On Mon, 2018-10-01 at 00:22 +0200, Stefan Agner wrote: > The kernel passes the ArmV6K architecture to the compiler when > using the multi platform selection and enabling ARMv6. Clang > older than version 8.0 emit assembly with an non-existing CPU, > which then makes the assembler fail. Prevent the user from > selecting ARMv6 when using Clang before 8.0. > > Signed-off-by: Stefan Agner <ste...@agner.ch> > Link: https://github.com/ClangBuiltLinux/linux/issues/55 > --- > arch/arm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index e8cd55a5b04c..8da160757381 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -671,6 +671,7 @@ config ARCH_MULTI_V4_V5 > > config ARCH_MULTI_V6 > bool "ARMv6 based platforms (ARM11)" > + depends on !CC_IS_CLANG || CLANG_VERSION>=80000 > select ARCH_MULTI_V6_V7 > select CPU_V6K >
Perhaps it'd be better to avoid this in selection criteria in Kconfig and instead add this to include/linux/compiler_clang.h --- include/linux/compiler-clang.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index b1ce500fe8b3..90fd16c85359 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -3,6 +3,10 @@ #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." #endif +#if defined(CONFIG_ARCH_MULTI_V6) && CLANG_VERSION < 80000 +# error Sorry, your compiler is too old - please upgrade it. +#endif + /* Some compiler specific definitions are overwritten here * for Clang compiler */
