From: Greg Hackmann <ghackm...@google.com> LLVM bug 30792 causes clang's AArch64 backend to crash compiling arch/arm64/crypto/aes-ce-cipher.c. Replacing -mgeneral-regs-only with -mno-implicit-float is the suggested workaround.
Signed-off-by: Greg Hackmann <ghackm...@google.com> Cc: Matthias Kaehlcke <m...@chromium.org> [added cc-ifversion to enable the workaround only for clang <6.0] Signed-off-by: Sami Tolvanen <samitolva...@google.com> --- arch/arm64/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index b35788c909f1..ecd5ed11c764 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -49,7 +49,13 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable) endif endif -KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) +ifeq ($(cc-name),clang) +# This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792. +KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0600, -mno-implicit-float, -mgeneral-regs-only) +else +KBUILD_CFLAGS += -mgeneral-regs-only +endif +KBUILD_CFLAGS += $(lseinstr) $(brokengasinst) KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) -- 2.15.0.448.gf294e3d99a-goog
