Commit 4769278e authored Feb 08, 2018 by Matthias Kaehlcke Committed by Alex Deucher Feb 19, 2018

amdgpu/dc/dml: Support clang option for stack alignment



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@chromium.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 37172013

drivers/gpu/drm/amd/display/dc/dml/Makefile

+7 −1

Original line number	Diff line number	Diff line
		@@ -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)

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