diff --git a/zlibWrapper/Makefile b/zlibWrapper/Makefile
index a61980c2..4ef18028 100644
--- a/zlibWrapper/Makefile
+++ b/zlibWrapper/Makefile
@@ -70,35 +70,34 @@ valgrindTest: clean example fitblk example_zstd fitblk_zstd zwrapbench
 	$(VALGRIND) ./zwrapbench -rqi1b1e5 ../lib ../programs ../tests
 
 #.c.o:
-#	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<
+#	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
 
-minigzip: $(EXAMPLE_PATH)/minigzip.o $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
+minigzip: $(EXAMPLE_PATH)/minigzip.o zstd_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZSTDLIBRARY) $(ZLIB_LIBRARY) -o $@
 
-minigzip_zstd: $(EXAMPLE_PATH)/minigzip.o $(ZLIBWRAPPER_PATH)/zstdTurnedOn_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
+minigzip_zstd: $(EXAMPLE_PATH)/minigzip.o zstdTurnedOn_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZSTDLIBRARY) $(ZLIB_LIBRARY) -o $@
 
-example: $(EXAMPLE_PATH)/example.o $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
+example: $(EXAMPLE_PATH)/example.o zstd_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZLIB_LIBRARY) -o $@
 
-example_zstd: $(EXAMPLE_PATH)/example.o $(ZLIBWRAPPER_PATH)/zstdTurnedOn_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
+example_zstd: $(EXAMPLE_PATH)/example.o zstdTurnedOn_zlibwrapper.o $(GZFILES) $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZLIB_LIBRARY) -o $@
 
-fitblk: $(EXAMPLE_PATH)/fitblk.o $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.o $(ZSTDLIBRARY)
+fitblk: $(EXAMPLE_PATH)/fitblk.o zstd_zlibwrapper.o $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZLIB_LIBRARY) -o $@
 
-fitblk_zstd: $(EXAMPLE_PATH)/fitblk.o $(ZLIBWRAPPER_PATH)/zstdTurnedOn_zlibwrapper.o $(ZSTDLIBRARY)
+fitblk_zstd: $(EXAMPLE_PATH)/fitblk.o zstdTurnedOn_zlibwrapper.o $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZLIB_LIBRARY) -o $@
 
-zwrapbench: $(EXAMPLE_PATH)/zwrapbench.o $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.o $(PROGRAMS_PATH)/util.o $(PROGRAMS_PATH)/timefn.o $(PROGRAMS_PATH)/datagen.o $(ZSTDLIBRARY)
+zwrapbench: $(EXAMPLE_PATH)/zwrapbench.o zstd_zlibwrapper.o $(PROGRAMS_PATH)/util.o $(PROGRAMS_PATH)/timefn.o $(PROGRAMS_PATH)/datagen.o $(ZSTDLIBRARY)
 	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $^ $(ZLIB_LIBRARY) -o $@
 
 
-$(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.o: $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.h
-	$(CC) $(CFLAGS) $(CPPFLAGS) -I. -c -o $@ $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c
+zstd_zlibwrapper.o: $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.h
 
-$(ZLIBWRAPPER_PATH)/zstdTurnedOn_zlibwrapper.o: $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.h
-	$(CC) $(CFLAGS) $(CPPFLAGS) -DZWRAP_USE_ZSTD=1 -I. -c -o $@ $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c
+zstdTurnedOn_zlibwrapper.o: CPPFLAGS += -DZWRAP_USE_ZSTD=1
+zstdTurnedOn_zlibwrapper.o: $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.c $(ZLIBWRAPPER_PATH)/zstd_zlibwrapper.h
 
 $(ZSTDLIBDIR)/libzstd.a:
 	$(MAKE) -C $(ZSTDLIBDIR) libzstd.a
diff --git a/zlibWrapper/examples/fitblk.c b/zlibWrapper/examples/fitblk.c
index 6b587cee..669b176e 100644
--- a/zlibWrapper/examples/fitblk.c
+++ b/zlibWrapper/examples/fitblk.c
@@ -159,7 +159,7 @@ int main(int argc, char **argv)
     if (ZWRAP_isUsingZSTDcompression()) printf("zstd version %s\n", zstdVersion());
 
     /* allocate memory for buffers and compression engine */
-    blk = malloc(size + EXCESS);
+    blk = (unsigned char*)malloc(size + EXCESS);
     def.zalloc = Z_NULL;
     def.zfree = Z_NULL;
     def.opaque = Z_NULL;
@@ -200,7 +200,7 @@ int main(int argc, char **argv)
     inf.avail_in = 0;
     inf.next_in = Z_NULL;
     ret = inflateInit(&inf);
-    tmp = malloc(size + EXCESS);
+    tmp = (unsigned char*)malloc(size + EXCESS);
     if (ret != Z_OK || tmp == NULL)
         quit("out of memory");
     ret = deflateReset(&def);
diff --git a/zlibWrapper/examples/zwrapbench.c b/zlibWrapper/examples/zwrapbench.c
index 61031b9d..35893a4b 100644
--- a/zlibWrapper/examples/zwrapbench.c
+++ b/zlibWrapper/examples/zwrapbench.c
@@ -311,14 +311,14 @@ static int BMK_benchMem(z_const void* srcBuffer, size_t srcSize,
                                 ret = deflateReset(&def);
                             if (ret != Z_OK) EXM_THROW(1, "deflateReset failure");
                             if (useSetDict) {
-                                ret = deflateSetDictionary(&def, dictBuffer, dictBufferSize);
+                                ret = deflateSetDictionary(&def, (const z_Bytef*)dictBuffer, dictBufferSize);
                                 if (ret != Z_OK) EXM_THROW(1, "deflateSetDictionary failure");
                                 if (ZWRAP_isUsingZSTDcompression()) useSetDict = 0; /* zstd doesn't require deflateSetDictionary after ZWRAP_deflateReset_keepDict */
                             }
-                            def.next_in = (z_const void*) blockTable[blockNb].srcPtr;
+                            def.next_in = (z_const z_Bytef*) blockTable[blockNb].srcPtr;
                             def.avail_in = (uInt)blockTable[blockNb].srcSize;
                             def.total_in = 0;
-                            def.next_out = (void*) blockTable[blockNb].cPtr;
+                            def.next_out = (z_Bytef*) blockTable[blockNb].cPtr;
                             def.avail_out = (uInt)blockTable[blockNb].cRoom;
                             def.total_out = 0;
                             ret = deflate(&def, Z_FINISH);
@@ -343,13 +343,13 @@ static int BMK_benchMem(z_const void* srcBuffer, size_t srcSize,
                             ret = deflateInit(&def, cLevel);
                             if (ret != Z_OK) EXM_THROW(1, "deflateInit failure");
                             if (dictBuffer) {
-                                ret = deflateSetDictionary(&def, dictBuffer, dictBufferSize);
+                                ret = deflateSetDictionary(&def, (const z_Bytef*)dictBuffer, dictBufferSize);
                                 if (ret != Z_OK) EXM_THROW(1, "deflateSetDictionary failure");
                             }
-                            def.next_in = (z_const void*) blockTable[blockNb].srcPtr;
+                            def.next_in = (z_const z_Bytef*) blockTable[blockNb].srcPtr;
                             def.avail_in = (uInt)blockTable[blockNb].srcSize;
                             def.total_in = 0;
-                            def.next_out = (void*) blockTable[blockNb].cPtr;
+                            def.next_out = (z_Bytef*) blockTable[blockNb].cPtr;
                             def.avail_out = (uInt)blockTable[blockNb].cRoom;
                             def.total_out = 0;
                             ret = deflate(&def, Z_FINISH);
@@ -451,15 +451,15 @@ static int BMK_benchMem(z_const void* srcBuffer, size_t srcSize,
                             else
                                 ret = inflateReset(&inf);
                             if (ret != Z_OK) EXM_THROW(1, "inflateReset failure");
-                            inf.next_in = (z_const void*) blockTable[blockNb].cPtr;
+                            inf.next_in = (z_const z_Bytef*) blockTable[blockNb].cPtr;
                             inf.avail_in = (uInt)blockTable[blockNb].cSize;
                             inf.total_in = 0;
-                            inf.next_out = (void*) blockTable[blockNb].resPtr;
+                            inf.next_out = (z_Bytef*) blockTable[blockNb].resPtr;
                             inf.avail_out = (uInt)blockTable[blockNb].srcSize;
                             inf.total_out = 0;
                             ret = inflate(&inf, Z_FINISH);
                             if (ret == Z_NEED_DICT) {
-                                ret = inflateSetDictionary(&inf, dictBuffer, dictBufferSize);
+                                ret = inflateSetDictionary(&inf, (const z_Bytef*)dictBuffer, dictBufferSize);
                                 if (ret != Z_OK) EXM_THROW(1, "inflateSetDictionary failure");
                                 ret = inflate(&inf, Z_FINISH);
                             }
@@ -483,15 +483,15 @@ static int BMK_benchMem(z_const void* srcBuffer, size_t srcSize,
                             inf.opaque = Z_NULL;
                             ret = inflateInit(&inf);
                             if (ret != Z_OK) EXM_THROW(1, "inflateInit failure");
-                            inf.next_in = (z_const void*) blockTable[blockNb].cPtr;
+                            inf.next_in = (z_const z_Bytef*) blockTable[blockNb].cPtr;
                             inf.avail_in = (uInt)blockTable[blockNb].cSize;
                             inf.total_in = 0;
-                            inf.next_out = (void*) blockTable[blockNb].resPtr;
+                            inf.next_out = (z_Bytef*) blockTable[blockNb].resPtr;
                             inf.avail_out = (uInt)blockTable[blockNb].srcSize;
                             inf.total_out = 0;
                             ret = inflate(&inf, Z_FINISH);
                             if (ret == Z_NEED_DICT) {
-                                ret = inflateSetDictionary(&inf, dictBuffer, dictBufferSize);
+                                ret = inflateSetDictionary(&inf, (const z_Bytef*) dictBuffer, dictBufferSize);
                                 if (ret != Z_OK) EXM_THROW(1, "inflateSetDictionary failure");
                                 ret = inflate(&inf, Z_FINISH);
                             }
diff --git a/zlibWrapper/zstd_zlibwrapper.c b/zlibWrapper/zstd_zlibwrapper.c
index d07ed953..cb6afa78 100644
--- a/zlibWrapper/zstd_zlibwrapper.c
+++ b/zlibWrapper/zstd_zlibwrapper.c
@@ -99,7 +99,7 @@ typedef struct {
     unsigned long long pledgedSrcSize;
 } ZWRAP_CCtx;
 
-typedef ZWRAP_CCtx internal_state;
+/* typedef ZWRAP_CCtx internal_state; */
 
 
 
@@ -513,7 +513,7 @@ static int ZWRAPD_finishWithErrorMsg(z_streamp strm, char* message)
 
 
 ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm,
-                                     const char *version, int stream_size))
+                                     const char* version, int stream_size))
 {
     if (g_ZWRAPdecompressionType == ZWRAP_FORCE_ZLIB) {
         strm->reserved = ZWRAP_ZLIB_STREAM;
@@ -524,7 +524,7 @@ ZEXTERN int ZEXPORT z_inflateInit_ OF((z_streamp strm,
         LOG_WRAPPERD("- inflateInit\n");
         if (zwd == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
 
-        zwd->version = ZSTD_malloc(strlen(version)+1, zwd->customMem);
+        zwd->version = (char*)ZSTD_malloc(strlen(version)+1, zwd->customMem);
         if (zwd->version == NULL) return ZWRAPD_finishWithError(zwd, strm, 0);
         strcpy(zwd->version, version);