diff --git a/configure b/configure
index 42edeae0c8..1b11ac5dc3 100755
--- a/configure
+++ b/configure
@@ -1040,6 +1040,7 @@ infodir
 docdir
 oldincludedir
 includedir
+runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -1460,6 +1461,7 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1712,6 +1714,15 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
+  -runstatedir | --runstatedir | --runstatedi | --runstated \
+  | --runstate | --runstat | --runsta | --runst | --runs \
+  | --run | --ru | --r)
+    ac_prev=runstatedir ;;
+  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+  | --run=* | --ru=* | --r=*)
+    runstatedir=$ac_optarg ;;
+
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1849,7 +1860,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir
+		libdir localedir mandir runstatedir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -2002,6 +2013,7 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -3991,7 +4003,7 @@ case "${host}" in
 
   ;;
 
-  *-*-cygwin* | *-*-mingw32* )
+  *-*-cygwin* | *-*-mingw32* | *-*-mingw64* )
                 PROGRAM_EXT=".exe"
     DEFAULT_DEFAULT_wxUSE_MSW=1
   ;;
@@ -27002,6 +27014,20 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
 
     if test "$wxUSE_QT" = 1; then
+        TOOLKIT=QT
+        GUIDIST=QT_DIST
+        TOOLKIT_DIR="qt"
+
+        if test -n "$QT5_CUSTOM_DIR" ; then
+                        TOOLKIT_INCLUDE="${TOOLKIT_INCLUDE} -I${QT5_CUSTOM_DIR}/include"
+            GUI_TK_LIBRARY="${GUI_TK_LIBRARY} -L${QT5_CUSTOM_DIR}/lib \
+                            -lQt5Core -lQt5Widgets -lQt5Gui -lQt5OpenGL -lQt5Test \
+                            -Wl,-rpath,${QT5_CUSTOM_DIR}/lib"
+
+        elif test -z "$PKG_CONFIG" ; then
+            as_fn_error $? "specify QT5_CUSTOM_DIR or make sure pkg-config is available to search for Qt5 libraries" "$LINENO" 5
+
+        else
 
 pkg_failed=no
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for QT5" >&5
@@ -27062,12 +27088,12 @@ fi
 	echo "$QT5_PKG_ERRORS" >&5
 
 
-                as_fn_error $? "Qt5 libraries are not available" "$LINENO" 5
+                    as_fn_error $? "Qt5 libraries are not available" "$LINENO" 5
 
 
 elif test $pkg_failed = untried; then
 
-                as_fn_error $? "Qt5 libraries are not available" "$LINENO" 5
+                    as_fn_error $? "Qt5 libraries are not available" "$LINENO" 5
 
 
 else
@@ -27076,9 +27102,6 @@ else
         { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 
-                TOOLKIT=QT
-                GUIDIST=QT_DIST
-                TOOLKIT_DIR="qt"
                 TOOLKIT_INCLUDE="${TOOLKIT_INCLUDE} ${QT5_CFLAGS}"
                 GUI_TK_LIBRARY="${GUI_TK_LIBRARY} ${QT5_LIBS}"
                 if `pkg-config --variable qt_config Qt5Core | grep "reduce_relocations" >/dev/null`; then
@@ -27087,6 +27110,7 @@ $as_echo "yes" >&6; }
                 fi
 
 fi
+        fi
     fi
         TOOLKIT_DIR=`echo ${TOOLKIT} | tr '[A-Z]' '[a-z]'`
 
@@ -29855,7 +29879,7 @@ EOF
                                         HEADER_PAD_OPTION="-headerpad_max_install_names"
       ;;
 
-      *-*-cygwin* | *-*-mingw32* )
+      *-*-cygwin* | *-*-mingw32* | *-*-mingw64* )
         ;;
 
       *-*-hpux* )
@@ -39632,7 +39656,7 @@ fi
 
     LDFLAGS_GUI=
     case ${BAKEFILE_HOST} in
-        *-*-cygwin* | *-*-mingw32* )
+        *-*-cygwin* | *-*-mingw32* | *-*-mingw64* )
         LDFLAGS_GUI="-mwindows"
     esac
 
@@ -40066,7 +40090,7 @@ fi
         fi
       ;;
 
-      *-*-cygwin* | *-*-mingw32* )
+      *-*-cygwin* | *-*-mingw32* | *-*-mingw64* )
         PIC_FLAG=""
         SHARED_LD_CC="\$(CC) -shared -o"
         SHARED_LD_CXX="\$(CXX) -shared -o"
@@ -40311,7 +40335,7 @@ EOF
 
 
     case ${BAKEFILE_HOST} in
-        *-*-cygwin* | *-*-mingw32* )
+        *-*-cygwin* | *-*-mingw32* | *-*-mingw64* )
                         if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}windres", so it can be a program name with args.
 set dummy ${ac_tool_prefix}windres; ac_word=$2