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ifneq ($(KBUILD_EXTMOD),)
src = @abs_srcdir@
obj = @abs_builddir@
zstd_include = $(src)/include
else
zstd_include = $(srctree)/$(src)/include
endif
MODULE := zzstd
obj-$(CONFIG_ZFS) := $(MODULE).o
asflags-y := -I$(zstd_include)
ccflags-y := -I$(zstd_include)
# Zstd uses -O3 by default, so we should follow
ccflags-y += -O3
# -fno-tree-vectorize gets set for gcc in zstd/common/compiler.h
# Set it for other compilers, too.
$(obj)/lib/zstd.o: c_flags += -fno-tree-vectorize
# SSE register return with SSE disabled if -march=znverX is passed
$(obj)/lib/zstd.o: c_flags += -U__BMI__
# Quiet warnings about frame size due to unused code in unmodified zstd lib
$(obj)/lib/zstd.o: c_flags += -Wframe-larger-than=20480
# Disable aarch64 neon SIMD instructions for kernel mode
$(obj)/lib/zstd.o: c_flags += -include $(zstd_include)/aarch64_compat.h -include $(zstd_include)/zstd_compat_wrapper.h -Wp,-w
$(obj)/zfs_zstd.o: c_flags += -include $(zstd_include)/zstd_compat_wrapper.h
$(MODULE)-objs += zfs_zstd.o
$(MODULE)-objs += lib/zstd.o
all:
mkdir -p lib
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