Messages in this thread Patch in this message | | | From | Pali Rohár <> | Subject | [PATCH] powerpc: e500: Fix compilation with gcc e500 compiler | Date | Tue, 24 May 2022 11:39:39 +0200 |
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gcc e500 compiler does not support -mcpu=powerpc option. When it is specified then gcc throws compile error:
gcc: error: unrecognized argument in option ‘-mcpu=powerpc’ gcc: note: valid arguments to ‘-mcpu=’ are: 8540 8548 native
So do not set -mcpu=powerpc option when CONFIG_E500 is set. Correct option -mcpu=8540 for CONFIG_E500 is set few lines below in that Makefile.
Signed-off-by: Pali Rohár <pali@kernel.org> Cc: stable@vger.kernel.org --- arch/powerpc/Makefile | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index eb541e730d3c..87f9f29ac9d2 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -22,11 +22,16 @@ ifdef CONFIG_PPC32 # or platform code sets later on the command line, but they are needed # to set a sane 32-bit cpu target for the 64-bit cross compiler which # may default to the wrong ISA. +# Never set -mcpu=powerpc option for gcc e500 compiler because this +# option is unsupported and throws error. The correct option for +# CONFIG_E500 is -mcpu=8540 and it is set few lines below. +ifndef CONFIG_E500 KBUILD_CFLAGS += -mcpu=powerpc KBUILD_AFLAGS += -mcpu=powerpc endif endif endif +endif ifdef CONFIG_PPC_BOOK3S_32 KBUILD_CFLAGS += -mcpu=powerpc -- 2.20.1
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