diff --git a/src/auto/configure b/src/auto/configure
index f455058..4ece95e 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -5893,10 +5893,19 @@
 
 fi
 
+	if ${vi_cv_dll_name_python+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
 
-	if test "X$python_DLLLIBRARY" != "X"; then
-	  python_INSTSONAME="$python_DLLLIBRARY"
-	fi
+	  if test "X$python_DLLLIBRARY" != "X"; then
+	    vi_cv_dll_name_python="$python_DLLLIBRARY"
+	  else
+	    vi_cv_dll_name_python="$python_INSTSONAME"
+	  fi
+
+fi
+
+
 	PYTHON_LIBS="${vi_cv_path_python_plibs}"
 	if test "${vi_cv_path_python_pfx}" = "${vi_cv_path_python_epfx}"; then
 	  PYTHON_CFLAGS="-I${vi_cv_path_python_pfx}/include/python${vi_cv_var_python_version} -DPYTHON_HOME='\"${vi_cv_path_python_pfx}\"'"
@@ -6200,19 +6209,28 @@
 	@echo "python3_DLLLIBRARY='$(DLLLIBRARY)'"
 	@echo "python3_INSTSONAME='$(INSTSONAME)'"
 eof
-                        eval "`cd ${PYTHON3_CONFDIR} && make -f "${tmp_mkf}" __ | sed '/ directory /d'`"
-            rm -f -- "${tmp_mkf}"
+	    	    eval "`cd ${PYTHON3_CONFDIR} && make -f "${tmp_mkf}" __ | sed '/ directory /d'`"
+	    rm -f -- "${tmp_mkf}"
 	    vi_cv_path_python3_plibs="-L${PYTHON3_CONFDIR} -lpython${vi_cv_var_python3_version}${vi_cv_var_python3_abiflags}"
-            vi_cv_path_python3_plibs="${vi_cv_path_python3_plibs} ${python3_BASEMODLIBS} ${python3_LIBS} ${python3_SYSLIBS}"
-                        vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-ltermcap//`
-            vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-lffi//`
+	    vi_cv_path_python3_plibs="${vi_cv_path_python3_plibs} ${python3_BASEMODLIBS} ${python3_LIBS} ${python3_SYSLIBS}"
+	    	    vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-ltermcap//`
+	    vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-lffi//`
+
+fi
+
+	if ${vi_cv_dll_name_python3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+	  if test "X$python3_DLLLIBRARY" != "X"; then
+	    vi_cv_dll_name_python3="$python3_DLLLIBRARY"
+	  else
+	    vi_cv_dll_name_python3="$python3_INSTSONAME"
+	  fi
 
 fi
 
 
-        if test "X$python3_DLLLIBRARY" != "X"; then
-	  python3_INSTSONAME="$python3_DLLLIBRARY"
-        fi
         PYTHON3_LIBS="${vi_cv_path_python3_plibs}"
         if test "${vi_cv_path_python3_pfx}" = "${vi_cv_path_python3_epfx}"; then
           PYTHON3_CFLAGS="-I${vi_cv_path_python3_pfx}/include/python${vi_cv_var_python3_version}${vi_cv_var_python3_abiflags} -DPYTHON3_HOME='L\"${vi_cv_path_python3_pfx}\"'"
@@ -6372,7 +6390,7 @@
     int main(int argc, char** argv)
     {
       int not_needed = 0;
-      if (no_rtl_global_needed_for("${python_INSTSONAME}", "${vi_cv_path_python_pfx}"))
+      if (no_rtl_global_needed_for("${vi_cv_dll_name_python}", "${vi_cv_path_python_pfx}"))
             not_needed = 1;
       return !not_needed;
     }
@@ -6438,7 +6456,7 @@
     int main(int argc, char** argv)
     {
       int not_needed = 0;
-      if (no_rtl_global_needed_for("${python3_INSTSONAME}", L"${vi_cv_path_python3_pfx}"))
+      if (no_rtl_global_needed_for("${vi_cv_dll_name_python3}", L"${vi_cv_path_python3_pfx}"))
             not_needed = 1;
       return !not_needed;
     }
@@ -6461,18 +6479,18 @@
 
   PYTHON_SRC="if_python.c"
   PYTHON_OBJ="objects/if_python.o"
-  PYTHON_CFLAGS="$PYTHON_CFLAGS -DDYNAMIC_PYTHON_DLL=\\\"${python_INSTSONAME}\\\""
+  PYTHON_CFLAGS="$PYTHON_CFLAGS -DDYNAMIC_PYTHON_DLL=\\\"${vi_cv_dll_name_python}\\\""
   PYTHON_LIBS=
   PYTHON3_SRC="if_python3.c"
   PYTHON3_OBJ="objects/if_python3.o"
-  PYTHON3_CFLAGS="$PYTHON3_CFLAGS -DDYNAMIC_PYTHON3_DLL=\\\"${python3_INSTSONAME}\\\""
+  PYTHON3_CFLAGS="$PYTHON3_CFLAGS -DDYNAMIC_PYTHON3_DLL=\\\"${vi_cv_dll_name_python3}\\\""
   PYTHON3_LIBS=
 elif test "$python_ok" = yes && test "$enable_pythoninterp" = "dynamic"; then
   $as_echo "#define DYNAMIC_PYTHON 1" >>confdefs.h
 
   PYTHON_SRC="if_python.c"
   PYTHON_OBJ="objects/if_python.o"
-  PYTHON_CFLAGS="$PYTHON_CFLAGS -DDYNAMIC_PYTHON_DLL=\\\"${python_INSTSONAME}\\\""
+  PYTHON_CFLAGS="$PYTHON_CFLAGS -DDYNAMIC_PYTHON_DLL=\\\"${vi_cv_dll_name_python}\\\""
   PYTHON_LIBS=
 elif test "$python_ok" = yes; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if -fPIE can be added for Python" >&5
@@ -6511,7 +6529,7 @@
 
   PYTHON3_SRC="if_python3.c"
   PYTHON3_OBJ="objects/if_python3.o"
-  PYTHON3_CFLAGS="$PYTHON3_CFLAGS -DDYNAMIC_PYTHON3_DLL=\\\"${python3_INSTSONAME}\\\""
+  PYTHON3_CFLAGS="$PYTHON3_CFLAGS -DDYNAMIC_PYTHON3_DLL=\\\"${vi_cv_dll_name_python3}\\\""
   PYTHON3_LIBS=
 elif test "$python3_ok" = yes; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if -fPIE can be added for Python3" >&5
@@ -11420,7 +11438,7 @@
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -11466,7 +11484,7 @@
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -11490,7 +11508,7 @@
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -11535,7 +11553,7 @@
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
@@ -11559,7 +11577,7 @@
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];