moved xxhash to lib/common
diff --git a/lib/Makefile b/lib/Makefile
index 9043669..b4133a7 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -2,19 +2,19 @@
 # ZSTD library - Makefile
 # Copyright (C) Yann Collet 2015-2016
 # All rights reserved.
-# 
+#
 # BSD license
 
 # Redistribution and use in source and binary forms, with or without modification,
 # are permitted provided that the following conditions are met:
-# 
+#
 # * Redistributions of source code must retain the above copyright notice, this
 #   list of conditions and the following disclaimer.
-# 
+#
 # * Redistributions in binary form must reproduce the above copyright notice, this
 #   list of conditions and the following disclaimer in the documentation and/or
 #   other materials provided with the distribution.
-# 
+#
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
@@ -25,7 +25,7 @@
 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-# 
+#
 # You can contact the author at :
 #  - ZSTD homepage : http://www.zstd.net
 # ################################################################
@@ -43,7 +43,7 @@
 
 DESTDIR?=
 PREFIX ?= /usr/local
-CPPFLAGS= -I./common
+CPPFLAGS= -I./common -DXXH_NAMESPACE=ZSTD_
 CFLAGS ?= -O3
 CFLAGS += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wstrict-prototypes -Wundef
 FLAGS   = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)
@@ -51,10 +51,11 @@
 LIBDIR ?= $(PREFIX)/lib
 INCLUDEDIR=$(PREFIX)/include
 
-ZSTDCOMP_FILES := compress/zstd_compress.c compress/fse_compress.c compress/huf_compress.c compress/zbuff_compress.c 
-ZSTDDECOMP_FILES := decompress/zstd_decompress.c common/fse_decompress.c decompress/huf_decompress.c decompress/zbuff_decompress.c
+ZSTDCOMMON_FILES := common/fse_decompress.c common/zstd_common.c common/entropy_common.c common/xxhash.c
+ZSTDCOMP_FILES := compress/zstd_compress.c compress/fse_compress.c compress/huf_compress.c compress/zbuff_compress.c
+ZSTDDECOMP_FILES := decompress/zstd_decompress.c decompress/huf_decompress.c decompress/zbuff_decompress.c
 ZSTDDICT_FILES := dictBuilder/zdict.c dictBuilder/divsufsort.c
-ZSTD_FILES := $(ZSTDDECOMP_FILES) common/entropy_common.c common/zstd_common.c $(ZSTDCOMP_FILES) $(ZSTDDICT_FILES)
+ZSTD_FILES := $(ZSTDCOMMON_FILES) $(ZSTDDECOMP_FILES) $(ZSTDCOMP_FILES) $(ZSTDDICT_FILES)
 ZSTD_LEGACY:= legacy/zstd_v01.c legacy/zstd_v02.c legacy/zstd_v03.c legacy/zstd_v04.c legacy/zstd_v05.c
 
 ifeq ($(ZSTD_LEGACY_SUPPORT), 0)
diff --git a/programs/xxhash.c b/lib/common/xxhash.c
similarity index 100%
rename from programs/xxhash.c
rename to lib/common/xxhash.c
diff --git a/programs/xxhash.h b/lib/common/xxhash.h
similarity index 100%
rename from programs/xxhash.h
rename to lib/common/xxhash.h
diff --git a/lib/common/zstd.h b/lib/common/zstd.h
index dbcf62b..3ac4056 100644
--- a/lib/common/zstd.h
+++ b/lib/common/zstd.h
@@ -60,8 +60,8 @@
 *  Version
 ***************************************/
 #define ZSTD_VERSION_MAJOR    0
-#define ZSTD_VERSION_MINOR    6
-#define ZSTD_VERSION_RELEASE  2
+#define ZSTD_VERSION_MINOR    7
+#define ZSTD_VERSION_RELEASE  0
 
 #define ZSTD_LIB_VERSION ZSTD_VERSION_MAJOR.ZSTD_VERSION_MINOR.ZSTD_VERSION_RELEASE
 #define ZSTD_QUOTE(str) #str
diff --git a/programs/Makefile b/programs/Makefile
index 78ffefa..4ffb65c 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -33,7 +33,7 @@
 
 DESTDIR?=
 PREFIX ?= /usr/local
-CPPFLAGS= -I../lib/common
+CPPFLAGS= -I../lib/common -DXXH_NAMESPACE=ZSTD_
 CFLAGS ?= -O3  # -falign-loops=32   # not always beneficial
 CFLAGS += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 -Wswitch-enum -Wstrict-prototypes -Wundef
 FLAGS   = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)
@@ -42,11 +42,12 @@
 MANDIR  = $(PREFIX)/share/man/man1
 ZSTDDIR = ../lib
 
-ZSTDCOMP_FILES := $(ZSTDDIR)/common/fse_decompress.c $(ZSTDDIR)/compress/zstd_compress.c $(ZSTDDIR)/compress/fse_compress.c $(ZSTDDIR)/compress/huf_compress.c $(ZSTDDIR)/common/zstd_common.c $(ZSTDDIR)/common/entropy_common.c
-ZSTDDECOMP_FILES := $(ZSTDDIR)/decompress/zstd_decompress.c $(ZSTDDIR)/common/fse_decompress.c $(ZSTDDIR)/decompress/huf_decompress.c $(ZSTDDIR)/common/zstd_common.c $(ZSTDDIR)/common/entropy_common.c
+ZSTDCOMMON_FILES := $(ZSTDDIR)/common/fse_decompress.c $(ZSTDDIR)/common/zstd_common.c $(ZSTDDIR)/common/entropy_common.c $(ZSTDDIR)/common/xxhash.c
+ZSTDCOMP_FILES := $(ZSTDDIR)/compress/zstd_compress.c $(ZSTDDIR)/compress/fse_compress.c $(ZSTDDIR)/compress/huf_compress.c
+ZSTDDECOMP_FILES := $(ZSTDDIR)/decompress/zstd_decompress.c $(ZSTDDIR)/decompress/huf_decompress.c
 ZDICT_FILES := $(ZSTDDIR)/dictBuilder/zdict.c $(ZSTDDIR)/dictBuilder/divsufsort.c
 ZBUFF_FILES := $(ZSTDDIR)/compress/zbuff_compress.c $(ZSTDDIR)/decompress/zbuff_decompress.c
-ZSTD_FILES := $(ZSTDDECOMP_FILES) $(ZSTDCOMP_FILES)
+ZSTD_FILES := $(ZSTDCOMMON_FILES) $(ZSTDDECOMP_FILES) $(ZSTDCOMP_FILES)
 
 ifeq ($(ZSTD_LEGACY_SUPPORT), 0)
 CPPFLAGS  += -DZSTD_LEGACY_SUPPORT=0
@@ -79,11 +80,11 @@
 all: zstd fullbench fuzzer zbufftest paramgrill datagen zstd32 fullbench32 fuzzer32 zbufftest32
 
 zstd  : $(ZSTD_FILES) $(ZSTD_FILES_LEGACY) $(ZBUFF_FILES) $(ZDICT_FILES) \
-        zstdcli.c fileio.c bench.c xxhash.c datagen.c dibio.c
+        zstdcli.c fileio.c bench.c datagen.c dibio.c
 	$(CC)      $(FLAGS) -DZSTD_LEGACY_SUPPORT=$(ZSTD_LEGACY_SUPPORT) $^ -o $@$(EXT)
 
 zstd32: $(ZSTD_FILES) $(ZSTD_FILES_LEGACY) $(ZBUFF_FILES) $(ZDICT_FILES) \
-        zstdcli.c fileio.c bench.c xxhash.c datagen.c dibio.c
+        zstdcli.c fileio.c bench.c datagen.c dibio.c
 	$(CC) -m32 $(FLAGS) -DZSTD_LEGACY_SUPPORT=$(ZSTD_LEGACY_SUPPORT) $^ -o $@$(EXT)
 
 zstd_nolegacy :
@@ -103,10 +104,10 @@
 zstd-frugal: $(ZSTD_FILES) $(ZBUFF_FILES) zstdcli.c fileio.c
 	$(CC)      $(FLAGS) -DZSTD_NOBENCH -DZSTD_NODICT -DZSTD_LEGACY_SUPPORT=0 $^ -o zstd$(EXT)
 
-zstd-compress: $(ZSTDCOMP_FILES) $(ZSTDDIR)/compress/zbuff_compress.c zstdcli.c fileio.c
+zstd-compress: $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES) $(ZSTDDIR)/compress/zbuff_compress.c zstdcli.c fileio.c
 	$(CC)      $(FLAGS) -DZSTD_NOBENCH -DZSTD_NODICT -DZSTD_NODECOMPRESS -DZSTD_LEGACY_SUPPORT=0 $^ -o $@$(EXT)
 
-zstd-decompress: $(ZSTDDECOMP_FILES) $(ZSTDDIR)/decompress/zbuff_decompress.c zstdcli.c fileio.c
+zstd-decompress: $(ZSTDCOMMON_FILES) $(ZSTDDECOMP_FILES) $(ZSTDDIR)/decompress/zbuff_decompress.c zstdcli.c fileio.c
 	$(CC)      $(FLAGS) -DZSTD_NOBENCH -DZSTD_NODICT -DZSTD_NOCOMPRESS -DZSTD_LEGACY_SUPPORT=0 $^ -o $@$(EXT)
 
 zstd-small: clean
@@ -119,22 +120,22 @@
 	$(CC) -m32 $(FLAGS) $^ -o $@$(EXT)
 
 fuzzer  : $(ZSTD_FILES) \
-      datagen.c xxhash.c fuzzer.c
+      datagen.c fuzzer.c
 	$(CC)      $(FLAGS) $^ -o $@$(EXT)
 
 fuzzer32: $(ZSTD_FILES) \
-      datagen.c xxhash.c fuzzer.c
+      datagen.c fuzzer.c
 	$(CC) -m32 $(FLAGS) $^ -o $@$(EXT)
 
 zbufftest  : $(ZSTD_FILES) $(ZBUFF_FILES) \
-      datagen.c xxhash.c zbufftest.c
+      datagen.c zbufftest.c
 	$(CC)      $(FLAGS) $^ -o $@$(EXT)
 
 zbufftest32: $(ZSTD_FILES) $(ZBUFF_FILES) \
-      datagen.c xxhash.c zbufftest.c
+      datagen.c zbufftest.c
 	$(CC) -m32 $(FLAGS) $^ -o $@$(EXT)
 
-paramgrill : $(ZSTD_FILES) datagen.c xxhash.c paramgrill.c
+paramgrill : $(ZSTD_FILES) datagen.c paramgrill.c
 	$(CC)      $(FLAGS) $^ -lm -o $@$(EXT)
 
 datagen : datagen.c datagencli.c