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drm/amd/display: Do not add '-mhard-float' to dml_ccflags for clang

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commit 7db038d9790eda558dd6c1dde4cdd58b64789c47 upstream.

When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
warns:

  clang-16: error: argument unused during compilation: '-mhard-float' [-Werror,-Wunused-command-line-argument]

Similar to commit 84edc2eff827 ("selftest/fpu: avoid clang warning"),
just add this flag to GCC builds. Commit 0f0727d971 ("drm/amd/display:
readd -msse2 to prevent Clang from emitting libcalls to undefined SW FP
routines") added '-msse2' to prevent clang from emitting software
floating point routines.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Chancellor 2023-01-11 20:05:09 -07:00 • committed by Greg Kroah-Hartman
commit d3e3345645
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/dml/Makefile
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@ -24,7 +24,8 @@
# It provides the general basic services required by other DAL
# subcomponents.
dml_ccflags := -mhard-float -msse
dml_ccflags-$(CONFIG_CC_IS_GCC) := -mhard-float
dml_ccflags := $(dml_ccflags-y) -msse
ifdef CONFIG_CC_IS_GCC
ifeq ($(call cc-ifversion, -lt, 0701, y), y)