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
$(MODULE)-objs += zstd_sparc.o

all:
	mkdir -p lib

gensymbols:
	@OBJDUMP@ -t lib/zstd.o | awk '$$2 == "g" && !/ zfs_/ {print "#define\t" $$6 " zfs_" $$6}' | sort >> include/zstd_compat_wrapper.h

checksymbols:
	@OBJDUMP@ -t lib/zstd.o | awk '/file format/ {print}  $$2 == "g" && (!/ zfs_/ && !/ __pfx_zfs_/) {++ret; print}  END {exit ret}'