DML uses the compiler option -mpreferred-stack-boundary=4 to configure a stack alignment of 16 bytes. Clang uses the option -mstack-alignment instead, which expects as parameter the alignment in bytes, and not a power of two like -mpreferred-stack-boundary. Probe for both compiler options and use the correct one, similar to what is done in arch/x86/Makefile. Reported-by: Guenter Roeck <groeck at chromium.org> Signed-off-by: Matthias Kaehlcke <mka at chromium.org> --- Changes in v3: - adapted use of variable instead of subdir-ccflags-y drivers/gpu/drm/amd/display/dc/dml/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dml/Makefile b/drivers/gpu/drm/amd/display/dc/dml/Makefile index 96b337a03172..782886cac61c 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/Makefile +++ b/drivers/gpu/drm/amd/display/dc/dml/Makefile @@ -24,7 +24,13 @@ # It provides the general basic services required by other DAL # subcomponents. -dml_ccflags := -mhard-float -msse -mpreferred-stack-boundary=4 +ifneq ($(call cc-option, -mpreferred-stack-boundary=4),) + cc_stack_align := -mpreferred-stack-boundary=4 +else ifneq ($(call cc-option, -mstack-alignment=16),) + cc_stack_align := -mstack-alignment=16 +endif + +dml_ccflags := -mhard-float -msse $(cc_stack_align) CFLAGS_display_mode_vba.o := $(dml_ccflags) CFLAGS_display_mode_lib.o := $(dml_ccflags) -- 2.16.0.rc1.238.g530d649a79-goog
