diff --git a/src/configure.in b/src/configure.in
index e9ffa7b..ffa0b2d 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1219,7 +1219,7 @@
 	      vi_cv_path_python_plibs=`echo $vi_cv_path_python_plibs | sed s/-ltermcap//`
 	    fi
 	])
-	AC_CACHE_VAL(vi_cv_dll_name_python,
+	AC_CACHE_CHECK(Python's dll name,vi_cv_dll_name_python,
 	[
 	  if test "X$python_DLLLIBRARY" != "X"; then
 	    vi_cv_dll_name_python="$python_DLLLIBRARY"
@@ -1428,7 +1428,7 @@
 	    vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-ltermcap//`
 	    vi_cv_path_python3_plibs=`echo $vi_cv_path_python3_plibs | sed s/-lffi//`
 	])
-	AC_CACHE_VAL(vi_cv_dll_name_python3,
+	AC_CACHE_CHECK(Python3's dll name,vi_cv_dll_name_python3,
 	[
 	  if test "X$python3_DLLLIBRARY" != "X"; then
 	    vi_cv_dll_name_python3="$python3_DLLLIBRARY"
@@ -1540,7 +1540,7 @@
     int no_rtl_global_needed_for(char *python_instsoname, char *prefix)
     {
       int needed = 0;
-      void* pylib = dlopen(python_instsoname, RTLD_LAZY);
+      void* pylib = dlopen(python_instsoname, RTLD_LAZY|RTLD_LOCAL);
       if (pylib != 0)
       {
           void (*pfx)(char *home) = dlsym(pylib, "Py_SetPythonHome");
@@ -1586,7 +1586,7 @@
     int no_rtl_global_needed_for(char *python_instsoname, wchar_t *prefix)
     {
       int needed = 0;
-      void* pylib = dlopen(python_instsoname, RTLD_LAZY);
+      void* pylib = dlopen(python_instsoname, RTLD_LAZY|RTLD_LOCAL);
       if (pylib != 0)
       {
           void (*pfx)(wchar_t *home) = dlsym(pylib, "Py_SetPythonHome");