Link _fileio statically -- it is needed during initialization.
diff --git a/Modules/Setup.dist b/Modules/Setup.dist
index 7e098a8..6a7a54d 100644
--- a/Modules/Setup.dist
+++ b/Modules/Setup.dist
@@ -115,6 +115,7 @@
# if $HOME is not set
_sre _sre.c # Fredrik Lundh's new regular expressions
_codecs _codecsmodule.c # access to the builtin codecs and codec registry
+_fileio _fileio.c # Standard I/O baseline
# The zipimport module is always imported at startup. Having it as a
# builtin module avoids some bootstrapping problems and reduces overhead.