r80478 converts all obsolete AC_TRY_* macros to AC_*_IFELSE, the outcome is ... nothing (but whitespace changes):
$ svn diff --diff-cmd diff -x -uEwB configure
Index: configure
===================================================================
--- configure (Revision 80475)
+++ configure (Arbeitskopie)
@@ -1,5 +1,5 @@
#! /bin/sh
-# From configure.in Revision: 80474 .
+# From configure.in Revision: 80475 .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.65 for python 3.2.
#
running configure with the old and the new version shows no diffs (besides config.log).