Unverified Commit 5ba7a75a authored by Anton Blanchard's avatar Anton Blanchard Committed by Palmer Dabbelt
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riscv: Fix toolchain vector detection 



A recent change to gcc flags rv64iv as no longer valid:

   cc1: sorry, unimplemented: Currently the 'V' implementation
   requires the 'M' extension

and as a result vector support is disabled. Fix this by adding m
to our toolchain vector detection code.

Signed-off-by: default avatarAnton Blanchard <antonb@tenstorrent.com>
Fixes: fa8e7cce ("riscv: Enable Vector code to be built")
Link: https://lore.kernel.org/r/20240819001131.1738806-1-antonb@tenstorrent.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent b686ecde

arch/riscv/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -552,8 +552,8 @@ config RISCV_ISA_SVPBMT 
config TOOLCHAIN_HAS_V

	bool

	default y

	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)

	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)

	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64imv)

	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32imv)

	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800

	depends on AS_HAS_OPTION_ARCH