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> --- 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 b8cadf833e71..740975931d21 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. -subdir-ccflags-y += -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 + +subdir-ccflags-y += -mhard-float -msse $(cc_stack_align) DML = display_mode_lib.o display_rq_dlg_calc.o \ display_rq_dlg_helpers.o dml1_display_rq_dlg_calc.o \ -- 2.16.0.rc1.238.g530d649a79-goog
