From: Pali Rohár pali@kernel.org
commit ff7c76f66d8bad4e694c264c789249e1d3a8205d upstream.
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
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 # v5.19+ Signed-off-by: Pali Rohár pali@kernel.org Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/2ae3ae5887babfdacc34435bff0944b3f336100a.167463232... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/boot/Makefile | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
--- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -39,13 +39,19 @@ BOOTCFLAGS := -Wall -Wundef -Wstrict- $(LINUXINCLUDE)
ifdef CONFIG_PPC64_BOOT_WRAPPER -ifdef CONFIG_CPU_LITTLE_ENDIAN -BOOTCFLAGS += -m64 -mcpu=powerpc64le +BOOTCFLAGS += -m64 else -BOOTCFLAGS += -m64 -mcpu=powerpc64 +BOOTCFLAGS += -m32 endif + +ifdef CONFIG_TARGET_CPU_BOOL +BOOTCFLAGS += -mcpu=$(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)