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diff --git a/deps/libchdr/deps/zstd-1.5.5/tests/Makefile b/deps/libchdr/deps/zstd-1.5.5/tests/Makefile
new file mode 100644
index 00000000..778c7d67
--- /dev/null
+++ b/deps/libchdr/deps/zstd-1.5.5/tests/Makefile
@@ -0,0 +1,468 @@
+
+# ################################################################
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# You may select, at your option, one of the above-listed licenses.
+# ################################################################
+# datagen : Synthetic and parametrable data generator, for tests
+# fullbench  : Precisely measure speed for each zstd inner functions
+# fullbench32: Same as fullbench, but forced to compile in 32-bits mode
+# fuzzer  : Test tool, to check zstd integrity on target platform
+# fuzzer32: Same as fuzzer, but forced to compile in 32-bits mode
+# paramgrill : parameter tester for zstd
+# test-zstd-speed.py : script for testing zstd speed difference between commits
+# versionsTest : compatibility test between zstd versions stored on Github (v0.1+)
+# zstreamtest : Fuzzer test tool for zstd streaming API
+# zstreamtest32: Same as zstreamtest, but forced to compile in 32-bits mode
+# ##########################################################################
+
+LIBZSTD = ../lib
+
+ZSTD_LEGACY_SUPPORT ?= 0
+
+DEBUGLEVEL ?= 2
+export DEBUGLEVEL  # transmit value to sub-makefiles
+
+include $(LIBZSTD)/libzstd.mk
+
+ZSTDDIR = $(LIBZSTD)
+PRGDIR  = ../programs
+PYTHON ?= python3
+TESTARTEFACT := versionsTest
+
+DEBUGFLAGS += -g -Wno-c++-compat
+CPPFLAGS   += -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/compress \
+              -I$(ZSTDDIR)/dictBuilder -I$(ZSTDDIR)/deprecated -I$(PRGDIR) \
+              -DZSTD_WINDOW_OVERFLOW_CORRECT_FREQUENTLY=1
+
+ZSTDCOMMON_FILES := $(sort $(ZSTD_COMMON_FILES))
+ZSTDCOMP_FILES   := $(sort $(ZSTD_COMPRESS_FILES))
+ZSTDDECOMP_FILES := $(sort $(ZSTD_DECOMPRESS_FILES))
+ZSTD_FILES  := $(ZSTDDECOMP_FILES) $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES)
+ZDICT_FILES := $(sort $(ZSTD_DICTBUILDER_FILES))
+
+ZSTD_F1 := $(sort $(wildcard $(ZSTD_FILES)))
+ZSTD_OBJ1 := $(subst $(ZSTDDIR)/common/,zstdm_,$(ZSTD_F1))
+ZSTD_OBJ2 := $(subst $(ZSTDDIR)/compress/,zstdc_,$(ZSTD_OBJ1))
+ZSTD_OBJ3 := $(subst $(ZSTDDIR)/decompress/,zstdd_,$(ZSTD_OBJ2))
+ZSTD_OBJ4 := $(ZSTD_OBJ3:.c=.o)
+ZSTD_OBJECTS := $(ZSTD_OBJ4:.S=.o)
+
+ZSTDMT_OBJ1 := $(subst $(ZSTDDIR)/common/,zstdmt_m_,$(ZSTD_F1))
+ZSTDMT_OBJ2 := $(subst $(ZSTDDIR)/compress/,zstdmt_c_,$(ZSTDMT_OBJ1))
+ZSTDMT_OBJ3 := $(subst $(ZSTDDIR)/decompress/,zstdmt_d_,$(ZSTDMT_OBJ2))
+ZSTDMT_OBJ4 := $(ZSTDMT_OBJ3:.c=.o)
+ZSTDMT_OBJECTS := $(ZSTDMT_OBJ4:.S=.o)
+
+# Define *.exe as extension for Windows systems
+ifneq (,$(filter Windows%,$(OS)))
+EXT =.exe
+MULTITHREAD_CPP = -DZSTD_MULTITHREAD
+MULTITHREAD_LD  =
+else
+EXT =
+MULTITHREAD_CPP = -DZSTD_MULTITHREAD
+MULTITHREAD_LD  = -pthread
+endif
+MULTITHREAD = $(MULTITHREAD_CPP) $(MULTITHREAD_LD)
+
+VOID = /dev/null
+ZSTREAM_TESTTIME ?= -T90s
+FUZZERTEST ?= -T200s
+ZSTDRTTEST = --test-large-data
+DECODECORPUS_TESTTIME ?= -T30
+
+.PHONY: default
+default: fullbench
+
+.PHONY: all
+all: fullbench fuzzer zstreamtest paramgrill datagen decodecorpus roundTripCrash poolTests
+
+.PHONY: all32
+all32: fullbench32 fuzzer32 zstreamtest32
+
+.PHONY: allnothread
+allnothread: MULTITHREAD_CPP=
+allnothread: MULTITHREAD_LD=
+allnothread: fullbench fuzzer paramgrill datagen decodecorpus
+
+# note : broken : requires symbols unavailable from dynamic library
+.PHONY: dll
+dll: fuzzer-dll zstreamtest-dll
+
+.PHONY: zstd zstd32 zstd-nolegacy  # only external makefile knows how to build or update them
+zstd zstd32 zstd-nolegacy zstd-dll:
+	$(MAKE) -C $(PRGDIR) $@ MOREFLAGS+="$(DEBUGFLAGS)"
+
+.PHONY: libzstd
+libzstd :
+	$(MAKE) -C $(ZSTDDIR) libzstd MOREFLAGS+="$(DEBUGFLAGS)"
+
+%-dll : libzstd
+%-dll : LDFLAGS += -L$(ZSTDDIR) -lzstd
+
+$(ZSTDDIR)/libzstd.a :
+	$(MAKE) -C $(ZSTDDIR) libzstd.a
+
+zstdm_%.o : $(ZSTDDIR)/common/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdc_%.o : $(ZSTDDIR)/compress/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdd_%.o : $(ZSTDDIR)/decompress/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdd_%.o : $(ZSTDDIR)/decompress/%.S
+	$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@
+
+zstdmt%.o : CPPFLAGS += $(MULTITHREAD_CPP)
+
+zstdmt_m_%.o : $(ZSTDDIR)/common/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdmt_c_%.o : $(ZSTDDIR)/compress/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdmt_d_%.o : $(ZSTDDIR)/decompress/%.c
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+zstdmt_d_%.o : $(ZSTDDIR)/decompress/%.S
+	$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@
+
+FULLBENCHS := fullbench fullbench32
+CLEAN += $(FULLBENCHS)
+fullbench32: CPPFLAGS += -m32
+$(FULLBENCHS) : CPPFLAGS += $(MULTITHREAD_CPP) -Wno-deprecated-declarations
+$(FULLBENCHS) : LDFLAGS += $(MULTITHREAD_LD)
+$(FULLBENCHS) : DEBUGFLAGS = -DNDEBUG  # turn off assert() for speed measurements
+$(FULLBENCHS) : $(ZSTD_FILES)
+$(FULLBENCHS) : $(PRGDIR)/datagen.c $(PRGDIR)/util.c $(PRGDIR)/timefn.c $(PRGDIR)/benchfn.c fullbench.c
+	$(LINK.c) $^ -o $@$(EXT)
+
+CLEAN += fullbench-lib
+fullbench-lib : CPPFLAGS += -DXXH_NAMESPACE=ZSTD_
+fullbench-lib : $(PRGDIR)/datagen.c $(PRGDIR)/util.c $(PRGDIR)/timefn.c $(PRGDIR)/benchfn.c $(ZSTDDIR)/libzstd.a fullbench.c
+	$(LINK.c) $^ -o $@$(EXT)
+
+# note : broken : requires symbols unavailable from dynamic library
+fullbench-dll: $(PRGDIR)/datagen.c $(PRGDIR)/util.c $(PRGDIR)/benchfn.c $(PRGDIR)/timefn.c fullbench.c
+#	$(CC) $(FLAGS) $(filter %.c,$^) -o $@$(EXT) -DZSTD_DLL_IMPORT=1 $(ZSTDDIR)/dll/libzstd.dll
+	$(LINK.c) $^ $(LDLIBS) -o $@$(EXT)
+
+CLEAN += fuzzer fuzzer32
+fuzzer : CPPFLAGS += $(MULTITHREAD_CPP) -Wno-deprecated-declarations
+fuzzer : LDFLAGS += $(MULTITHREAD_LD)
+fuzzer : $(ZSTDMT_OBJECTS)
+fuzzer fuzzer32 : $(ZDICT_FILES) $(PRGDIR)/util.c $(PRGDIR)/timefn.c $(PRGDIR)/datagen.c fuzzer.c
+
+fuzzer32 : CFLAGS += -m32 $(MULTITHREAD)
+fuzzer32 : $(ZSTD_FILES)
+	$(LINK.c) $^ -o $@$(EXT)
+
+# note : broken : requires symbols unavailable from dynamic library
+fuzzer-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/util.c $(PRGDIR)/timefn.c $(PRGDIR)/datagen.c fuzzer.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
+
+CLEAN += zstreamtest zstreamtest32
+ZSTREAM_LOCAL_FILES := $(PRGDIR)/datagen.c $(PRGDIR)/util.c $(PRGDIR)/timefn.c seqgen.c zstreamtest.c external_matchfinder.c
+ZSTREAM_PROPER_FILES := $(ZDICT_FILES) $(ZSTREAM_LOCAL_FILES)
+ZSTREAMFILES := $(ZSTD_FILES) $(ZSTREAM_PROPER_FILES)
+zstreamtest32 : CFLAGS += -m32
+zstreamtest zstreamtest32 : CPPFLAGS += $(MULTITHREAD_CPP)
+zstreamtest zstreamtest32 : LDFLAGS += $(MULTITHREAD_LD)
+zstreamtest : $(ZSTDMT_OBJECTS) $(ZSTREAM_PROPER_FILES)
+zstreamtest32 : $(ZSTREAMFILES)
+zstreamtest zstreamtest32 :
+	$(LINK.c) $^ -o $@$(EXT)
+
+CLEAN += zstreamtest_asan
+zstreamtest_asan : CFLAGS += -fsanitize=address
+zstreamtest_asan : $(ZSTREAMFILES)
+	$(LINK.c) $(MULTITHREAD) $^ -o $@$(EXT)
+
+CLEAN += zstreamtest_tsan
+zstreamtest_tsan : CFLAGS += -fsanitize=thread
+zstreamtest_tsan : $(ZSTREAMFILES)
+	$(LINK.c) $(MULTITHREAD) $^ -o $@$(EXT)
+
+CLEAN += zstreamtest_ubsan
+zstreamtest_ubsan : CFLAGS += -fsanitize=undefined
+zstreamtest_ubsan : $(ZSTREAMFILES)
+	$(LINK.c) $(MULTITHREAD) $^ -o $@$(EXT)
+
+# note : broken : requires symbols unavailable from dynamic library
+zstreamtest-dll : $(ZSTDDIR)/common/xxhash.c  # xxh symbols not exposed from dll
+zstreamtest-dll : $(ZSTREAM_LOCAL_FILES)
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
+
+CLEAN += paramgrill
+paramgrill : DEBUGFLAGS =   # turn off debug for speed measurements
+paramgrill : LDLIBS += -lm
+paramgrill : $(ZSTD_FILES) $(PRGDIR)/util.c $(PRGDIR)/timefn.c $(PRGDIR)/benchfn.c $(PRGDIR)/benchzstd.c $(PRGDIR)/datagen.c paramgrill.c
+
+CLEAN += datagen
+datagen : $(PRGDIR)/datagen.c datagencli.c
+	$(LINK.c) $^ -o $@$(EXT)
+
+CLEAN += roundTripCrash
+roundTripCrash: CFLAGS += $(MULTITHREAD)
+roundTripCrash : $(ZSTD_OBJECTS) roundTripCrash.c
+
+CLEAN += longmatch
+longmatch : $(ZSTD_OBJECTS) longmatch.c
+
+CLEAN += bigdict
+bigdict: CFLAGS += $(MULTITHREAD)
+bigdict: $(ZSTDMT_OBJECTS) $(PRGDIR)/datagen.c bigdict.c
+
+CLEAN += invalidDictionaries
+invalidDictionaries : $(ZSTD_OBJECTS) invalidDictionaries.c
+
+CLEAN += legacy
+legacy : CPPFLAGS += -I$(ZSTDDIR)/legacy -UZSTD_LEGACY_SUPPORT -DZSTD_LEGACY_SUPPORT=4
+legacy : $(ZSTD_FILES) $(sort $(wildcard $(ZSTDDIR)/legacy/*.c)) legacy.c
+
+CLEAN += decodecorpus
+decodecorpus : LDLIBS += -lm
+decodecorpus : $(filter-out zstdc_zstd_compress.o, $(ZSTD_OBJECTS)) $(ZDICT_FILES) $(PRGDIR)/util.c $(PRGDIR)/timefn.c decodecorpus.c
+
+CLEAN += poolTests
+poolTests : $(PRGDIR)/util.c $(PRGDIR)/timefn.c poolTests.c $(ZSTDDIR)/common/pool.c $(ZSTDDIR)/common/threading.c $(ZSTDDIR)/common/zstd_common.c $(ZSTDDIR)/common/error_private.c
+	$(LINK.c) $(MULTITHREAD) $^ -o $@$(EXT)
+
+.PHONY: versionsTest
+versionsTest: clean
+	$(PYTHON) test-zstd-versions.py
+
+.PHONY: automated_benchmarking
+automated_benchmarking: clean
+	$(PYTHON) automated_benchmarking.py
+
+# make checkTag : check that release tag corresponds to release version
+CLEAN += checkTag
+checkTag.o : $(ZSTDDIR)/zstd.h
+
+.PHONY: clean
+clean:
+	$(MAKE) -C $(ZSTDDIR) clean
+	$(MAKE) -C $(PRGDIR) clean
+	$(RM) -fR $(TESTARTEFACT)
+	$(RM) -rf tmp*  # some test directories are named tmp*
+	$(RM) $(CLEAN) core *.o *.tmp result* *.gcda dictionary *.zst \
+        $(PRGDIR)/zstd$(EXT) $(PRGDIR)/zstd32$(EXT) \
+        fullbench-dll$(EXT) fuzzer-dll$(EXT) zstreamtest-dll$(EXT)
+	@echo Cleaning completed
+
+
+#----------------------------------------------------------------------------------
+# valgrind tests validated only for some posix platforms
+#----------------------------------------------------------------------------------
+UNAME := $(shell uname)
+ifneq (,$(filter $(UNAME),Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS AIX))
+HOST_OS = POSIX
+
+.PHONY: test-valgrind
+test-valgrind: VALGRIND = valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1
+test-valgrind: zstd datagen fuzzer fullbench
+	@echo "\n ---- valgrind tests : memory analyzer ----"
+	$(VALGRIND) ./datagen -g50M > $(VOID)
+	$(VALGRIND) $(PRGDIR)/zstd ; if [ $$? -eq 0 ] ; then echo "zstd without argument should have failed"; false; fi
+	./datagen -g80 | $(VALGRIND) $(PRGDIR)/zstd - -c > $(VOID)
+	./datagen -g16KB | $(VALGRIND) $(PRGDIR)/zstd -vf - -c > $(VOID)
+	./datagen -g2930KB | $(VALGRIND) $(PRGDIR)/zstd -5 -vf - -o tmp
+	$(VALGRIND) $(PRGDIR)/zstd -vdf tmp -c > $(VOID)
+	./datagen -g64MB | $(VALGRIND) $(PRGDIR)/zstd -vf - -c > $(VOID)
+	$(RM) tmp
+	$(VALGRIND) ./fuzzer -T1mn -t1
+	$(VALGRIND) ./fullbench -i1
+
+endif
+
+ifneq (,$(filter MINGW% MSYS%,$(UNAME)))
+  HOST_OS = MSYS
+endif
+
+
+#-----------------------------------------------------------------------------
+# make tests validated only for below targets
+#-----------------------------------------------------------------------------
+ifneq (,$(filter $(HOST_OS),MSYS POSIX))
+
+DIFF:=diff
+ifneq (,$(filter $(UNAME),SunOS))
+  DIFF:=gdiff
+endif
+
+.PHONY: list
+list:
+	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | xargs
+
+.PHONY: shortest
+shortest: ZSTDRTTEST=  # remove long tests
+shortest: test-zstd
+
+.PHONY: check
+check: shortest
+
+.PHONY: fuzztest
+fuzztest: test-fuzzer test-zstream test-decodecorpus
+
+.PHONY: test
+test: test-zstd test-fullbench test-fuzzer test-zstream test-invalidDictionaries test-legacy test-decodecorpus test-cli-tests
+ifeq ($(QEMU_SYS),)
+test: test-pool
+endif
+
+.PHONY: test32
+test32: test-zstd32 test-fullbench32 test-fuzzer32 test-zstream32
+
+.PHONY: test-all
+test-all: test test32 test-decodecorpus-cli
+
+.PHONY: test-zstd test-zstd32 test-zstd-nolegacy
+test-zstd: ZSTD = $(PRGDIR)/zstd
+test-zstd: zstd
+
+.PHONY: test-zstd-dll
+test-zstd-dll: ZSTD = $(PRGDIR)/zstd
+test-zstd-dll: zstd-dll
+
+test-zstd32: ZSTD = $(PRGDIR)/zstd32
+test-zstd32: zstd32
+
+test-zstd-nolegacy: ZSTD = $(PRGDIR)/zstd-nolegacy
+test-zstd-nolegacy: zstd-nolegacy
+
+test-zstd test-zstd32 test-zstd-nolegacy test-zstd-dll: datagen
+	file $(ZSTD)
+	EXE_PREFIX="$(QEMU_SYS)" ZSTD_BIN="$(ZSTD)" DATAGEN_BIN=./datagen ./playTests.sh $(ZSTDRTTEST)
+
+.PHONY: test-cli-tests
+test-cli-tests: ZSTD = $(PRGDIR)/zstd
+test-cli-tests: zstd datagen
+	file $(ZSTD)
+	./cli-tests/run.py --exec-prefix="$(QEMU_SYS)" --zstd="$(ZSTD)" --datagen=./datagen
+
+.PHONY: test-fullbench
+test-fullbench: fullbench datagen
+	$(QEMU_SYS) ./fullbench -i1
+	$(QEMU_SYS) ./fullbench -i1 -P0
+
+.PHONY: test-fullbench32
+test-fullbench32: fullbench32 datagen
+	$(QEMU_SYS) ./fullbench32 -i1
+	$(QEMU_SYS) ./fullbench32 -i1 -P0
+
+.PHONY: test-fuzzer
+test-fuzzer: fuzzer
+	$(QEMU_SYS) ./fuzzer -v $(FUZZERTEST) $(FUZZER_FLAGS)
+
+# Note : this test presumes `fuzzer` will be built
+.PHONY: test-fuzzer-stackmode
+test-fuzzer-stackmode: MOREFLAGS += -DZSTD_HEAPMODE=0
+test-fuzzer-stackmode: test-fuzzer
+
+.PHONY: test-fuzzer32
+test-fuzzer32: fuzzer32
+	$(QEMU_SYS) ./fuzzer32 -v $(FUZZERTEST) $(FUZZER_FLAGS)
+
+.PHONY: test-zstream
+test-zstream: zstreamtest
+	$(QEMU_SYS) ./zstreamtest -v $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+	$(QEMU_SYS) ./zstreamtest --newapi -t1 $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+
+test-zstream32: zstreamtest32
+	$(QEMU_SYS) ./zstreamtest32 -v $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+
+test-longmatch: longmatch
+	$(QEMU_SYS) ./longmatch
+
+test-bigdict: bigdict
+	$(QEMU_SYS) ./bigdict
+
+test-invalidDictionaries: invalidDictionaries
+	$(QEMU_SYS) ./invalidDictionaries
+
+test-legacy: legacy
+	$(QEMU_SYS) ./legacy
+
+test-decodecorpus: decodecorpus
+	$(QEMU_SYS) ./decodecorpus -t $(DECODECORPUS_TESTTIME)
+
+test-decodecorpus-cli: decodecorpus
+	@echo "\n ---- decodecorpus basic cli tests ----"
+	@mkdir testdir
+	./decodecorpus -n5 -otestdir -ptestdir
+	@cd testdir && \
+	$(ZSTD) -d z000000.zst -o tmp0 && \
+	$(ZSTD) -d z000001.zst -o tmp1 && \
+	$(ZSTD) -d z000002.zst -o tmp2 && \
+	$(ZSTD) -d z000003.zst -o tmp3 && \
+	$(ZSTD) -d z000004.zst -o tmp4 && \
+	diff z000000 tmp0 && \
+	diff z000001 tmp1 && \
+	diff z000002 tmp2 && \
+	diff z000003 tmp3 && \
+	diff z000004 tmp4 && \
+	rm ./* && \
+	cd ..
+	@echo "\n ---- decodecorpus dictionary cli tests ----"
+	./decodecorpus -n5 -otestdir -ptestdir --use-dict=1MB
+	@cd testdir && \
+	$(ZSTD) -d z000000.zst -D dictionary -o tmp0 && \
+	$(ZSTD) -d z000001.zst -D dictionary -o tmp1 && \
+	$(ZSTD) -d z000002.zst -D dictionary -o tmp2 && \
+	$(ZSTD) -d z000003.zst -D dictionary -o tmp3 && \
+	$(ZSTD) -d z000004.zst -D dictionary -o tmp4 && \
+	diff z000000 tmp0 && \
+	diff z000001 tmp1 && \
+	diff z000002 tmp2 && \
+	diff z000003 tmp3 && \
+	diff z000004 tmp4 && \
+	cd ..
+	@rm -rf testdir
+
+test-pool: poolTests
+	$(QEMU_SYS) ./poolTests
+
+test-lz4: ZSTD = LD_LIBRARY_PATH=/usr/local/lib $(PRGDIR)/zstd
+test-lz4: ZSTD_LZ4 = LD_LIBRARY_PATH=/usr/local/lib ./lz4
+test-lz4: ZSTD_UNLZ4 = LD_LIBRARY_PATH=/usr/local/lib ./unlz4
+test-lz4: zstd decodecorpus datagen
+	[ -f lz4 ] || ln -s $(PRGDIR)/zstd lz4
+	[ -f unlz4 ] || ln -s $(PRGDIR)/zstd unlz4
+
+	./decodecorpus -ptmp
+	# lz4 -> zstd
+	lz4 < tmp | \
+	$(ZSTD) -d | \
+	cmp - tmp
+	lz4 < tmp | \
+	$(ZSTD_UNLZ4) | \
+	cmp - tmp
+	# zstd -> lz4
+	$(ZSTD) --format=lz4 < tmp | \
+	lz4 -d | \
+	cmp - tmp
+	$(ZSTD_LZ4) < tmp | \
+	lz4 -d | \
+	cmp - tmp
+	# zstd -> zstd
+	$(ZSTD) --format=lz4 < tmp | \
+	$(ZSTD) -d | \
+	cmp - tmp
+	# zstd -> zstd
+	$(ZSTD) < tmp | \
+	$(ZSTD) -d | \
+	cmp - tmp
+
+	./datagen -g384KB | $(ZSTD) --format=lz4 | $(ZSTD) -d > /dev/null
+
+	rm tmp lz4 unlz4
+
+endif