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powerpc/boot: Only use '-mabi=elfv2' with CONFIG_PPC64_BOOT_WRAPPER

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When CONFIG_PPC64_ELF_ABI_V2 is enabled with clang through
CONFIG_PPC64_BIG_ENDIAN_ELF_ABI_V2, building the powerpc boot wrapper
in 32-bit mode (i.e. with CONFIG_PPC64_BOOT_WRAPPER=n) fails with:

    error: unknown target ABI 'elfv2'

The ABI cannot be changed with '-m32'; GCC silently accepts it but clang
errors out. Only provide '-mabi=elfv2' when CONFIG_PPC64_BOOT_WRAPPER is
enabled, which is the only way '-mabi=elfv2' will be useful.

Tested-by: "Erhard F." <erhard_f@mailbox.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230118-ppc64-elfv2-llvm-v1-1-b9e2ec9da11d@kernel.org
This commit is contained in:
Nathan Chancellor 2023-02-15 11:41:15 -07:00 committed by Michael Ellerman
parent 8a32341cf0
commit d1c5accacb
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/boot/Makefile
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@ -40,6 +40,9 @@ BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
ifdef CONFIG_PPC64_BOOT_WRAPPER
BOOTCFLAGS += -m64
ifdef CONFIG_PPC64_ELF_ABI_V2
BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
endif
else
BOOTCFLAGS += -m32
endif
@ -61,9 +64,6 @@ BOOTCFLAGS += -mbig-endian
else
BOOTCFLAGS += -mlittle-endian
endif
ifdef CONFIG_PPC64_ELF_ABI_V2
BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
endif
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -nostdinc