diff -up R-2.8.0/configure.BAD R-2.8.0/configure
--- R-2.8.0/configure.BAD	2008-10-26 11:51:56.000000000 -0400
+++ R-2.8.0/configure	2008-10-26 11:52:31.000000000 -0400
@@ -44779,6 +44779,11 @@ else
   have_bzlib=no
 fi
 if test "x${have_bzlib}" = xyes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_BZLIB_H 1
+_ACEOF
+
 { echo "$as_me:$LINENO: checking if bzip2 version >= 1.0.5" >&5
 echo $ECHO_N "checking if bzip2 version >= 1.0.5... $ECHO_C" >&6; }
 if test "${r_cv_have_bzlib+set}" = set; then
diff -up R-2.8.0/m4/R.m4.BAD R-2.8.0/m4/R.m4
--- R-2.8.0/m4/R.m4.BAD	2008-09-21 18:05:06.000000000 -0400
+++ R-2.8.0/m4/R.m4	2008-10-26 11:53:05.000000000 -0400
@@ -3055,6 +3055,7 @@ else
   have_bzlib=no
 fi
 if test "x${have_bzlib}" = xyes; then
+AC_DEFINE(HAVE_BZLIB_H, 1, [Define to 1 if you have bzlib.h.])
 AC_CACHE_CHECK([if bzip2 version >= 1.0.5], [r_cv_have_bzlib],
 [AC_LANG_PUSH(C)
 r_save_LIBS="${LIBS}"