From ca6fae78080d0a532ce90be830584212c7350fc2 Mon Sep 17 00:00:00 2001
From: Sean Purcell <me@seanp.xyz>
Date: Tue, 18 Apr 2017 14:13:01 -0700
Subject: [PATCH 1/2] Add MT enabled targets for libzstd

---
 lib/Makefile | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index 197fdeeea..d8d8e179d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -71,6 +71,9 @@ libzstd.a: $(ZSTD_OBJ)
 	@echo compiling static library
 	@$(AR) $(ARFLAGS) $@ $^
 
+libzstd.a-mt: CPPFLAGS += -DZSTD_MULTHREAD
+libzstd.a-mt: libzstd.a
+
 $(LIBZSTD): LDFLAGS += -shared -fPIC -fvisibility=hidden
 $(LIBZSTD): $(ZSTD_FILES)
 	@echo compiling dynamic library $(LIBVER)
@@ -86,10 +89,17 @@ endif
 
 libzstd : $(LIBZSTD)
 
+libzstd-mt : CPPFLAGS += -DZSTD_MULTITHREAD
+libzstd-mt : libzstd
+
 lib: libzstd.a libzstd
 
-lib-release: DEBUGFLAGS :=
+lib-mt: CPPFLAGS += -DZSTD_MULTITHREAD
+lib-mt: lib
+
+lib-release lib-release-mt: DEBUGFLAGS :=
 lib-release: lib
+lib-release-mt: lib-mt
 
 clean:
 	@$(RM) -r *.dSYM   # Mac OS-X specific

From 98cf7fcb2ab311dc40a616cd15774813e1e8517d Mon Sep 17 00:00:00 2001
From: Sean Purcell <me@seanp.xyz>
Date: Tue, 18 Apr 2017 17:03:37 -0700
Subject: [PATCH 2/2] Update README

---
 lib/README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/README.md b/lib/README.md
index 3357e3d87..8fa60a20f 100644
--- a/lib/README.md
+++ b/lib/README.md
@@ -22,6 +22,14 @@ Some additional API may be useful if you're looking into advanced features :
                           They are not "stable", their definition may change in the future.
                           Only static linking is allowed.
 
+#### ZSTDMT API
+
+To enable building the multithreaded compression API, use the `make lib-mt` target.
+The header file zstdmt_compress.h (in compress/) provides the prototypes for the API.
+If linking a program that uses the ZSTDMT API against libzstd.a on a POSIX system,
+the -pthread flag must be provided to the compiler at link time.
+Note that these prototypes may still be used in a version built without multithread support,
+but they will be single threaded (i.e. no benefits will be given over the standard ZSTD API).
 
 #### Modular build