Messages in this thread Patch in this message | | | From | Matthias Kaehlcke <> | Subject | [PATCH v3 4/4] amdgpu/dc/calcs: Support clang option for stack alignment | Date | Thu, 8 Feb 2018 12:53:16 -0800 |
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calcs 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.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org> --- Changes in v3: - patch added
Note to self: if this patterns proliferates further we probably want to put the evaluation of the correct compiler flag in some common place.
drivers/gpu/drm/amd/display/dc/calcs/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/Makefile b/drivers/gpu/drm/amd/display/dc/calcs/Makefile index af0f452f3c9f..95f332ee3e7e 100644 --- a/drivers/gpu/drm/amd/display/dc/calcs/Makefile +++ b/drivers/gpu/drm/amd/display/dc/calcs/Makefile @@ -24,7 +24,13 @@ # It calculates Bandwidth and Watermarks values for HW programming # -calcs_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 + +calcs_ccflags := -mhard-float -msse $(cc_stack_align) CFLAGS_dcn_calcs.o := $(calcs_ccflags) CFLAGS_dcn_calc_auto.o := $(calcs_ccflags) -- 2.16.0.rc1.238.g530d649a79-goog
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