always pass -mcpu=powerpc when building 32-bit uImage
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Le 28/08/2022 à 11:56, Pali Rohár a écrit :
> When CONFIG_TARGET_CPU is specified then pass its value to the compiler
> -mcpu option. This fixes following build error when building kernel with
> powerpc e500 SPE capable cross compilers:
>
> BOOTAS arch/powerpc/boot/crt0.o
> powerpc-linux-gnuspe-gcc: error: unrecognized argument in option ‘-mcpu=powerpc’
> powerpc-linux-gnuspe-gcc: note: valid arguments to ‘-mcpu=’ are: 8540 8548 native
> make[1]: *** [arch/powerpc/boot/Makefile:231: arch/powerpc/boot/crt0.o] Error 1

corenet64_smp_defconfig :

BOOTAS arch/powerpc/boot/crt0.o
powerpc64-linux-gcc: error: missing argument to '-mcpu='
make[1]: *** [arch/powerpc/boot/Makefile:237 : arch/powerpc/boot/crt0.o]
Erreur 1
make: *** [arch/powerpc/Makefile:253 : uImage] Erreur 2


Christophe


>
> Similar change was already introduced for the main powerpc Makefile in
> commit 446cda1b21d9 ("powerpc/32: Don't always pass -mcpu=powerpc to the
> compiler").
>
> Fixes: 40a75584e526 ("powerpc/boot: Build wrapper for an appropriate CPU")
> Cc: stable@vger.kernel.org # 446cda1b21d9 ("powerpc/32: Don't always pass -mcpu=powerpc to the compiler")
> Signed-off-by: Pali Rohár <pali@kernel.org>
> ---
> arch/powerpc/boot/Makefile | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
> index a9cd2ea4a861..1957a3de7a1c 100644
> --- a/arch/powerpc/boot/Makefile
> +++ b/arch/powerpc/boot/Makefile
> @@ -38,13 +38,19 @@ BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
> $(LINUXINCLUDE)
>
> ifdef CONFIG_PPC64_BOOT_WRAPPER
> -ifdef CONFIG_CPU_LITTLE_ENDIAN
> -BOOTCFLAGS += -m64 -mcpu=powerpc64le
> +BOOTCFLAGS += -m64
> else
> -BOOTCFLAGS += -m64 -mcpu=powerpc64
> +BOOTCFLAGS += -m32
> endif
> +
> +ifdef CONFIG_TARGET_CPU_BOOL
> +BOOTCFLAGS += -mcpu=$(CONFIG_TARGET_CPU)
> +else ifdef CONFIG_PPC64_BOOT_WRAPPER
> +ifdef CONFIG_CPU_LITTLE_ENDIAN
> +BOOTCFLAGS += -mcpu=powerpc64le
> else
> -BOOTCFLAGS += -m32 -mcpu=powerpc
> +BOOTCFLAGS += -mcpu=powerpc64
> +endif
> endif
>
> BOOTCFLAGS += -isystem $(shell $(BOOTCC) -print-file-name=include)
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