Index: subversion/libsvn_fs_util/sqlite-util.c
===================================================================
--- subversion/libsvn_fs_util/sqlite-util.c	(revision 27979)
+++ subversion/libsvn_fs_util/sqlite-util.c	(working copy)
@@ -21,8 +21,13 @@
 #include <ctype.h>
 #include <assert.h>
 
+#include <apr.h>
+#include <apr_errno.h>
 #include <apr_general.h>
 #include <apr_pools.h>
+#ifndef SVN_HAVE_SQLITE_THREADSAFE_PREDICATE
+#include <apr_dso.h>
+#endif
 
 #include <sqlite3.h>
 
@@ -204,6 +209,31 @@
 #ifdef SVN_HAVE_SQLITE_THREADSAFE_PREDICATE
   /* sqlite3_threadsafe() was available at Subversion 'configure'-time. */
   is_threadsafe = sqlite3_threadsafe();
+#else
+#if APR_HAS_DSO
+  /* Attempt to dynamically load sqlite3_threadsafe(), since the
+     version of SQLite present at compile-time may've changed. */
+  apr_status_t status;
+  apr_dso_handle_t *dso = NULL;
+  apr_dso_handle_sym_t symbol;
+
+#if DARWIN
+  status = apr_dso_load(&dso, "libsqlite3.dylib", pool);
+#endif
+  if (dso == NULL)
+    status = apr_dso_load(&dso, "libsqlite3.so", pool);
+
+  if (status == APR_SUCCESS && dso)
+    {
+      status = apr_dso_sym(&symbol, dso, "sqlite3_threadsafe");
+      if (status == APR_SUCCESS && symbol)
+        {
+          int (*threadsafe_func)(void) = symbol;
+          is_threadsafe = (*threadsafe_func)();
+        }
+      status = apr_dso_unload(dso);
+    }
+#endif  /* APR_HAS_DSO */
 #endif  /* SVN_HAVE_SQLITE_THREADSAFE_PREDICATE */
 
   if (! is_threadsafe)