diff --git a/supportApp/GraphicsMagickSrc/Magick++/lib/Makefile b/supportApp/GraphicsMagickSrc/Magick++/lib/Makefile
index 60d78e04..d3d26c27 100644
--- a/supportApp/GraphicsMagickSrc/Magick++/lib/Makefile
+++ b/supportApp/GraphicsMagickSrc/Magick++/lib/Makefile
@@ -26,6 +26,10 @@ ifeq ($(WITH_GRAPHICSMAGICK),YES)
     ifeq ($(GRAPHICSMAGICK_PREFIX_SYMBOLS),YES)
       USR_CXXFLAGS += -DPREFIX_MAGICK_SYMBOLS
     endif
+    ifeq (mingw, $(findstring mingw, $(T_A)))
+      # multiple definition of `_Unwind_Resume on Linux. I don't know how to fix it.
+      USR_LDFLAGS += -Wl,-allow-multiple-definition
+    endif
     
     USR_INCLUDES += -I$(TOP)/supportApp/GraphicsMagickSrc
     USR_INCLUDES += -I$(TOP)/supportApp/GraphicsMagickSrc/lcms/include
diff --git a/supportApp/GraphicsMagickSrc/coders/Makefile b/supportApp/GraphicsMagickSrc/coders/Makefile
index cdc95d7f..ebecc99d 100644
--- a/supportApp/GraphicsMagickSrc/coders/Makefile
+++ b/supportApp/GraphicsMagickSrc/coders/Makefile
@@ -204,7 +204,7 @@ ifeq ($(WITH_GRAPHICSMAGICK),YES)
       endif
     endif
 
-    LIB_SYS_LIBS_WIN32 += User32 Gdi32 OleAut32
+    LIB_SYS_LIBS_WIN32 += user32 gdi32 oleaut32
 
   endif # ($(GRAPHICSMAGICK_EXTERNAL),NO)
 endif # ($(WITH_GRAPHICSMAGICK),YES)
diff --git a/supportApp/GraphicsMagickSrc/magick/Makefile b/supportApp/GraphicsMagickSrc/magick/Makefile
index 952f26e9..819c917a 100644
--- a/supportApp/GraphicsMagickSrc/magick/Makefile
+++ b/supportApp/GraphicsMagickSrc/magick/Makefile
@@ -209,7 +209,7 @@ ifeq ($(WITH_GRAPHICSMAGICK),YES)
       endif
     endif
     
-    LIB_SYS_LIBS_WIN32 += Advapi32 User32 Gdi32
+    LIB_SYS_LIBS_WIN32 += advapi32 user32 gdi32
     LIB_SYS_LIBS_Linux += Xext
 
   endif # ($(GRAPHICSMAGICK_EXTERNAL),NO)
diff --git a/supportApp/GraphicsMagickSrc/ttf/Makefile b/supportApp/GraphicsMagickSrc/ttf/Makefile
index 12287669..7be94f10 100644
--- a/supportApp/GraphicsMagickSrc/ttf/Makefile
+++ b/supportApp/GraphicsMagickSrc/ttf/Makefile
@@ -1,7 +1,6 @@
 TOP = ../../..
 include $(TOP)/configure/CONFIG
 
-DIRS += builds
 DIRS += src
 
 include $(TOP)/configure/RULES_DIRS
diff --git a/supportApp/bloscSrc/blosc/blosc.c b/supportApp/bloscSrc/blosc/blosc.c
index d858c517..6d82fb19 100644
--- a/supportApp/bloscSrc/blosc/blosc.c
+++ b/supportApp/bloscSrc/blosc/blosc.c
@@ -54,7 +54,7 @@
   #include <inttypes.h>
 #endif  /* _WIN32 */
 
-#if defined(_WIN32) && !defined(__GNUC__)
+#if defined(_WIN32)
   #include "win32/pthread.h"
   #include "win32/pthread.c"
 #else
diff --git a/supportApp/hdf5Src/H5win32defs.h b/supportApp/hdf5Src/H5win32defs.h
index 0149faa9..6ead9217 100644
--- a/supportApp/hdf5Src/H5win32defs.h
+++ b/supportApp/hdf5Src/H5win32defs.h
@@ -78,13 +78,16 @@ typedef __int64             h5_stat_size_t;
  */
 #define HDmemset(X,C,Z)     memset((void*)(X),C,Z)
 
+#ifndef _TIMEZONE_DEFINED
+#define _TIMEZONE_DEFINED
 struct timezone {
     int tz_minuteswest;
     int tz_dsttime;
 };
+#endif
 
 /* time.h before VS2015 does not include timespec */
-#if (_MSC_VER < 1900)
+#if defined (_MSC_VER) && (_MSC_VER < 1900)
 struct timespec
 {
     time_t tv_sec;  /* Seconds - >= 0 */
diff --git a/supportApp/xml2Src/os/default/libxml/xmlexports.h b/supportApp/xml2Src/os/default/libxml/xmlexports.h
index 2c79f814..99b1f317 100644
--- a/supportApp/xml2Src/os/default/libxml/xmlexports.h
+++ b/supportApp/xml2Src/os/default/libxml/xmlexports.h
@@ -51,7 +51,7 @@
 /** DOC_DISABLE */
 
 /* Windows platform with MS compiler */
-#if defined(_WIN32) && defined(_MSC_VER)
+#if defined(_WIN32) && (defined(_MSC_VER) || defined(__MINGW32__))
   #undef XMLPUBFUN
   #undef XMLPUBVAR
   #undef XMLCALL
@@ -60,10 +60,11 @@
     #define XMLPUBFUN __declspec(dllexport)
     #define XMLPUBVAR __declspec(dllexport)
   #else
-    #define XMLPUBFUN
     #if !defined(LIBXML_STATIC)
       #define XMLPUBVAR __declspec(dllimport) extern
+      #define XMLPUBFUN __declspec(dllimport)
     #else
+      #define XMLPUBFUN
       #define XMLPUBVAR extern
     #endif
   #endif
@@ -102,35 +103,6 @@
   #endif
 #endif
 
-/* Windows platform with GNU compiler (Mingw) */
-#if defined(_WIN32) && defined(__MINGW32__)
-  #undef XMLPUBFUN
-  #undef XMLPUBVAR
-  #undef XMLCALL
-  #undef XMLCDECL
-  /*
-   * if defined(IN_LIBXML) this raises problems on mingw with msys
-   * _imp__xmlFree listed as missing. Try to workaround the problem
-   * by also making that declaration when compiling client code.
-   */
-  #if defined(IN_LIBXML) && !defined(LIBXML_STATIC)
-    #define XMLPUBFUN __declspec(dllexport)
-    #define XMLPUBVAR __declspec(dllexport) extern
-  #else
-    #define XMLPUBFUN
-    #if !defined(LIBXML_STATIC)
-      #define XMLPUBVAR __declspec(dllimport) extern
-    #else
-      #define XMLPUBVAR extern
-    #endif
-  #endif
-  #define XMLCALL __cdecl
-  #define XMLCDECL __cdecl
-  #if !defined _REENTRANT
-    #define _REENTRANT
-  #endif
-#endif
-
 /* Cygwin platform, GNU compiler */
 #if defined(_WIN32) && defined(__CYGWIN__)
   #undef XMLPUBFUN
diff --git a/supportApp/xml2Src/xmllint.c b/supportApp/xml2Src/xmllint.c
index 67f7adb2..79ac0159 100644
--- a/supportApp/xml2Src/xmllint.c
+++ b/supportApp/xml2Src/xmllint.c
@@ -6,6 +6,7 @@
  * daniel@veillard.com
  */
 
+#define IN_LIBXML
 #include "libxml.h"
 
 #include <string.h>