diff --git a/lib/lz4mt_compress.c b/lib/lz4mt_compress.c
index cbd98b1..abf8148 100644
--- a/lib/lz4mt_compress.c
+++ b/lib/lz4mt_compress.c
@@ -333,7 +333,7 @@ size_t LZ4MT_compressCCtx(LZ4MT_CCtx * ctx, LZ4MT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/lib/lz4mt_decompress.c b/lib/lz4mt_decompress.c
index bd8997c..8540b97 100644
--- a/lib/lz4mt_decompress.c
+++ b/lib/lz4mt_decompress.c
@@ -542,7 +542,7 @@ size_t LZ4MT_decompressDCtx(LZ4MT_DCtx * ctx, LZ4MT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/lib/lz5mt_compress.c b/lib/lz5mt_compress.c
index 9f96e1a..acbfc6a 100644
--- a/lib/lz5mt_compress.c
+++ b/lib/lz5mt_compress.c
@@ -333,7 +333,7 @@ size_t LZ5MT_compressCCtx(LZ5MT_CCtx * ctx, LZ5MT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/lib/lz5mt_decompress.c b/lib/lz5mt_decompress.c
index e02c076..8890760 100644
--- a/lib/lz5mt_decompress.c
+++ b/lib/lz5mt_decompress.c
@@ -542,7 +542,7 @@ size_t LZ5MT_decompressDCtx(LZ5MT_DCtx * ctx, LZ5MT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/lib/zstdmt_compress.c b/lib/zstdmt_compress.c
index eaaf89a..969982d 100644
--- a/lib/zstdmt_compress.c
+++ b/lib/zstdmt_compress.c
@@ -355,7 +355,7 @@ size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx * ctx, ZSTDMT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/lib/zstdmt_decompress.c b/lib/zstdmt_decompress.c
index 1c7af2e..d588a5b 100644
--- a/lib/zstdmt_decompress.c
+++ b/lib/zstdmt_decompress.c
@@ -817,7 +817,7 @@ size_t ZSTDMT_decompressDCtx(ZSTDMT_DCtx * ctx, ZSTDMT_RdWr_t * rdwr)
 	/* wait for all workers */
 	for (t = 0; t < ctx->threads; t++) {
 		cwork_t *w = &ctx->cwork[t];
-		void *p;
+		void *p = 0;
 		pthread_join(w->pthread, &p);
 		if (p)
 			retval_of_thread = p;
diff --git a/windows/Makefile b/windows/Makefile
index 9e860ed..463faec 100644
--- a/windows/Makefile
+++ b/windows/Makefile
@@ -1,13 +1,15 @@
 
 CROSS	= i686-w64-mingw32-
+#CROSS	= x86_64-w64-mingw32-
 CC	= $(CROSS)gcc
-STRIP	= $(CROSS)strip
 RANLIB	= $(CROSS)ranlib
-#CC	= clang
 
-CFLAGS	= -W -pthread -Wall -pipe
-CFLAGS	= -fomit-frame-pointer
+STRIP	= $(CROSS)strip
+SFLAGS	= -R .note -R .comment
+
 LDFLAGS	= -lpthread
+CFLAGS	= -W -pthread -Wall -pipe -flto
+CFLAGS	+= -fomit-frame-pointer
 
 #CFLAGS += -DDEBUGME
 #CFLAGS += -g
@@ -17,16 +19,16 @@ CFLAGS += -O3
 #CFLAGS += -Wno-unused-variable
 #CFLAGS += -Wno-unused-function
 
-PRGS	= lz4mt lz5mt zstdmt
+PRGS	= lz4mt.exe lz5mt.exe zstdmt.exe
 
 all:	loadsource $(PRGS)
 again:	clean $(PRGS)
 
 ZSTDMTDIR = ../lib
 
-LIBLZ4	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/lz4mt_common.c $(ZSTDMTDIR)/lz4mt_compress.c $(ZSTDMTDIR)/lz4mt_decompress.c
-LIBLZ5	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/lz5mt_common.c $(ZSTDMTDIR)/lz5mt_compress.c $(ZSTDMTDIR)/lz5mt_decompress.c
-LIBZSTD	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/zstdmt_common.c $(ZSTDMTDIR)/zstdmt_compress.c $(ZSTDMTDIR)/zstdmt_decompress.c
+LIBLZ4	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/lz4mt_common.c $(ZSTDMTDIR)/lz4mt_compress.c $(ZSTDMTDIR)/lz4mt_decompress.c lz4mt.c
+LIBLZ5	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/lz5mt_common.c $(ZSTDMTDIR)/lz5mt_compress.c $(ZSTDMTDIR)/lz5mt_decompress.c lz5mt.c
+LIBZSTD	= $(ZSTDMTDIR)/threading.c $(ZSTDMTDIR)/zstdmt_common.c $(ZSTDMTDIR)/zstdmt_compress.c $(ZSTDMTDIR)/zstdmt_decompress.c zstdmt.c
 
 LZ4DIR	= lz4/lib
 LIBLZ4	+= $(LZ4DIR)/lz4.c $(LZ4DIR)/lz4frame.c $(LZ4DIR)/lz4hc.c $(LZ4DIR)/xxhash.c
@@ -54,17 +56,17 @@ loadsource:
 	test -d lz5  || git clone https://github.com/inikep/lz5    -b v1.5   --depth=1 lz5
 	test -d zstd || git clone https://github.com/facebook/zstd -b v1.1.3 --depth=1 zstd
 
-lz4mt: lz4mt.o
-	$(CC) $(CF_LZ4) $(LDFLAGS) -o $@ $(LIBLZ4) lz4mt.o
-	$(STRIP) $@
+lz4mt.exe:
+	$(CC) $(CF_LZ4) $(CDFLAGS) $(LDFLAGS) -o $@ $(LIBLZ4)
+	$(STRIP) $(SFLAGS) $@
 
-lz5mt: lz5mt.o
-	$(CC) $(CF_LZ5) $(LDFLAGS) -o $@ $(LIBLZ5) lz5mt.o
-	$(STRIP) $@
+lz5mt.exe:
+	$(CC) $(CF_LZ5) $(CDFLAGS) $(LDFLAGS) -o $@ $(LIBLZ5)
+	$(STRIP) $(SFLAGS) $@
 
-zstdmt: zstdmt.o
-	$(CC) $(CF_ZSTD) $(LDFLAGS) -o $@ $(LIBZSTD) zstdmt.o
-	$(STRIP) $@
+zstdmt.exe:
+	$(CC) $(CF_ZSTD) $(CDFLAGS) $(LDFLAGS) -o $@ $(LIBZSTD)
+	$(STRIP) $(SFLAGS) $@
 
 clean:
 	rm -f $(PRGS) *.o *.a