clang versions previous to 8 do not support -mcmodel=tiny.
Add a check to the vDSO Makefile for arm64 to remove the flag when these versions of the compiler are detected.
Signed-off-by: Vincenzo Frascino vincenzo.frascino@arm.com Reported-by: Qian Cai cai@lca.pw Tested-by: Qian Cai cai@lca.pw --- arch/arm64/kernel/vdso/Makefile | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index ec81d28aeb5d..5154f50aff2d 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -38,6 +38,11 @@ else CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -include $(c-gettimeofday-y) endif
+# Clang versions less than 8 do not support -mcmodel=tiny +ifeq ($(shell test $(CONFIG_CLANG_VERSION) -lt 80000; echo $$?),0) +CFLAGS_REMOVE_vgettimeofday.o += -mcmodel=tiny +endif + # Disable gcov profiling for VDSO code GCOV_PROFILE := n