Build Win64 Erlang emulator using MSYS

Still does not run, just compiles.

41 files changed, 1673 insertions, 199 deletions

diff --git a/erts/aclocal.m4 b/erts/aclocal.m4
index ea5cc67fbe..764c578dae 100644
--- a/erts/aclocal.m4
+++ b/erts/aclocal.m4
@@ -112,6 +112,94 @@ fi
 
 dnl ----------------------------------------------------------------------
 dnl
+dnl LM_WINDOWS_ENVIRONMENT
+dnl
+dnl
+dnl Tries to determine thw windows build environment, i.e. 
+dnl MIXED_CYGWIN_VC or MIXED_MSYS_VC 
+dnl
+
+AC_DEFUN(LM_WINDOWS_ENVIRONMENT,
+[
+MIXED_CYGWIN=no
+MIXED_MSYS=no
+
+AC_MSG_CHECKING(for mixed cygwin or msys and native VC++ environment)
+if test "X$host" = "Xwin32" -a "x$GCC" != "xyes"; then
+	if test -x /usr/bin/cygpath; then
+		CFLAGS="-O2"
+		MIXED_CYGWIN=yes
+		AC_MSG_RESULT([Cygwin and VC])
+		MIXED_CYGWIN_VC=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
+	elif test -x /usr/bin/i686-pc-msys-gcc.exe; then
+	        CFLAGS="-O2"
+		MIXED_MSYS=yes
+		AC_MSG_RESULT([MSYS and VC])
+		MIXED_MSYS_VC=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MSYS_VC"
+	else		    
+		AC_MSG_RESULT([undeterminable])
+		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
+	fi
+else
+	AC_MSG_RESULT([no])
+	MIXED_CYGWIN_VC=no
+	MIXED_MSYS_VC=no
+fi
+AC_SUBST(MIXED_CYGWIN_VC)
+AC_SUBST(MIXED_MSYS_VC)
+
+MIXED_VC=no
+if test "x$MIXED_MSYS_VC" != "xyes" -o  "x$MIXED_CYGWIN_VC" != "xyes" ; then
+   MIXED_VC=yes
+fi
+
+AC_SUBST(MIXED_VC)
+
+if test "x$MIXED_MSYS" != "xyes"; then
+   AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
+   if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
+	if test -x /usr/bin/cygpath; then
+		CFLAGS="-O2"
+		MIXED_CYGWIN=yes
+		AC_MSG_RESULT([yes])
+		MIXED_CYGWIN_MINGW=yes
+		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
+	else
+		AC_MSG_RESULT([undeterminable])
+		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
+	fi
+    else
+	AC_MSG_RESULT([no])
+	MIXED_CYGWIN_MINGW=no
+    fi
+else
+	MIXED_CYGWIN_MINGW=no
+fi	
+AC_SUBST(MIXED_CYGWIN_MINGW)
+
+AC_MSG_CHECKING(if we mix cygwin with any native compiler)
+if test "X$MIXED_CYGWIN" = "Xyes"; then
+	AC_MSG_RESULT([yes])	
+else
+	AC_MSG_RESULT([no])
+fi
+
+AC_SUBST(MIXED_CYGWIN)
+	
+AC_MSG_CHECKING(if we mix msys with another native compiler)
+if test "X$MIXED_MSYS" = "Xyes" ; then
+	AC_MSG_RESULT([yes])	
+else
+	AC_MSG_RESULT([no])
+fi
+
+AC_SUBST(MIXED_MSYS)
+])		
+	
+dnl ----------------------------------------------------------------------
+dnl
 dnl LM_FIND_EMU_CC
 dnl
 dnl
diff --git a/erts/configure.in b/erts/configure.in
index 10d303e241..8798adf3a5 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -387,8 +387,8 @@ case $host_os in
 	# otherwise since we pass it a 32-bit value).
 	#
 	# FIXME: Use time_t all the way and remove _USE_32BIT_TIME_T.
-	AC_MSG_WARN([Reverting to 32-bit time_t])
-	CPPFLAGS="$CPPFLAGS -D_USE_32BIT_TIME_T"
+	# AC_MSG_WARN([Reverting to 32-bit time_t])
+	# CPPFLAGS="$CPPFLAGS -D_USE_32BIT_TIME_T"
 	;;
     darwin*)
         CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE"
@@ -398,53 +398,7 @@ case $host_os in
 esac
 
 
-
-MIXED_CYGWIN=no
-
-AC_MSG_CHECKING(for mixed cygwin and native VC++ environment)
-if test "X$host" = "Xwin32" -a "x$GCC" != x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_VC=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-
-AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
-if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_MINGW=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_MINGW=no
-fi
-AC_SUBST(MIXED_CYGWIN_MINGW)
-
-AC_MSG_CHECKING(if we mix cygwin with any native compiler)
-if test "X$MIXED_CYGWIN" = "Xyes" ; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
-fi
-
-AC_SUBST(MIXED_CYGWIN)
+LM_WINDOWS_ENVIRONMENT
 	
 dnl
 dnl Flags to the C compiler
@@ -2584,7 +2538,7 @@ static void new_fp_exception(void)
  * Implement unmask_fpe() and check_fpe() based on CPU/OS combination
  */
 
-#if (defined(__i386__) || defined(__x86_64__)) && defined(__GNUC__) && !defined(__CYGWIN__)
+#if (defined(__i386__) || defined(__x86_64__)) && defined(__GNUC__) && !defined(__CYGWIN__) && !defined(__MINGW32__)
 
 static void unmask_x87(void)
 {
@@ -3637,7 +3591,7 @@ elif test "x$with_ssl_zlib" = "xyes" || test "x$with_ssl_zlib" = "x"; then
 		AC_MSG_WARN([Cannot search for zlib; missing cross system root (erl_xcomp_sysroot).])
 		SSL_LINK_WITH_ZLIB=no	
 		STATIC_ZLIB_LIBS=	
-	elif  test "x$MIXED_CYGWIN" = "xyes"; then
+	elif  test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
 		SSL_LINK_WITH_ZLIB=no	
 		STATIC_ZLIB_LIBS=	
 	else
@@ -3766,6 +3720,20 @@ case "$erl_xcomp_without_sysroot-$with_ssl" in
 			extra_dir=`cygpath $ssl_install_dir`
 		fi
 	fi
+    elif test "x$MIXED_MSYS" = "xyes"; then
+    	AC_CHECK_PROG(REGTOOL, reg_query.sh, reg_query.sh, false)
+	if test "$ac_cv_prog_REGTOOL" != false; then
+	   	if test "x$ARCH" = "xamd64"; then
+		   rp="HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/OpenSSL (64-bit)_is1"
+		else
+		   rp="HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/OpenSSL_is1"
+		fi	
+		key="Inno Setup: App Path"
+		if "$ac_cv_prog_REGTOOL" "$rp" "$key" > /dev/null; then
+			ssl_install_dir=`"$ac_cv_prog_REGTOOL" "$rp" "$key"`
+			extra_dir=`win2msys_path.sh "$ssl_install_dir"`
+		fi
+	fi
     fi
     # We search for OpenSSL in the common OS standard locations.
     SSL_APP=ssl
@@ -3781,7 +3749,7 @@ case "$erl_xcomp_without_sysroot-$with_ssl" in
 	if test -f "$erl_xcomp_isysroot$rdir/include/openssl/opensslv.h"; then
 		is_real_ssl=yes
 		SSL_ROOT="$dir"
-		if test "x$MIXED_CYGWIN" = "xyes" ; then
+		if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
 			if test -f "$dir/lib/VC/libeay32.lib"; then
 				SSL_RUNTIME_LIBDIR="$rdir/lib/VC"
 				SSL_LIBDIR="$dir/lib/VC"
@@ -3856,7 +3824,7 @@ case "$erl_xcomp_without_sysroot-$with_ssl" in
          		])
          		CPPFLAGS=$old_CPPFLAGS
 			if test "x$ssl_found" = "xyes"; then
-			   	if test "x$MIXED_CYGWIN" = "xyes" ; then
+			   	if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
 				   	ssl_linkable=yes
 				else
 					saveCFLAGS="$CFLAGS"
@@ -3968,7 +3936,7 @@ dnl		so it is - be adoptable
     SSL_ROOT="$with_ssl"
     SSL_CRYPTO_LIBNAME=crypto
     SSL_SSL_LIBNAME=ssl
-    if test "x$MIXED_CYGWIN" = "xyes" && test -d "$with_ssl/lib/VC"; then
+    if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes" && test -d "$with_ssl/lib/VC"; then
 	if test -f "$with_ssl/lib/VC/libeay32.lib"; then
 	    SSL_LIBDIR="$with_ssl/lib/VC"
 	    SSL_CRYPTO_LIBNAME=libeay32
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index 289d5e2a9d..a5d8217545 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -198,6 +198,7 @@ RM	= @RM@
 MKDIR	= @MKDIR@
 
 USING_MINGW=@MIXED_CYGWIN_MINGW@
+MIXED_MSYS=@MIXED_MSYS@
 
 ifeq ($(TARGET),win32)
 LIB_PREFIX=
@@ -237,9 +238,12 @@ ifeq ($(TARGET), win32)
 GEN_OPT_FLGS = $(OPT_LEVEL)
 UNROLL_FLG = 
 RC=rc.sh
+ifeq ($(MIXED_MSYS), yes)
+MAKE_PRELOAD_EXTRA = -msys
+endif
 ifeq ($(USING_MINGW), yes)
-RES_EXT=@OBJEXT@
-MAKE_PRELOAD_EXTRA=-windres
+RES_EXT = @OBJEXT@
+MAKE_PRELOAD_EXTRA += " -windres"
 else
 RES_EXT=res
 endif
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 740a1b853e..2d69fd9a97 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -744,7 +744,8 @@ int enif_get_int(ErlNifEnv* env, Eterm term, int* ip)
 {
 #if SIZEOF_INT ==  ERTS_SIZEOF_ETERM
     return term_to_Sint(term, (Sint*)ip);
-#elif SIZEOF_LONG ==  ERTS_SIZEOF_ETERM
+#elif (SIZEOF_LONG ==  ERTS_SIZEOF_ETERM) || \
+  (SIZEOF_LONG_LONG ==  ERTS_SIZEOF_ETERM)
     Sint i;
     if (!term_to_Sint(term, &i) || i < INT_MIN || i > INT_MAX) {
 	return 0;
@@ -760,7 +761,8 @@ int enif_get_uint(ErlNifEnv* env, Eterm term, unsigned* ip)
 {
 #if SIZEOF_INT == ERTS_SIZEOF_ETERM
     return term_to_Uint(term, (Uint*)ip);
-#elif SIZEOF_LONG == ERTS_SIZEOF_ETERM
+#elif (SIZEOF_LONG == ERTS_SIZEOF_ETERM) || \
+  (SIZEOF_LONG_LONG ==  ERTS_SIZEOF_ETERM)
     Uint i;
     if (!term_to_Uint(term, &i) || i > UINT_MAX) {
 	return 0;
@@ -776,6 +778,13 @@ int enif_get_long(ErlNifEnv* env, Eterm term, long* ip)
     return term_to_Sint(term, ip);
 #elif SIZEOF_LONG == 8
     return term_to_Sint64(term, ip);
+#elif SIZEOF_LONG == SIZEOF_INT
+    int tmp,ret;
+    ret = enif_get_int(env,term,&tmp);
+    if (ret) {
+      *ip = (long) tmp;
+    }
+    return ret;
 #else
 #  error Unknown long word size 
 #endif     
@@ -787,6 +796,14 @@ int enif_get_ulong(ErlNifEnv* env, Eterm term, unsigned long* ip)
     return term_to_Uint(term, ip);
 #elif SIZEOF_LONG == 8
     return term_to_Uint64(term, ip);
+#elif SIZEOF_LONG == SIZEOF_INT
+    int ret;
+    unsigned int tmp;
+    ret = enif_get_uint(env,term,&tmp);
+    if (ret) {
+      *ip = (long) tmp;
+    }
+    return ret;
 #else
 #  error Unknown long word size 
 #endif     
@@ -847,7 +864,8 @@ ERL_NIF_TERM enif_make_int(ErlNifEnv* env, int i)
 {
 #if SIZEOF_INT == ERTS_SIZEOF_ETERM
     return IS_SSMALL(i) ? make_small(i) : small_to_big(i,alloc_heap(env,2));
-#elif SIZEOF_LONG == ERTS_SIZEOF_ETERM
+#elif (SIZEOF_LONG == ERTS_SIZEOF_ETERM) || \
+  (SIZEOF_LONG_LONG == ERTS_SIZEOF_ETERM)
     return make_small(i);
 #endif
 }
@@ -856,7 +874,8 @@ ERL_NIF_TERM enif_make_uint(ErlNifEnv* env, unsigned i)
 {
 #if SIZEOF_INT == ERTS_SIZEOF_ETERM
     return IS_USMALL(0,i) ? make_small(i) : uint_to_big(i,alloc_heap(env,2));
-#elif SIZEOF_LONG == ERTS_SIZEOF_ETERM
+#elif (SIZEOF_LONG ==  ERTS_SIZEOF_ETERM) || \
+  (SIZEOF_LONG_LONG ==  ERTS_SIZEOF_ETERM)
     return make_small(i);
 #endif
 }
@@ -868,6 +887,8 @@ ERL_NIF_TERM enif_make_long(ErlNifEnv* env, long i)
     }
 #if SIZEOF_LONG == ERTS_SIZEOF_ETERM
     return small_to_big(i, alloc_heap(env,2));
+#elif SIZEOF_LONG_LONG ==  ERTS_SIZEOF_ETERM
+    return make_small(i);
 #elif SIZEOF_LONG == 8
     ensure_heap(env,3);
     return erts_sint64_to_big(i, &env->hp);
@@ -881,6 +902,8 @@ ERL_NIF_TERM enif_make_ulong(ErlNifEnv* env, unsigned long i)
     }
 #if SIZEOF_LONG == ERTS_SIZEOF_ETERM
     return uint_to_big(i,alloc_heap(env,2));
+#elif SIZEOF_LONG_LONG ==  ERTS_SIZEOF_ETERM
+    return make_small(i);
 #elif SIZEOF_LONG == 8
     ensure_heap(env,3);
     return erts_uint64_to_big(i, &env->hp);    
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index fea527f954..e5d99dc4f1 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -87,7 +87,11 @@ typedef long long ErlNifSInt64;
 typedef unsigned int ERL_NIF_TERM;
 #else
 #  define ERL_NIF_VM_VARIANT "beam.vanilla" 
+#  if SIZEOF_LONG == SIZEOF_VOID_P
 typedef unsigned long ERL_NIF_TERM;
+#  elif SIZEOF_LONG_LONG == SIZEOF_VOID_P
+typedef unsigned long long ERL_NIF_TERM;
+#  endif
 #endif
 
 struct enif_environment_t;
diff --git a/erts/emulator/beam/erl_node_container_utils.h b/erts/emulator/beam/erl_node_container_utils.h
index 2c67e781e0..e9d7860d42 100644
--- a/erts/emulator/beam/erl_node_container_utils.h
+++ b/erts/emulator/beam/erl_node_container_utils.h
@@ -176,7 +176,7 @@ extern int erts_use_r9_pids_ports;
  * 32-bit CPU.
  */
 
-#define ERTS_MAX_PROCESSES ((1L << 27)-1)
+#define ERTS_MAX_PROCESSES ((1LL << 27)-1)
 #if (ERTS_MAX_PROCESSES > MAX_SMALL)
 # error "The maximum number of processes must fit in a SMALL."
 #endif
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index bc20b2d798..b048adf39c 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -253,8 +253,8 @@ _ET_DECLARE_CHECKED(Eterm*,list_val,Wterm)
 #define SMALL_BITS	(28)
 #define SMALL_DIGITS	(8)
 #endif
-#define MAX_SMALL	((1L << (SMALL_BITS-1))-1)
-#define MIN_SMALL	(-(1L << (SMALL_BITS-1)))
+#define MAX_SMALL	((UWORD_CONSTANT(1) << (SMALL_BITS-1))-1)
+#define MIN_SMALL	(-(1LL << (SMALL_BITS-1)))
 #define make_small(x)	(((Uint)(x) << _TAG_IMMED1_SIZE) + _TAG_IMMED1_SMALL)
 #define is_small(x)	(((x) & _TAG_IMMED1_MASK) == _TAG_IMMED1_SMALL)
 #define is_not_small(x)	(!is_small((x)))
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 94c36c8c59..89955100c6 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -221,7 +221,8 @@ int real_printf(const char *fmt, ...);
 */
 
 #if !((SIZEOF_VOID_P >= 4) && (SIZEOF_VOID_P == SIZEOF_SIZE_T) \
-      && ((SIZEOF_VOID_P == SIZEOF_INT) || (SIZEOF_VOID_P == SIZEOF_LONG)))
+      && ((SIZEOF_VOID_P == SIZEOF_INT) || (SIZEOF_VOID_P == SIZEOF_LONG) || \
+          (SIZEOF_VOID_P == SIZEOF_LONG_LONG)))
 #error Cannot handle this combination of int/long/void*/size_t sizes
 #endif
 
@@ -262,9 +263,18 @@ typedef int          Sint;
 #if SIZEOF_VOID_P == SIZEOF_LONG
 typedef unsigned long UWord;
 typedef long          SWord;
+#define SWORD_CONSTANT(Const) Const##L
+#define UWORD_CONSTANT(Const) Const##UL
 #elif SIZEOF_VOID_P == SIZEOF_INT
 typedef unsigned int UWord;
 typedef int          SWord;
+#define SWORD_CONSTANT(Const) Const
+#define UWORD_CONSTANT(Const) Const##U
+#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG
+typedef unsigned long long UWord;
+typedef long long          SWord;
+#define SWORD_CONSTANT(Const) Const##LL
+#define UWORD_CONSTANT(Const) Const##ULL
 #else
 #error Found no appropriate type to use for 'Eterm', 'Uint' and 'Sint'
 #endif
@@ -275,12 +285,23 @@ typedef int          SWord;
 typedef unsigned long Eterm;
 typedef unsigned long Uint;
 typedef long          Sint;
+#define SWORD_CONSTANT(Const) Const##L
+#define UWORD_CONSTANT(Const) Const##UL
 #define ERTS_SIZEOF_ETERM SIZEOF_LONG
 #elif SIZEOF_VOID_P == SIZEOF_INT
 typedef unsigned int Eterm;
 typedef unsigned int Uint;
 typedef int          Sint;
+#define SWORD_CONSTANT(Const) Const
+#define UWORD_CONSTANT(Const) Const##U
 #define ERTS_SIZEOF_ETERM SIZEOF_INT
+#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG
+typedef unsigned long long Eterm;
+typedef unsigned long long Uint;
+typedef long long          Sint;
+#define SWORD_CONSTANT(Const) Const##LL
+#define UWORD_CONSTANT(Const) Const##ULL
+#define ERTS_SIZEOF_ETERM SIZEOF_LONG_LONG
 #else
 #error Found no appropriate type to use for 'Eterm', 'Uint' and 'Sint'
 #endif
diff --git a/erts/emulator/drivers/win32/ttsl_drv.c b/erts/emulator/drivers/win32/ttsl_drv.c
index fd88dafd34..e636761c67 100644
--- a/erts/emulator/drivers/win32/ttsl_drv.c
+++ b/erts/emulator/drivers/win32/ttsl_drv.c
@@ -21,6 +21,9 @@
  * smart line for output.
  */
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include <ctype.h>
 #include <stdlib.h>
diff --git a/erts/emulator/drivers/win32/win_con.c b/erts/emulator/drivers/win32/win_con.c
index c788ad409d..3daad8bf8b 100644
--- a/erts/emulator/drivers/win32/win_con.c
+++ b/erts/emulator/drivers/win32/win_con.c
@@ -21,6 +21,9 @@
 #define _UNICODE 1
 #include <tchar.h>
 #include <stdio.h>
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include <windowsx.h>
 #include "resource.h"
@@ -34,6 +37,23 @@
 #define REALLOC(X,Y) realloc(X,Y)
 #define FREE(X) free(X)
 
+#if SIZEOF_VOID_P == 8
+#define WIN64 1
+#ifndef GCL_HBRBACKGROUND
+#define GCL_HBRBACKGROUND GCLP_HBRBACKGROUND
+#endif
+#define DIALOG_PROC_RET INT_PTR
+#define CF_HOOK_RET INT_PTR
+#define CC_HOOK_RET INT_PTR
+#define OFN_HOOK_RET INT_PTR
+#else
+#define DIALOG_PROC_RET BOOL
+#define CF_HOOK_RET UINT
+#define CC_HOOK_RET UINT
+#define OFN_HOOK_RET UINT
+#endif
+
+
 #ifndef STATE_SYSTEM_INVISIBLE
 /* Mingw problem with oleacc.h and WIN32_LEAN_AND_MEAN */
 #define STATE_SYSTEM_INVISIBLE 0x00008000
@@ -150,7 +170,7 @@ static TCHAR *erlang_window_title = TEXT("Erlang");
 static unsigned __stdcall ConThreadInit(LPVOID param);
 static LRESULT CALLBACK ClientWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
 static LRESULT CALLBACK FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
-static BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam);
+static DIALOG_PROC_RET CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam);
 static ScreenLine_t *ConNewLine(void);
 static void DeleteTopLine(void);
 static void ensure_line_below(void);
@@ -1608,7 +1628,7 @@ OnEditSelAll(HWND hwnd)
     InvalidateRect(hwnd, NULL, TRUE);
 }
 
-UINT APIENTRY CFHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
+CF_HOOK_RET APIENTRY CFHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
 {
     /* Hook procedure for font dialog box */
     HWND hOwner;
@@ -1626,11 +1646,11 @@ UINT APIENTRY CFHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
         OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
         SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
 		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
-        return 1;
+        return (CF_HOOK_RET) 1;
     default:
         break;
     }
-    return 0;			/* Let the default procedure process the message */
+    return (CF_HOOK_RET) 0; /* Let the default procedure process the message */
 }
 
 static BOOL
@@ -1705,7 +1725,7 @@ ConSetFont(HWND hwnd)
     InvalidateRect(hwnd, NULL, TRUE);
 }
 
-UINT APIENTRY
+CC_HOOK_RET APIENTRY
 CCHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
 {
     /* Hook procedure for choose color dialog box */
@@ -1724,11 +1744,11 @@ CCHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
         OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
         SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
 		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
-        return 1;
+        return (CC_HOOK_RET) 1;
     default:
         break;
     }
-    return 0;			/* Let the default procedure process the message */
+    return (CC_HOOK_RET) 0;			/* Let the default procedure process the message */
 }
 
 void ConChooseColor(HWND hwnd)
@@ -1758,7 +1778,8 @@ void ConChooseColor(HWND hwnd)
     }    
 }
 
-UINT APIENTRY OFNHookProc(HWND hwndDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
+OFN_HOOK_RET APIENTRY OFNHookProc(HWND hwndDlg,UINT iMsg,
+				  WPARAM wParam,LPARAM lParam)
 {
     /* Hook procedure for open file dialog box */
     HWND hOwner,hDlg;
@@ -1777,11 +1798,11 @@ UINT APIENTRY OFNHookProc(HWND hwndDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
         OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
         SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
 		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
-        return 1;
+        return (OFN_HOOK_RET) 1;
     default:
         break;
     }
-    return 0;			/* the let default procedure process the message */
+    return (OFN_HOOK_RET) 0; /* the let default procedure process the message */
 }
 
 static void
@@ -1933,7 +1954,7 @@ write_outbuf(TCHAR *data, int num_chars)
     return num_chars;
 }
 
-BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
+DIALOG_PROC_RET CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
 {
     HWND hOwner;
     RECT rc,rcOwner,rcDlg;
@@ -1953,17 +1974,17 @@ BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
 		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
         SetDlgItemText(hDlg, ID_VERSIONSTRING,
 		       TEXT("Erlang emulator version ") TEXT(ERLANG_VERSION)); 
-        return TRUE;
+        return (DIALOG_PROC_RET) TRUE;
     case WM_COMMAND:
         switch (LOWORD(wParam)) {
         case IDOK:
         case IDCANCEL:
             EndDialog(hDlg,0);
-            return TRUE;
+            return (DIALOG_PROC_RET) TRUE;
         }
         break;
     }
-    return FALSE;
+    return (DIALOG_PROC_RET) FALSE;
 }
 
 static void
diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c
index 931bb196f1..0bc701c4cb 100644
--- a/erts/emulator/drivers/win32/win_efile.c
+++ b/erts/emulator/drivers/win32/win_efile.c
@@ -21,6 +21,9 @@
  */
 
 #include <windows.h>
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include <ctype.h>
 #include <wchar.h>
diff --git a/erts/emulator/sys/win32/erl_win32_sys_ddll.c b/erts/emulator/sys/win32/erl_win32_sys_ddll.c
index a19f49af10..ec51cfea51 100644
--- a/erts/emulator/sys/win32/erl_win32_sys_ddll.c
+++ b/erts/emulator/sys/win32/erl_win32_sys_ddll.c
@@ -25,6 +25,9 @@
 #include <windows.h>
 
 #define GET_ERTS_ALC_TEST
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include "global.h"
 #include "erl_alloc.h"
diff --git a/erts/emulator/sys/win32/erl_win_sys.h b/erts/emulator/sys/win32/erl_win_sys.h
index 92d8577537..ef4c65f0a7 100644
--- a/erts/emulator/sys/win32/erl_win_sys.h
+++ b/erts/emulator/sys/win32/erl_win_sys.h
@@ -191,13 +191,6 @@ int _finite(double x);
 #define erts_sys_block_fpe() 0
 #define erts_sys_unblock_fpe(x) do{}while(0)
 
-#define SIZEOF_SHORT   2
-#define SIZEOF_INT     4
-#define SIZEOF_LONG    4
-#define SIZEOF_VOID_P  4
-#define SIZEOF_SIZE_T  4
-#define SIZEOF_OFF_T   4
-
 /*
  * Seems to be missing.
  */
diff --git a/erts/emulator/sys/win32/sys_float.c b/erts/emulator/sys/win32/sys_float.c
index 9e67ca7f48..6c03821f3b 100644
--- a/erts/emulator/sys/win32/sys_float.c
+++ b/erts/emulator/sys/win32/sys_float.c
@@ -18,6 +18,9 @@
  */
 /* Float conversions */
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include "signal.h"
 
diff --git a/erts/emulator/sys/win32/sys_interrupt.c b/erts/emulator/sys/win32/sys_interrupt.c
index 93aaa23f97..347c31053b 100644
--- a/erts/emulator/sys/win32/sys_interrupt.c
+++ b/erts/emulator/sys/win32/sys_interrupt.c
@@ -19,6 +19,9 @@
 /*
  * Purpose: Interrupt handling in windows.
  */
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include "erl_alloc.h"
 #include "erl_thr_progress.h"
diff --git a/erts/emulator/sys/win32/sys_time.c b/erts/emulator/sys/win32/sys_time.c
index 50e43065b5..fc868507cb 100644
--- a/erts/emulator/sys/win32/sys_time.c
+++ b/erts/emulator/sys/win32/sys_time.c
@@ -20,6 +20,9 @@
  * Purpose: System-dependent time functions.
  */
 
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include "assert.h"
 
diff --git a/erts/emulator/utils/make_preload b/erts/emulator/utils/make_preload
index d22f08f993..62aaef51d9 100755
--- a/erts/emulator/utils/make_preload
+++ b/erts/emulator/utils/make_preload
@@ -39,6 +39,7 @@ use File::Basename;
 my $gen_rc = 0;
 my $gen_old = 0;
 my $windres = 0;
+my $msys = 0;
 my $file;
 
 my $progname = basename($0);
@@ -49,6 +50,8 @@ while (@ARGV && $ARGV[0] =~ /^-(\w+)/) {
 	$gen_rc = 1;
     } elsif ($opt eq '-windres') {
 	$windres = 1;
+    } elsif ($opt eq '-msys') {
+	$msys = 1;
     } elsif ($opt eq '-old') {
 	$gen_old = 1;
     } else {
@@ -68,7 +71,12 @@ foreach $file (@ARGV) {
 	unless $file =~ /\.beam$/;
     my $module = basename($file, ".beam");
     if ($gen_rc) {
-	my ($win_file) = split("\n", `(cygpath -d $file 2>/dev/null || cygpath -w $file)`);
+	my $win_file;
+	if ($msys) {
+	    ($win_file) = split("\n", `(msys2win_path.sh $file)`);
+	} else {
+	    ($win_file) = split("\n", `(cygpath -d $file 2>/dev/null || cygpath -w $file)`);
+	}
 	$win_file =~ s&\\&\\\\&g;
 	print "$num ERLANG_CODE \"$win_file\"\n";
 	push(@modules, "   ", -s $file, "L, $num, ",
diff --git a/erts/etc/common/Makefile.in b/erts/etc/common/Makefile.in
index 4754328c0b..689ff05582 100644
--- a/erts/etc/common/Makefile.in
+++ b/erts/etc/common/Makefile.in
@@ -22,7 +22,7 @@ include $(ERL_TOP)/make/target.mk
 ERTS_LIB_TYPEMARKER=.$(TYPE)
 
 USING_MINGW=@MIXED_CYGWIN_MINGW@
-USING_VC=@MIXED_CYGWIN_VC@
+USING_VC=@MIXED_VC@
 
 ifeq ($(TYPE),debug)
 PURIFY =
diff --git a/erts/etc/win32/msys_tools/erl b/erts/etc/win32/msys_tools/erl
new file mode 100644
index 0000000000..576825c4be
--- /dev/null
+++ b/erts/etc/win32/msys_tools/erl
@@ -0,0 +1,48 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Note! This shellscript expects to be run in a cygwin environment,
+# it converts erlc command lines to native windows erlc commands, which
+# basically means running the command cygpath on whatever is a path...
+
+CMD=""
+for x in "$@"; do 
+    case "$x" in
+	-I/*|-o/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    z=`echo $x | sed 's,^-\([Io]\)\(/.*\),\1,g'`;
+	    #echo "Foooo:$z"
+	    MPATH=`cygpath -m $y`;
+	    CMD="$CMD -$z\"$MPATH\"";; 
+	/*)
+	    #echo "absolute:"$x;
+	    MPATH=`cygpath -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+#	+{*);;
+	*)
+#	    y=`echo $x | sed 's,",\\\\\\\\\\\",g'`;
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+done
+#echo "$@"
+#eval echo erlc.exe $CMD
+ERL_TOP=`cygpath -m $ERL_TOP`
+export ERL_TOP
+eval erl.exe $CMD
diff --git a/erts/etc/win32/msys_tools/erlc b/erts/etc/win32/msys_tools/erlc
new file mode 100644
index 0000000000..a18ec27bf4
--- /dev/null
+++ b/erts/etc/win32/msys_tools/erlc
@@ -0,0 +1,61 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Note! This shellscript expects to be run in a cygwin environment,
+# it converts erlc command lines to native windows erlc commands, which
+# basically means running the command cygpath on whatever is a path...
+
+CMD=""
+ECHO_ONLY=false
+for x in "$@"; do 
+    case "$x" in
+	--echo_only)
+	    ECHO_ONLY=true;;
+	-I/*|-o/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    z=`echo $x | sed 's,^-\([Io]\)\(/.*\),\1,g'`;
+	    MPATH=`cygpath -m $y`;
+	    CMD="$CMD -$z$MPATH";;
+	-pa/*)
+	    y=`echo $x | sed 's,^-pa\(/.*\),\1,g'`;
+	    MPATH=`cygpath -m $y`;
+	    CMD="$CMD -pa $MPATH";;
+	/*)
+	    MPATH=`cygpath -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+# Needed for  +'{preproc_flags,whatever}'
+	+{preproc_flags,*})
+	     y=`echo $x | sed 's,^+{preproc_flags\,"\(.*\)"},\1,g'`;
+	     z=`eval $0 --echo_only $y`;
+	     case "$z" in # Dont "doubledoublequote"
+		 \"*\") 
+		 CMD="$CMD +'{preproc_flags,$z}'";;
+		 *)
+		 CMD="$CMD +'{preproc_flags,\"$z\"}'";;
+	     esac;;
+	*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+done
+if [ $ECHO_ONLY = true ]; then
+    echo $CMD
+else
+    eval erlc.exe $CMD
+fi
diff --git a/erts/etc/win32/msys_tools/javac.sh b/erts/etc/win32/msys_tools/javac.sh
new file mode 100644
index 0000000000..f9ee24593f
--- /dev/null
+++ b/erts/etc/win32/msys_tools/javac.sh
@@ -0,0 +1,53 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Note! This shellscript expects to be run in a cygwin environment,
+# it converts erlc command lines to native windows erlc commands, which
+# basically means running the command cygpath on whatever is a path...
+
+CMD=""
+CLASSPATH=`cygpath -m -p $CLASSPATH`
+export CLASSPATH
+#echo "CLASSPATH=$CLASSPATH"
+SAVE="$@"
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-I/*|-o/*|-d/*)
+	    y=`echo $x | sed 's,^-[Iod]\(/.*\),\1,g'`;
+	    z=`echo $x | sed 's,^-\([Iod]\)\(/.*\),\1,g'`;
+	    #echo "Foooo:$z"
+	    MPATH=`cygpath -m $y`;
+	    CMD="$CMD -$z\"$MPATH\"";; 
+	-d|-I|-o)
+	    shift;
+	    MPATH=`cygpath -m $1`;
+	    CMD="$CMD $x $MPATH";; 
+	/*)
+	    #echo "absolute:"$x;
+	    MPATH=`cygpath -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+	*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+    shift
+done
+#echo javac.exe $CMD
+eval javac.exe $CMD
diff --git a/erts/etc/win32/msys_tools/make_bootstrap_ini.sh b/erts/etc/win32/msys_tools/make_bootstrap_ini.sh
new file mode 100644
index 0000000000..954bd5de30
--- /dev/null
+++ b/erts/etc/win32/msys_tools/make_bootstrap_ini.sh
@@ -0,0 +1,44 @@
+#! /bin/bash
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2003-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Create a local init-file for erlang in the build environment.
+if [ -z "$1" ]; then
+	echo "error: $0: No rootdir given"
+ 	exit 1
+else
+    RDIR=$1
+fi
+if [ -z "$2" ]; then
+	echo "error: $0: No bindir given"
+ 	exit 1
+else
+    BDIR=$2
+fi
+
+DRDIR=`msys2win_path.sh $RDIR | sed 's,\\\,\\\\\\\\,g'`
+DBDIR=`msys2win_path.sh $BDIR | sed 's,\\\,\\\\\\\\,g'`
+
+
+cat > $RDIR/bin/erl.ini <<EOF
+[erlang]
+Bindir=$DBDIR
+Progname=erl
+Rootdir=$DRDIR
+EOF
+
diff --git a/erts/etc/win32/msys_tools/make_local_ini.sh b/erts/etc/win32/msys_tools/make_local_ini.sh
new file mode 100644
index 0000000000..8e29573dc4
--- /dev/null
+++ b/erts/etc/win32/msys_tools/make_local_ini.sh
@@ -0,0 +1,41 @@
+#! /bin/bash
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2003-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Create a local init-file for erlang in the build environment.
+if [ -z "$1" ]; then
+    if [ -z $ERL_TOP ]; then
+	echo "error: $0: No rootdir available"
+ 	exit 1
+    else
+	RDIR=$ERL_TOP
+    fi
+else
+    RDIR=$1
+fi
+
+DDIR=`(cygpath -d $RDIR 2>/dev/null || cygpath -w $RDIR) | sed 's,\\\,\\\\\\\\,g'`
+
+
+cat > $RDIR/bin/erl.ini <<EOF
+[erlang]
+Bindir=$DDIR\\\\bin\\\\win32
+Progname=erl
+Rootdir=$DDIR
+EOF
+
diff --git a/erts/etc/win32/msys_tools/msys2win_path.sh b/erts/etc/win32/msys_tools/msys2win_path.sh
new file mode 100644
index 0000000000..679a9d6a8f
--- /dev/null
+++ b/erts/etc/win32/msys_tools/msys2win_path.sh
@@ -0,0 +1,44 @@
+#! /bin/bash

+MIXED=false

+ABSOLUTE=false

+done=false

+while [ $done = false ]; do

+    case "$1" in

+	-m) 

+	    MIXED=true;

+	    shift;;

+	-a)

+	    ABSOLUTE=true;

+	    shift;;

+	*)

+	    done=true;;

+    esac

+done

+if [ -z "$1" ]; then

+    echo "Usage: $0 <path>" >&2

+    exit 1;

+fi

+MSYS_PATH=`win2msys_path.sh "$1"` # Clean up spaces

+if [ $ABSOLUTE = true ]; then

+    MSYS_DIR=`dirname "$MSYS_PATH"`

+    MSYS_FILE=`basename "$MSYS_PATH"`

+    if [ X"$MSYS_FILE" = X".." ]; then

+	MSYS_DIR="$MSYS_DIR/$MSYS_FILE"

+	WIN_ADD=""

+    else

+	WIN_ADD="/$MSYS_FILE"

+    fi

+    SAVEDIR=`pwd`

+    cd $MSYS_DIR

+    CURRENT=`pwd`

+    cd $SAVEDIR

+    WINPATH=`cmd //C echo $CURRENT`

+    WINPATH="$WINPATH$WIN_ADD"

+else

+    WINPATH=`cmd //c echo $MSYS_PATH`

+fi

+if [ $MIXED = true ]; then

+    echo $WINPATH

+else

+    echo $WINPATH | sed 's,/,\\,g'

+fi
\ No newline at end of file
diff --git a/erts/etc/win32/msys_tools/reg_query.sh b/erts/etc/win32/msys_tools/reg_query.sh
new file mode 100644
index 0000000000..ae6d5c3218
--- /dev/null
+++ b/erts/etc/win32/msys_tools/reg_query.sh
@@ -0,0 +1,24 @@
+#! /bin/sh

+BAT_FILE=/tmp/w$$.bat

+if [ -z "$1" -o -z "$2" ]; then

+    echo "Usage:" "$0" '<key> <valuename>'

+    exit 1

+fi

+BACKED=`echo "$1" | sed 's,/,\\\\,g'`

+# We need to get the 64bit part of the registry, hence we need to execute 

+# a 64bit reg.exe, but c:\windows\system32 is redirected to 32bit versions

+# if we ate in the 32bit virtual environment, why we need to use the 

+# sysnative trick to get to the 64bit executable of reg.exe (ouch!)

+if [ -d $WINDIR/sysnative ]; then

+    REG_CMD="$WINDIR\\sysnative\\reg.exe"

+else

+    REG_CMD="reg"

+fi

+cat > $BAT_FILE <<EOF

+@echo off

+$REG_CMD query "$BACKED" /v "$2"

+EOF

+#echo $BAT_FILE

+#cat $BAT_FILE

+RESULT=`cmd //C $BAT_FILE`

+echo $RESULT | sed "s,.*$2 REG_[^ ]* ,,"

diff --git a/erts/etc/win32/msys_tools/vc/ar.sh b/erts/etc/win32/msys_tools/vc/ar.sh
new file mode 100644
index 0000000000..68f3dad5c6
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/ar.sh
@@ -0,0 +1,47 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+CMD=""
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-out:)
+	    shift
+	    case "$1" in
+		/*)
+		    MPATH=`msys2win_path.sh -m $1`;;
+		 *)
+		    MPATH=$1;;
+	    esac
+	    CMD="$CMD -out:\"$MPATH\"";; 
+	-out:/*)
+	    y=`echo $x | sed 's,^-out:\(/.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -out:\"$MPATH\"";; 
+	/*)
+	    MPATH=`msys2win_path.sh -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+	*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+    shift
+done
+
+eval lib.exe $CMD
diff --git a/erts/etc/win32/msys_tools/vc/cc.sh b/erts/etc/win32/msys_tools/vc/cc.sh
new file mode 100644
index 0000000000..d67c746eb8
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/cc.sh
@@ -0,0 +1,316 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Icky cl wrapper that does it's best to behave like a Unixish cc.
+# Made to work for Erlang builds and to make configure happy, not really 
+# general I suspect.
+# set -x
+# Save the command line for debug outputs
+
+SAVE="$@"
+
+# Constants
+COMMON_CFLAGS="-nologo -D__WIN32__ -DWIN32 -DWINDOWS -D_WIN32 -DNT -D_CRT_SECURE_NO_DEPRECATE"
+
+# Variables
+# The stdout and stderr for the compiler
+MSG_FILE=/tmp/cl.exe.$$.1
+ERR_FILE=/tmp/cl.exe.$$.2
+
+# "Booleans" determined during "command line parsing"
+# If the stdlib option is explicitly passed to this program
+MD_FORCED=false
+# If we're preprocession (only) i.e. -E
+PREPROCESSING=false
+# If we're generating dependencies (implies preprocesing)
+DEPENDENCIES=false
+# If this is supposed to be a debug build
+DEBUG_BUILD=false
+# If this is supposed to be an optimized build (there can only be one...)
+OPTIMIZED_BUILD=false
+# If we're linking or only compiling
+LINKING=true
+
+# This data is accumulated during command line "parsing"
+# The stdlibrary option, default multithreaded dynamic
+MD=-MD
+# Flags for debug compilation
+DEBUG_FLAGS=""
+# Flags for optimization
+OPTIMIZE_FLAGS=""
+# The specified output filename (if any), may be either object or exe.
+OUTFILE=""
+# Unspecified command line options for the compiler
+CMD=""
+# All the c source files, in unix style
+SOURCES=""
+# All the options to pass to the linker, kept in Unix style
+LINKCMD=""
+
+
+# Loop through the parameters and set the above variables accordingly
+# Also convert some cygwin filenames to "mixed style" dito (understood by the
+# compiler very well), except for anything passed to the linker, that script
+# handles those and the sources, which are also kept unixish for now
+
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-Wall)
+	    ;;
+	-c) 
+	    LINKING=false;;
+	    #CMD="$CMD -c";;
+	-MM)
+	    PREPROCESSING=true;
+	    LINKING=false;
+	    DEPENDENCIES=true;;
+	-E)
+	    PREPROCESSING=true;
+	    LINKING=false;; # Obviously...
+	    #CMD="$CMD -E";;
+	-Owx)
+	    # Optimization hardcoded of wxErlang, needs to disable debugging too
+	    OPTIMIZE_FLAGS="-Ob2ity -Gs -Zi";
+	    DEBUG_FLAGS="";
+	    DEBUG_BUILD=false;
+	    if [ $MD_FORCED = false ]; then
+		MD=-MD;
+	    fi
+	    OPTIMIZED_BUILD=true;;
+	-O*)
+	    # Optimization hardcoded, needs to disable debugging too
+	    OPTIMIZE_FLAGS="-Ox -Zi";
+	    DEBUG_FLAGS="";
+	    DEBUG_BUILD=false;
+	    if [ $MD_FORCED = false ]; then
+		MD=-MD;
+	    fi
+	    OPTIMIZED_BUILD=true;;
+	-g|-ggdb)
+	    if [ $OPTIMIZED_BUILD = false ];then
+		# Hardcoded windows debug flags
+		DEBUG_FLAGS="-Z7";
+		if [ $MD_FORCED = false ]; then
+		    MD=-MDd;
+		fi
+		LINKCMD="$LINKCMD -g";
+		DEBUG_BUILD=true;
+	    fi;;
+	# Allow forcing of stdlib
+	-mt|-MT)
+	    MD="-MT";
+	    MD_FORCED=true;;
+	-md|-MD)
+	    MD="-MD";
+	    MD_FORCED=true;;
+	-ml|-ML)
+	    MD="-ML";
+	    MD_FORCED=true;;
+	-mdd|-MDD|-MDd)
+	    MD="-MDd";
+	    MD_FORCED=true;;
+	-mtd|-MTD|-MTd)
+	    MD="-MTd";
+	    MD_FORCED=true;;
+	-mld|-MLD|-MLd)
+	    MD="-MLd";
+	    MD_FORCED=true;;
+	-o)
+	    shift;
+	    OUTFILE="$1";;
+	-o*)
+	    y=`echo $x | sed 's,^-[Io]\(.*\),\1,g'`;
+	    OUTFILE="$y";;
+	-I/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    z=`echo $x | sed 's,^-\([Io]\)\(/.*\),\1,g'`;
+	    MPATH=`echo $y`;
+	    CMD="$CMD -$z\"$MPATH\"";; 
+	-I*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD $y";;
+	-D*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD $y";;
+	-EH*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD $y";;
+	-l*)
+	    y=`echo $x | sed 's,^-l\(.*\),\1,g'`;
+	    LINKCMD="$LINKCMD $x";;
+	/*.c)
+	    SOURCES="$SOURCES $x";;
+	*.c)
+	    SOURCES="$SOURCES $x";;
+	/*.cc)
+	    SOURCES="$SOURCES $x";;
+	*.cc)
+	    SOURCES="$SOURCES $x";;
+	/*.cpp)
+	    SOURCES="$SOURCES $x";;
+	*.cpp)
+	    SOURCES="$SOURCES $x";;
+	/*.o)
+	    LINKCMD="$LINKCMD $x";;
+	*.o)
+	    LINKCMD="$LINKCMD $x";;
+	*)
+	    # Try to quote uninterpreted options
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    LINKCMD="$LINKCMD $y";;
+    esac
+    shift
+done
+
+#Return code from compiler, linker.sh and finally this script...
+RES=0
+
+# Accumulated object names
+ACCUM_OBJECTS=""
+
+# A temporary object file location
+TMPOBJDIR=/tmp/tmpobj$$
+mkdir $TMPOBJDIR
+
+# Compile
+for x in $SOURCES; do
+    start_time=`date '+%s'` 
+    # Compile each source
+    if [ $LINKING = false ]; then
+	# We should have an output defined, which is a directory 
+	# or an object file
+	case $OUTFILE in
+	    /*.o)
+		# Simple output, SOURCES should be one single
+		n=`echo $SOURCES | wc -w`;
+		if [ $n -gt 1 ]; then
+		    echo "cc.sh:Error, multiple sources, one object output.";
+		    exit 1;
+		else
+		    output_filename=`echo $OUTFILE`;
+		fi;;
+	    *.o)
+		# Relative path needs no translation
+		n=`echo $SOURCES | wc -w`
+		if [ $n -gt 1 ]; then
+		    echo "cc.sh:Error, multiple sources, one object output."
+		    exit 1
+		else
+		    output_filename=$OUTFILE
+		fi;;
+	    /*)
+		# Absolute directory
+		o=`echo $x | sed 's,.*/,,' | sed 's,\.c$,.o,'`
+		output_filename=`echo $OUTFILE`
+		output_filename="$output_filename/${o}";;
+	    *)
+		# Relative_directory or empty string (.//x.o is valid)
+		o=`echo $x | sed 's,.*/,,' | sed 's,\.cp*$,.o,'`
+		output_filename="./${OUTFILE}/${o}";;
+	esac
+    else
+	# We are linking, which means we build objects in a temporary 
+	# directory and link from there. We should retain the basename
+	# of each source to make examining the exe easier...
+	o=`echo $x | sed 's,.*/,,' | sed 's,\.c$,.o,'`
+	output_filename=$TMPOBJDIR/$o
+	ACCUM_OBJECTS="$ACCUM_OBJECTS $output_filename"
+    fi
+    # Now we know enough, lets try a compilation...
+    MPATH=`echo $x`
+    if [ $PREPROCESSING = true ]; then
+	output_flag="-E"
+    else
+	output_flag="-c -Fo`cmd //C echo ${output_filename}`"
+    fi
+    params="$COMMON_CFLAGS $MD $DEBUG_FLAGS $OPTIMIZE_FLAGS \
+	    $CMD ${output_flag} $MPATH"
+    if [ "X$CC_SH_DEBUG_LOG" != "X" ]; then
+	echo cc.sh "$SAVE" >>$CC_SH_DEBUG_LOG
+	echo cl.exe $params >>$CC_SH_DEBUG_LOG
+    fi
+    eval cl.exe $params >$MSG_FILE 2>$ERR_FILE
+    RES=$?
+    if test $PREPROCESSING = false; then
+	cat $ERR_FILE >&2
+	tail -n +2 $MSG_FILE
+    else
+	tail -n +2 $ERR_FILE >&2
+	if test $DEPENDENCIES = true; then
+	    if test `grep -v $x $MSG_FILE | grep -c '#line'` != "0"; then
+		o=`echo $x | sed 's,.*/,,' | sed 's,\.cp*$,.o,'`
+		echo -n $o':'
+		cat $MSG_FILE | grep '#line' | grep -v $x | awk -F\" '{printf("%s\n",$2)}' | sort -u | grep -v " " | xargs -n 1 win2msys_path.sh | awk '{printf("\\\n %s ",$0)}' 
+		echo
+		echo 
+		after_sed=`date '+%s'`
+		echo Made dependencises for $x':' `expr $after_sed '-' $start_time` 's' >&2
+	    fi 
+	else
+	    cat $MSG_FILE
+	fi
+    fi
+    rm -f $ERR_FILE $MSG_FILE
+    if [ $RES != 0 ]; then
+	rm -rf $TMPOBJDIR
+	exit $RES
+    fi
+done
+
+# If we got here, we succeeded in compiling (if there were anything to compile)
+# The output filename should name an executable if we're linking
+if [ $LINKING = true ]; then
+    case $OUTFILE in
+	"")
+	    # Use the first source name to name the executable
+	    first_source=""
+	    for x in $SOURCES; do first_source=$x; break; done;
+	    if [ -n "$first_source" ]; then
+		e=`echo $x | sed 's,.*/,,' | sed 's,\.c$,.exe,'`;
+		out_spec="-o $e";
+	    else
+		out_spec="";
+	    fi;;
+	*)
+	    out_spec="-o $OUTFILE";;
+    esac
+    # Descide which standard library to link against
+    case $MD in
+	-ML)
+	    stdlib="-lLIBC";;
+	-MLd)
+	    stdlib="-lLIBCD";;
+	-MD)
+	    stdlib="-lMSVCRT";;
+	-MDd)
+	    stdlib="-lMSVCRTD";;
+	-MT)
+	    stdlib="-lLIBCMT";;
+	-MTd)
+	    stdlib="-lLIBMTD";;
+    esac
+    # And finally call the next script to do the linking...
+    params="$out_spec $LINKCMD $stdlib" 
+    eval ld.sh $ACCUM_OBJECTS $params
+    RES=$?
+fi
+rm -rf $TMPOBJDIR
+
+exit $RES
diff --git a/erts/etc/win32/msys_tools/vc/coffix.c b/erts/etc/win32/msys_tools/vc/coffix.c
new file mode 100644
index 0000000000..dee0132a61
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/coffix.c
@@ -0,0 +1,161 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1999-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+/*
+** This mini tool fixes an incompatibility between 
+** Microsoft's tools, who dont like the virtual size being put in
+** the physical address field, but rely on the raw size field for
+** sizing the ".bss" section.
+** This fixes some of the problems with linking gcc compiled objects
+** together with MSVC dito.
+**
+** Courtesy DJ Delorie for describing the COFF file format on 
+** http://www.delorie.com/djgpp/doc/coff/
+** The coff structures are fetched from Microsofts headers though.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <windows.h>
+#include <winnt.h> /* Structure definitions for PE (COFF) */
+
+static int dump_edit(char *filename, int edit);
+static int v_printf(char *format, ...);
+
+
+char *progname;
+int verbouse = 0;
+
+int main(int argc, char **argv) 
+{
+    int findex = 1;
+    int edit = 0;
+    int ret;
+
+    progname = argv[0];
+    if (argc == 1) {
+	fprintf(stderr,"Format : %s [-e] [-v] <filename>\n", progname);
+	return 1;
+    }
+    for (findex = 1; 
+	 findex < argc && (*argv[findex] == '-' || *argv[findex] == '/');
+	 ++findex)
+	switch (argv[findex][1]) {
+	case 'e':
+	case 'E':
+	    edit = 1;
+	    break;
+	case 'v':
+	case 'V':
+	    verbouse = 1;
+	default:
+	    fprintf(stderr, "%s: unknown option %s\n", progname, argv[findex]);
+	    break;
+	}
+    if (findex == argc) {
+	fprintf(stderr,"%s: No filenames given.\n", progname);
+	return 1;
+    }
+    for(; findex < argc; ++findex)
+	if ((ret = dump_edit(argv[findex],edit)) != 0)
+	    return ret;
+    return 0;
+}
+
+int dump_edit(char *filename, int edit) 
+{
+    FILE *f = fopen(filename, (edit) ? "r+b" : "rb");
+    IMAGE_FILE_HEADER filhdr;
+    IMAGE_SECTION_HEADER scnhdr;
+    int i;
+
+    if (f == NULL) {
+	fprintf(stderr, "%s: cannot open %s.\n", progname, filename);
+	return 1;
+    }
+    
+    if (fread(&filhdr, sizeof(filhdr), 1, f) == 0) {
+	fprintf(stderr,"%s: Could not read COFF header from %s,"
+		" is this a PE (COFF) file?\n", progname, filename);
+	fclose(f);
+	return 1;
+    }
+    v_printf("File: %s\n", filename);
+    v_printf("Magic number: 0x%08x\n", filhdr.Machine);
+    v_printf("Number of sections: %d\n",filhdr.NumberOfSections);
+    
+    if (fseek(f, (long) filhdr.SizeOfOptionalHeader, SEEK_CUR) != 0) {
+	fprintf(stderr,"%s: Could not read COFF optional header from %s,"
+		" is this a PE (COFF) file?\n", progname, filename);
+	fclose(f);
+	return 1;
+    }
+    
+    for (i = 0; i < filhdr.NumberOfSections; ++i) {
+	if (fread(&scnhdr, sizeof(scnhdr), 1, f) == 0) {
+	    fprintf(stderr,"%s: Could not read section header from %s,"
+		    " is this a PE (COFF) file?\n", progname, filename);
+	    fclose(f);
+	    return 1;
+	}
+	v_printf("Section %s:\n", scnhdr.Name);
+	v_printf("Physical address: 0x%08x\n", scnhdr.Misc.PhysicalAddress);
+	v_printf("Size: 0x%08x\n", scnhdr.SizeOfRawData);
+	if (scnhdr.Misc.PhysicalAddress != 0 &&
+	    scnhdr.SizeOfRawData == 0) {
+	    printf("Section header %s in file %s will confuse MSC linker, "
+		   "virtual size is 0x%08x and raw size is 0\n",
+		   scnhdr.Name, filename, scnhdr.Misc.PhysicalAddress, 
+		   scnhdr.SizeOfRawData);
+	    if (edit) {
+		scnhdr.SizeOfRawData = scnhdr.Misc.PhysicalAddress;
+		scnhdr.Misc.PhysicalAddress = 0;
+		if (fseek(f, (long) -((long)sizeof(scnhdr)), SEEK_CUR) != 0 ||
+		    fwrite(&scnhdr, sizeof(scnhdr), 1, f) == 0) {
+		    fprintf(stderr,"%s: could not edit file %s.\n",
+			    progname, filename);
+		    fclose(f);
+		    return 1;
+		}
+		printf("Edited object, virtual size is now 0, and "
+		       "raw size is 0x%08x.\n", scnhdr.SizeOfRawData);
+	    } else {
+		printf("Specify option '-e' to correct the problem.\n");
+	    }
+	}
+    }
+    fclose(f);
+    return 0;
+}
+	    
+
+static int v_printf(char *format, ...)
+{
+    va_list ap;
+    int ret = 0;
+    if (verbouse) {
+	va_start(ap, format);
+	ret = vfprintf(stdout, format, ap);
+	va_end(ap);
+    }
+    return ret;
+}
+
diff --git a/erts/etc/win32/msys_tools/vc/emu_cc.sh b/erts/etc/win32/msys_tools/vc/emu_cc.sh
new file mode 100644
index 0000000000..71ed95d8c8
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/emu_cc.sh
@@ -0,0 +1,95 @@
+#! /bin/sh
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+if [ X"$CONFIG_SUBTYPE" = X"win64" ]; then
+    GCC="x86_64-w64-mingw32-gcc.exe"
+else 
+    GCC="gcc"
+fi
+TOOLDIR=$ERL_TOP/erts/etc/win32/msys_tools/vc
+COFFIX=$TOOLDIR/coffix
+WTOOLDIR0=`win2msys_path.sh "$TOOLDIR"`
+WTOOLDIR=`cmd //C echo $WTOOLDIR0`
+# Do primitive 'make'
+newer_exe=`find $TOOLDIR -newer $COFFIX.c -name coffix.exe -print`
+if [ -z $newer_exe ]; then
+    echo recompiling $COFFIX.exe
+    cl.exe -Fe${WTOOLDIR}/coffix.exe ${WTOOLDIR}/coffix.c
+    rm -f $COFFIX.obj coffix.obj $COFFIX.pdb coffix.pdb
+fi
+
+# Try to find out the output filename and remove it from command line
+CMD=""
+OUTFILE=""
+INFILE=""
+SKIP_COFFIX=false
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-o/*)
+	    OUTFILE=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;;
+	-o)
+	    shift
+	    OUTFILE=$1;;
+	-MM)
+	    SKIP_COFFIX=true
+	    CMD="$CMD \"$x\"";;
+	*.c)
+	    INFILE="$INFILE $x";
+	    CMD="$CMD \"$x\"";;
+	*)
+	    CMD="$CMD \"$x\"";;
+    esac
+    shift
+done
+if [ -z "$INFILE" ]; then
+    echo 'emu_cc.sh: please give an input filename for the compiler' >&2
+    exit 1
+fi    
+if [ -z "$OUTFILE" ]; then
+    OUTFILE=`echo $INFILE | sed 's,\.c$,.o,'`
+fi
+
+if [ $SKIP_COFFIX = false ]; then
+    n=`echo $INFILE | wc -w`;
+    if [ $n -gt 1 ]; then
+	echo "emu_cc.sh:Error, multiple sources, one object output.";
+	exit 1;
+    fi
+    TEMPFILE=/tmp/tmp_emu_cc$$.o
+    if [ "X$EMU_CC_SH_DEBUG_LOG" != "X" ]; then
+	echo "$GCC -o $TEMPFILE -D__WIN32__ -DWIN32 -DWINDOWS -fomit-frame-pointer $CMD" >> $EMU_CC_SH_DEBUG_LOG 2>&1
+    fi
+    eval $GCC -o $TEMPFILE -D__WIN32__ -DWIN32 -DWINDOWS -fomit-frame-pointer $CMD
+    RES=$?
+    if [ $RES = 0 ]; then
+	$COFFIX.exe -e `win2msys_path.sh $TEMPFILE`
+	RES=$?
+	if [ $RES = 0 ]; then
+	    cp $TEMPFILE $OUTFILE
+	else
+	    echo "emu_cc.sh: fatal: coffix failed!" >&2
+	fi
+    fi
+    rm -f $TEMPFILE
+    exit $RES
+else
+    eval $GCC -D__WIN32__ -DWIN32 -DWINDOWS -fomit-frame-pointer -fno-tree-copyrename $CMD 2>/dev/null
+    exit $?
+fi
diff --git a/erts/etc/win32/msys_tools/vc/ld.sh b/erts/etc/win32/msys_tools/vc/ld.sh
new file mode 100644
index 0000000000..aa44a65912
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/ld.sh
@@ -0,0 +1,198 @@
+#! /bin/sh
+# set -x
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Save the command line for debug outputs
+
+SAVE="$@"
+kernel_libs="kernel32.lib advapi32.lib"
+gdi_libs="gdi32.lib user32.lib comctl32.lib comdlg32.lib shell32.lib"
+DEFAULT_LIBRARIES="$kernel_libs $gdi_libs"
+
+CMD=""
+STDLIB=MSVCRT.LIB
+DEBUG_BUILD=false
+STDLIB_FORCED=false
+BUILD_DLL=false
+OUTPUT_FILENAME=""
+
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-dll| -DLL)
+	    BUILD_DLL=true;; 
+	-L/*|-L.*)
+	    y=`echo $x | sed 's,^-L\(.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -libpath:\"$MPATH\"";; 
+	-lMSVCRT|-lmsvcrt)
+	    STDLIB_FORCED=true;
+	    STDLIB=MSVCRT.LIB;; 
+	-lMSVCRTD|-lmsvcrtd)
+	    STDLIB_FORCED=true;
+	    STDLIB=MSVCRTD.LIB;; 
+	-lLIBCMT|-llibcmt)
+	    STDLIB_FORCED=true;
+	    STDLIB=LIBCMT.LIB;; 
+	-lLIBCMTD|-llibcmtd)
+	    STDLIB_FORCED=true;
+	    STDLIB=LIBCMTD.LIB;; 
+	-lsocket)
+	    DEFAULT_LIBRARIES="$DEFAULT_LIBRARIES WS2_32.LIB IPHLPAPI.LIB";;
+	-l*)
+	    y=`echo $x | sed 's,^-l\(.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD \"${MPATH}.lib\"";; 
+	-g)
+	    DEBUG_BUILD=true;;
+	-pdb:none|-incremental:no)
+	    ;;
+	-implib:*)
+	    y=`echo $x | sed 's,^-implib:\(.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -implib:\"${MPATH}\"";; 
+	-def:*)
+	    y=`echo $x | sed 's,^-def:\(.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -def:\"${MPATH}\"";; 
+	-o)
+	    shift
+	    MPATH=`msys2win_path.sh -m $1`;
+	    OUTPUT_FILENAME="$MPATH";;
+	-o/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    OUTPUT_FILENAME="$MPATH";;
+	/*)
+	    MPATH=`msys2win_path.sh -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+	*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+    shift
+done
+if [ $DEBUG_BUILD = true ]; then
+    linktype="-debug -pdb:none"
+    if [ $STDLIB_FORCED = false ]; then
+	STDLIB=MSVCRTD.LIB
+    fi
+fi
+# Generate a PDB 
+linkadd_pdb=""
+case "$OUTPUT_FILENAME" in
+    *.exe|*.EXE)
+	    fn=`echo "$OUTPUT_FILENAME" | sed 's,[eE][xX][eE]$,,g'`;
+	    linkadd_pdb="-pdb:\"${fn}pdb\"";;
+    *.dll|*.DLL)
+	    fn=`echo "$OUTPUT_FILENAME" | sed 's,[dD][lL][lL]$,,g'`;
+	    linkadd_pdb="-pdb:\"${fn}pdb\"";;
+    "")
+	    linkadd_pdb="-pdb:\"a.pdb\"";;
+    *)
+	    linkadd_pdb="-pdb:\"${OUTPUT_FILENAME}.pdb\"";;
+esac
+	
+    linktype="-debug $linkadd_pdb"
+
+CHMOD_FILE=""
+
+if [ $BUILD_DLL = true ];then
+    case "$OUTPUT_FILENAME" in
+	*.exe|*.EXE)
+	    echo "Warning, output set to .exe when building DLL" >&2
+	    CHMOD_FILE="$OUTPUT_FILENAME";
+	    CMD="-dll -out:\"$OUTPUT_FILENAME\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}\;2";
+	    MANIFEST="${OUTPUT_FILENAME}.manifest";;
+	*.dll|*.DLL)
+	    CMD="-dll -out:\"$OUTPUT_FILENAME\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}\;2";
+	    MANIFEST="${OUTPUT_FILENAME}.manifest";;
+	"")
+	    CMD="-dll -out:\"a.dll\" $CMD";
+	    OUTPUTRES="a.dll\;2";
+	    MANIFEST="a.dll.manifest";;
+	*)
+	    CMD="-dll -out:\"${OUTPUT_FILENAME}.dll\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}.dll\;2";
+	    MANIFEST="${OUTPUT_FILENAME}.dll.manifest";;
+    esac
+else
+    case "$OUTPUT_FILENAME" in
+	*.exe|*.EXE)
+	    CHMOD_FILE="$OUTPUT_FILENAME";
+	    CMD="-out:\"$OUTPUT_FILENAME\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}\;1"
+	    MANIFEST="${OUTPUT_FILENAME}.manifest";;
+	*.dll|*.DLL)
+	    echo "Warning, output set to .dll when building EXE" >&2
+	    CMD="-out:\"$OUTPUT_FILENAME\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}\;1";
+	    MANIFEST="${OUTPUT_FILENAME}.manifest";;
+	"")
+	    CHMOD_FILE="a.exe";
+	    CMD="-out:\"a.exe\" $CMD";
+	    OUTPUTRES="a.exe\;1";
+	    MANIFEST="a.exe.manifest";;
+	*)
+	    CMD="-out:\"${OUTPUT_FILENAME}.exe\" $CMD";
+	    OUTPUTRES="${OUTPUT_FILENAME}.exe\;1";
+	    MANIFEST="${OUTPUT_FILENAME}.exe.manifest";;
+    esac
+fi    
+	    
+p=$$
+CMD="$linktype -nologo -incremental:no $CMD $STDLIB $DEFAULT_LIBRARIES"
+if [ "X$LD_SH_DEBUG_LOG" != "X" ]; then
+    echo ld.sh "$SAVE" >>$LD_SH_DEBUG_LOG
+    echo link.exe $CMD >>$LD_SH_DEBUG_LOG
+fi
+eval link.exe "$CMD"  >/tmp/link.exe.${p}.1 2>/tmp/link.exe.${p}.2
+RES=$?
+
+CMANIFEST=`win2msys_path.sh $MANIFEST`
+if [ "$RES" = "0" -a -f "$CMANIFEST" ]; then
+    # Add stuff to manifest to turn off "virtualization"
+    sed -n -i '1h;1!H;${;g;s,<trustInfo.*</trustInfo>.,,g;p;}' $CMANIFEST
+    sed -i "s/<\/assembly>/ <ms_asmv2:trustInfo xmlns:ms_asmv2=\"urn:schemas-microsoft-com:asm.v2\">\n  <ms_asmv2:security>\n   <ms_asmv2:requestedPrivileges>\n    <ms_asmv2:requestedExecutionLevel level=\"AsInvoker\" uiAccess=\"false\"\/>\n   <\/ms_asmv2:requestedPrivileges>\n  <\/ms_asmv2:security>\n <\/ms_asmv2:trustInfo>\n<\/assembly>/" $CMANIFEST
+
+    eval mt.exe -nologo -manifest "$MANIFEST" -outputresource:"$OUTPUTRES" >>/tmp/link.exe.${p}.1 2>>/tmp/link.exe.${p}.2
+    RES=$?
+    if [ "$RES" != "0" ]; then
+	REMOVE=`echo "$OUTPUTRES" | sed 's,\\\;[12]$,,g'`
+	CREMOVE=`cygpath $REMOVE`
+	rm -f "$CREMOVE"
+    fi
+    rm -f "$CMANIFEST"
+fi
+
+# This works around some strange behaviour 
+# in cygwin 1.7 Beta on Windows 7 with samba drive.
+# Configure will think the compiler failed if test -x fails, 
+# which it might do as we might not be the owner of the
+# file.
+if [ '!' -z "$CHMOD_FILE" -a -s "$CHMOD_FILE" -a '!' -x "$CHMOD_FILE" ]; then
+    chmod +x $CHMOD_FILE
+fi
+    
+tail -n +2 /tmp/link.exe.${p}.2 >&2
+cat /tmp/link.exe.${p}.1
+rm -f /tmp/link.exe.${p}.2 /tmp/link.exe.${p}.1
+exit $RES
diff --git a/erts/etc/win32/msys_tools/vc/mc.sh b/erts/etc/win32/msys_tools/vc/mc.sh
new file mode 100644
index 0000000000..2993935582
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/mc.sh
@@ -0,0 +1,87 @@
+#! /bin/sh
+# set -x
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Save the command line for debug outputs
+SAVE="$@"
+CMD=""
+OUTPUT_DIRNAME=""
+
+# Find the correct mc.exe. This could be done by the configure script,
+# But as we seldom use the message compiler, it might as well be done here...
+MCC=""
+save_ifs=$IFS
+IFS=:
+for p in $PATH; do 
+    if [ -f $p/mc.exe ]; then 
+	if [ -n "`$p/mc.exe -? 2>&1 >/dev/null </dev/null \
+                 | grep -i \"message compiler\"`" ]; then 
+	    MCC=`echo "$p/mc.exe" | sed 's/ /\\\\ /g'`
+	fi
+    fi
+done
+IFS=$save_ifs
+
+if [ -z "$MCC" ]; then
+    echo 'mc.exe not found!' >&2
+    exit 1
+fi
+
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-o)
+	    shift
+	    OUTPUT_DIRNAME="$1";;
+	-o/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    OUTPUT_DIRNAME="$y";;
+	-I)
+	    shift
+	    MPATH=`msys2win_path.sh -m $1`;
+	    CMD="$CMD -I\"$MPATH\"";;
+	-I/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -I\"$MPATH\"";;
+	*)
+	    MPATH=`msys2win_path.sh -m -a $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+    esac
+    shift
+done
+p=$$
+if [ "X$MC_SH_DEBUG_LOG" != "X" ]; then
+    echo mc.sh "$SAVE" >>$MC_SH_DEBUG_LOG
+    echo mc.exe $CMD >>$MC_SH_DEBUG_LOG
+fi
+if [ -n "$OUTPUT_DIRNAME" ]; then
+    cd $OUTPUT_DIRNAME
+    RES=$?
+    if [ "$RES" != "0" ]; then
+	echo "mc.sh: Error: could not cd to $OUTPUT_DIRNAME">&2
+	exit $RES
+    fi
+fi
+eval $MCC "$CMD"  >/tmp/mc.exe.${p}.1 2>/tmp/mc.exe.${p}.2
+RES=$?
+tail +2 /tmp/mc.exe.${p}.2 >&2
+cat /tmp/mc.exe.${p}.1
+rm -f /tmp/mc.exe.${p}.2 /tmp/mc.exe.${p}.1
+exit $RES
diff --git a/erts/etc/win32/msys_tools/vc/rc.sh b/erts/etc/win32/msys_tools/vc/rc.sh
new file mode 100644
index 0000000000..069bca73a3
--- /dev/null
+++ b/erts/etc/win32/msys_tools/vc/rc.sh
@@ -0,0 +1,86 @@
+#! /bin/sh
+# set -x
+# 
+# %CopyrightBegin%
+# 
+# Copyright Ericsson AB 2002-2009. All Rights Reserved.
+# 
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+# 
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+# 
+# %CopyrightEnd%
+# 
+# Save the command line for debug outputs
+SAVE="$@"
+CMD=""
+OUTPUT_FILENAME=""
+
+# Find the correct rc.exe. This could be done by the configure script,
+# But as we seldom use the resource compiler, it might as well be done here...
+RCC=""
+save_ifs=$IFS
+IFS=:
+for p in $PATH; do 
+    if [ -f $p/rc.exe ]; then 
+	if [ -n "`$p/rc.exe -? 2>&1 | grep -i "resource compiler"`" ]; then
+	    RCC=`echo "$p/rc.exe" | sed 's/ /\\\\ /g'`
+	fi
+    fi
+done
+IFS=$save_ifs
+
+if [ -z "$RCC" ]; then
+    echo 'rc.exe not found!' >&2
+    exit 1
+fi
+
+while test -n "$1" ; do
+    x="$1"
+    case "$x" in
+	-o)
+	    shift
+	    MPATH=`msys2win_path.sh -m $1`;
+	    OUTPUT_FILENAME="$MPATH";;
+	-o/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    OUTPUT_FILENAME="$MPATH";;
+	-I)
+	    shift
+	    MPATH=`msys2win_path.sh -m $1`;
+	    CMD="$CMD -I\"$MPATH\"";;
+	-I/*)
+	    y=`echo $x | sed 's,^-[Io]\(/.*\),\1,g'`;
+	    MPATH=`msys2win_path.sh -m $y`;
+	    CMD="$CMD -I\"$MPATH\"";;
+	/*)
+	    MPATH=`msys2win_path.sh -m $x`;
+	    CMD="$CMD \"$MPATH\"";; 
+	*)
+	    y=`echo $x | sed 's,",\\\",g'`;
+	    CMD="$CMD \"$y\"";;
+    esac
+    shift
+done
+p=$$
+if [ -n "$OUTPUT_FILENAME" ]; then
+    CMD="-Fo$OUTPUT_FILENAME $CMD"
+fi
+if [ "X$RC_SH_DEBUG_LOG" != "X" ]; then
+    echo rc.sh "$SAVE" >>$RC_SH_DEBUG_LOG
+    echo rc.exe $CMD >>$RC_SH_DEBUG_LOG
+fi
+eval $RCC "$CMD"  >/tmp/rc.exe.${p}.1 2>/tmp/rc.exe.${p}.2
+RES=$?
+tail +2 /tmp/rc.exe.${p}.2 >&2
+cat /tmp/rc.exe.${p}.1
+rm -f /tmp/rc.exe.${p}.2 /tmp/rc.exe.${p}.1
+exit $RES
diff --git a/erts/etc/win32/msys_tools/win2msys_path.sh b/erts/etc/win32/msys_tools/win2msys_path.sh
new file mode 100644
index 0000000000..6558a15ecd
--- /dev/null
+++ b/erts/etc/win32/msys_tools/win2msys_path.sh
@@ -0,0 +1,38 @@
+#! /bin/bash

+if [ -z "$1" ]; then

+    echo "Usage: $0 <path>" >&2

+    exit 1;

+fi

+

+MSYS_PATH=`echo "$1" | sed 's,^\([a-zA-Z]\):\\\\,/\L\1/,;s,\\\\,/,g'`

+if [ -z "$MSYS_PATH" ]; then

+    echo "$0: Could not translate $1 to msys format" >&2

+    exit 2;

+fi

+

+DELBLANK=`echo "$MSYS_PATH" | sed 's, ,,g'`

+

+if [ "X$DELBLANK" != "X$MSYS_PATH" ]; then

+    if [ -d "$MSYS_PATH" ]; then

+	C1=`(cd "$MSYS_PATH" && cmd //C "for %i in (".") do @echo %~fsi")`

+	MSYS_PATH=`echo "$C1" | sed 's,^\([a-zA-Z]\):\\\\,/\L\1/,;s,\\\\,/,g'`

+    else

+	MSYS_DIR=`dirname "$MSYS_PATH"`

+	MSYS_FILE=`basename "$MSYS_PATH"`

+	if [ -d "$MSYS_DIR" ]; then

+	    	C1=`(cd "$MSYS_DIR" && cmd //C "for %i in (".") do @echo %~fsi")`	

+		BAT_FILE=/tmp/w$$.bat

+		# I simply cannot get the quoting right for this, 

+		# need an intermediate bat file

+		cat > $BAT_FILE <<EOF

+@echo off

+for %%i in ("$MSYS_FILE") do @echo %%~snxi

+EOF

+		C2=`(cd "$MSYS_DIR" && cmd //C $BAT_FILE)`

+		rm -f $BAT_FILE

+		MSYS_PATH=`echo "$C1/$C2" | sed 's,^\([a-zA-Z]\):\\\\,/\L\1/,;s,\\\\,/,g;s," ", ,g'`

+	fi

+    fi

+fi		

+echo $MSYS_PATH

+exit 0
\ No newline at end of file
diff --git a/erts/etc/win32/win_erlexec.c b/erts/etc/win32/win_erlexec.c
index 0eed8e28b9..5bb8ed6c6c 100644
--- a/erts/etc/win32/win_erlexec.c
+++ b/erts/etc/win32/win_erlexec.c
@@ -30,6 +30,9 @@
 #include <winuser.h>
 #include <wincon.h>
 #include <process.h>
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
 #include "sys.h"
 #include "erl_driver.h"
 
diff --git a/erts/lib_src/Makefile.in b/erts/lib_src/Makefile.in
index 12b8732735..54ee7410fd 100644
--- a/erts/lib_src/Makefile.in
+++ b/erts/lib_src/Makefile.in
@@ -138,7 +138,7 @@ INCLUDES=-I$(ERTS_INCL) -I$(ERTS_INCL)/$(TARGET) -I$(ERTS_INCL_INT) -I$(ERTS_INC
 INCLUDES += -I../emulator/beam -I../emulator/sys/$(ERLANG_OSTYPE)
 
 USING_MINGW=@MIXED_CYGWIN_MINGW@
-USING_VC=@MIXED_CYGWIN_VC@
+USING_VC=@MIXED_VC@
 
 ifeq ($(USING_VC),yes)
 LIB_SUFFIX=.lib
diff --git a/lib/erl_interface/configure.in b/lib/erl_interface/configure.in
index abe1602be1..f17442b634 100644
--- a/lib/erl_interface/configure.in
+++ b/lib/erl_interface/configure.in
@@ -224,50 +224,8 @@ elif test "x$with_gmp" != "xno" -a -n "$with_gmp" ;then
     # FIXME return ERROR if no lib
 fi
 
-MIXED_CYGWIN=no
-
-AC_MSG_CHECKING(for mixed cygwin and native VC++ environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" != x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_VC=yes
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-
-AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_MINGW=yes
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_MINGW=no
-fi
-AC_SUBST(MIXED_CYGWIN_MINGW)
-
-AC_MSG_CHECKING(if we mix cygwin with any native compiler)
-if test "X$MIXED_CYGWIN" = "Xyes" ; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
-fi
-
-AC_SUBST(MIXED_CYGWIN)
+LM_WINDOWS_ENVIRONMENT
+	
 	
 dnl
 dnl Threads
diff --git a/lib/erl_interface/src/Makefile.in b/lib/erl_interface/src/Makefile.in
index 0d841cfa48..63bb339eca 100644
--- a/lib/erl_interface/src/Makefile.in
+++ b/lib/erl_interface/src/Makefile.in
@@ -39,7 +39,9 @@ include ../vsn.mk
 include $(TARGET)/eidefs.mk
 
 USING_MINGW=@MIXED_CYGWIN_MINGW@
-USING_VC=@MIXED_CYGWIN_VC@
+USING_MSYS_VC==@MIXED_MSYS_VC@
+USING_CYGWIN_VC==@MIXED_MSYS_VC@
+USING_VC=@MIXED_VC@
 
 ifdef TESTROOT
 RELEASE_PATH=$(TESTROOT)
diff --git a/lib/odbc/configure.in b/lib/odbc/configure.in
index 2369e16813..a9be4bf63f 100644
--- a/lib/odbc/configure.in
+++ b/lib/odbc/configure.in
@@ -63,22 +63,8 @@ AC_PROG_CC
 dnl ---------------------------------------------------------------------
 dnl Special windows stuff regarding CFLAGS and details in the environment...
 dnl ---------------------------------------------------------------------
-AC_MSG_CHECKING(for mixed cygwin and native VC++ environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_VC=yes
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-
+LM_WINDOWS_ENVIRONMENT
+	
 AC_PROG_MAKE_SET
 
 AC_CHECK_PROG(LD, ld.sh)
diff --git a/lib/tools/c_src/Makefile.in b/lib/tools/c_src/Makefile.in
index 6921193154..604332a91e 100644
--- a/lib/tools/c_src/Makefile.in
+++ b/lib/tools/c_src/Makefile.in
@@ -20,7 +20,7 @@ include $(ERL_TOP)/make/target.mk
 include $(ERL_TOP)/erts/include/internal/$(TARGET)/ethread.mk
 
 USING_MINGW=@MIXED_CYGWIN_MINGW@
-USING_VC=@MIXED_CYGWIN_VC@
+USING_VC=@MIXED_VC@
 
 CC=@CC@
 LD=@LD@
diff --git a/lib/wx/configure.in b/lib/wx/configure.in
index e5dc83b27e..930ef7ee77 100755
--- a/lib/wx/configure.in
+++ b/lib/wx/configure.in
@@ -67,53 +67,9 @@ AC_PROG_RANLIB
 AC_PROG_CPP
 
 AC_MSG_NOTICE(Building for [$host_os])
-MIXED_CYGWIN=no
 WXERL_CAN_BUILD_DRIVER=true
 
-AC_MSG_CHECKING(for mixed cygwin and native VC++ environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" != x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-Owx"		
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_VC=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_VC=no
-fi
-AC_SUBST(MIXED_CYGWIN_VC)
-
-AC_MSG_CHECKING(for mixed cygwin and native MinGW environment)
-if test "X$CC" = "Xcc.sh" -a "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then
-	if test -x /usr/bin/cygpath; then
-		CFLAGS="-O2"
-		MIXED_CYGWIN=yes
-		AC_MSG_RESULT([yes])
-		MIXED_CYGWIN_MINGW=yes
-		CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW"
-	else
-		AC_MSG_RESULT([undeterminable])
-		AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!)
-	fi
-else
-	AC_MSG_RESULT([no])
-	MIXED_CYGWIN_MINGW=no
-fi
-AC_SUBST(MIXED_CYGWIN_MINGW)
-
-AC_MSG_CHECKING(if we mix cygwin with any native compiler)
-if test "X$MIXED_CYGWIN" = "Xyes" ; then
-	AC_MSG_RESULT([yes])	
-else
-	AC_MSG_RESULT([no])
-fi
-
-AC_SUBST(MIXED_CYGWIN)
+LM_WINDOWS_ENVIRONMENT
 
 
 ## Check that we are in 32 bits mode on darwin 
@@ -348,7 +304,7 @@ dnl
 if test "$cross_compiling" = "yes"; then
     echo "Cross compilation of the wx driver is not supported yet, wx will NOT be usable" > ./CONF_INFO
     WXERL_CAN_BUILD_DRIVER=false
-elif test X"$MIXED_CYGWIN_VC" != X"yes" ; then
+elif test X"$MIXED_CYGWIN_VC" != X"yes"  -a X"$MIXED_MSYS_VC" != X"yes"; then
     m4_include(wxwin.m4)
 
     AM_OPTIONS_WXCONFIG
@@ -418,7 +374,11 @@ define(wx_warn_text,[
 else
     AC_MSG_CHECKING(for wxWidgets in standard locations)
 		  
-    CWXWIN_CONFIG=`cygpath $wx_config_name 2>/dev/null`
+    if test "x$MIXED_MSYS" = "xyes"; then
+        CWXWIN_CONFIG=`win2msys_path.sh $wx_config_name 2>/dev/null`
+    else
+	CWXWIN_CONFIG=`cygpath $wx_config_name 2>/dev/null`
+    fi
     CWXWIN1=`dirname $CWXWIN_CONFIG 2>/dev/null`
     CWXWIN2=`dirname $CWXWIN1 2>/dev/null`
 
@@ -426,7 +386,12 @@ else
        PROGRAMFILES=c:/Program Files
     fi
 
-    CWXWIN_PROG=`cygpath -d "$PROGRAMFILES" | cygpath -f - 2>/dev/null`
+    
+    if test "x$MIXED_MSYS" = "xyes"; then
+        CWXWIN_PROG=`win2msys_path.sh "$PROGRAMFILES" 2>/dev/null`
+    else
+	CWXWIN_PROG=`cygpath -d "$PROGRAMFILES" | cygpath -f - 2>/dev/null`
+    fi
     CWXWIN3=$CWXWIN_PROG/wxWidgets-2.8
     CWXWIN4=$CWXWIN_PROG/wxMSW-2.8
     CWX_DOCUMENTED="/opt/local/pgm/wxMSW-2.8.* /opt/local/pgm/wxWidgets-2.8.*"
diff --git a/otp_build b/otp_build
index 164e0b5f4e..15f6ec7a10 100755
--- a/otp_build
+++ b/otp_build
@@ -67,6 +67,7 @@ usage ()
     echo "Before trying to build on windows, consider the following option"
     echo "    env_win32 - echo environment settings for win32 with visual C++, use with eval"
     echo "    env_mingw32 - echo environment settings for win32 with MinGW, use with eval"
+    echo "    env_msys64 - echo environment settings for win32 with visual C++ running msys and mingw, use with eval"
     echo ""
     echo "Before trying to build for vxworks, consider the following option"
     echo "    env_vxworks <cpu>  - echo environment settings for vxworks, use with eval"
@@ -816,6 +817,63 @@ echo_env_mingw32 ()
     echo_envinfo
 }
 
+# N.B. In Erlang, and the build system, win32 means windows, so we keep
+# everything as terget win32, but add the CONFIG_SUBTYPE win64, which can
+# be handled by configure, setting WINDOWS_64BIT in headers and such
+echo_env_msys64 ()
+{
+    #echo_envinfo
+    if [ X"$SHELL" = X"" ]; then
+	echo "You need to export the shell variable first," \
+		"for bourne-like shells, type:" >&2
+	echo 'export SHELL' >&2
+	echo "and for csh-like shells, type:" >&2
+	echo 'setenv SHELL $SHELL' >&2
+	echo " - then try again." >&2
+	exit 1
+    fi
+    echo_env_erltop
+    # Try to cope with paths containing unexpected things like stray 
+    # mixed paths (c:/something/bin) and quotes. Only C and D drive
+    # handled.
+    P2=`echo :$PATH | \
+	sed "s,\",,g;s,:\([a-zA-Z]\):,:/\L\1,g;s,^:,,"`
+    P3=""
+    save_pwd=`pwd`
+    save_ifs=$IFS
+    IFS=:
+    for p in $P2; do
+	if [ -d "$p" ]; then
+	    #echo 'p =' "|$p|"
+	    C1=`(cd "$p" && cmd //C "for %i in (".") do @echo %~fsi")`
+	    #echo 'C1 =' "|$C1|"
+	    C2=`echo "$C1" | sed 's,^\([a-zA-Z]\):\\\\,/\L\1/,;s,\\\\,/,g'`
+	    #echo 'C2 =' "|$C2|"
+	else
+	    C2=""
+	fi
+	if [ ! -z "$C2" ]; then
+	    if [ -z "$P3" ];then 
+		P3="$C2"
+	    else 
+		P3="$P3:$C2"
+	    fi
+	fi
+    done
+    IFS=$save_ifs
+
+    echo_setenv OVERRIDE_TARGET win32 ';'
+    echo_setenv CONFIG_SUBTYPE win64 ';'
+    echo_setenv CC cc.sh ';'
+    echo_setenv CXX cc.sh ';'
+    echo_setenv AR ar.sh ';'
+    echo_setenv RANLIB true ';'
+    echo_setenv OVERRIDE_CONFIG_CACHE "$ERL_TOP/erts/autoconf/win64.config.cache" ';'
+    echo_setenv PATH "$ERL_TOP/erts/etc/win32/msys_tools/vc:$ERL_TOP/erts/etc/win32/msys_tools:$P3" ';'
+    echo_envinfo
+}
+
+
 lookup_prog_in_path ()
 {
     PROG=$1
@@ -1067,8 +1125,17 @@ case $TARGET in
 		exit 1
 	    fi
 	fi;;
+    *-mingw32)
+	if [ X"$OVERRIDE_TARGET" = X"" -a X"$1" != X"env_msys64"  ];then
+	    echo "Building for windows, you should do the " \
+		"following first:" >&2
+	    echo 'eval `./otp_build env_msys64`' >&2
+	    echo 'please note that there are backticks (``) in' \
+		'the command'
+	    exit 1
+	fi;;
 	*)
-	    ;;
+	;;
 esac
 
 if [ ! -z "$OVERRIDE_TARGET" ]; then
@@ -1198,6 +1265,8 @@ case "$1" in
 		echo_env_win32;;
 	env_mingw32)
 		echo_env_mingw32;;
+	env_msys64)
+		echo_env_msys64;;
 	env_vxworks)
 		echo_env_vxworks "$2";;
 	env_cross)