ARM: disallow pre-ARMv5 builds with ld.lld
lld cannot build for ARMv4/v4T targets because it inserts 'blx' instructions that are unsupported there: ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected Add a Kconfig time dependency to prevent those targets from being selected in randconfig builds. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Link: https://github.com/llvm/llvm-project/issues/50764 Link: https://github.com/ClangBuiltLinux/linux/issues/964 Link: https://lore.kernel.org/r/20221215162635.3750763-1-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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@ -342,12 +342,14 @@ comment "CPU Core family selection"
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config ARCH_MULTI_V4
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bool "ARMv4 based platforms (FA526, StrongARM)"
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depends on !ARCH_MULTI_V6_V7
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depends on !LD_IS_LLD
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select ARCH_MULTI_V4_V5
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select CPU_FA526 if !(CPU_SA110 || CPU_SA1100)
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config ARCH_MULTI_V4T
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bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
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depends on !ARCH_MULTI_V6_V7
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depends on !LD_IS_LLD
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select ARCH_MULTI_V4_V5
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select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
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CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
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