Remove the configure option for disabling the reference cycle GC.
diff --git a/configure b/configure
index c2f7c02..48d4cd4 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
#! /bin/sh
-# From configure.in Revision: 1.325 .
+# From configure.in Revision: 1.327 .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.53.
#
@@ -843,7 +843,6 @@
--with(out)-threads=DIRECTORY disable/enable thread support
--with(out)-thread=DIRECTORY deprecated; use --with(out)-threads
--with-pth use GNU pth threading libraries
- --with(out)-cycle-gc disable/enable garbage collection
--with(out)-universal-newlines disable/enable foreign newlines
--with(out)-doc-strings disable/enable documentation strings
--with(out)-pymalloc disable/enable specialized mallocs
@@ -11055,30 +11054,6 @@
fi
fi
-# Check for GC support
-echo "$as_me:$LINENO: checking for --with-cycle-gc" >&5
-echo $ECHO_N "checking for --with-cycle-gc... $ECHO_C" >&6
-
-# Check whether --with-cycle-gc or --without-cycle-gc was given.
-if test "${with_cycle_gc+set}" = set; then
- withval="$with_cycle_gc"
-
-fi;
-
-if test -z "$with_cycle_gc"
-then with_cycle_gc="yes"
-fi
-if test "$with_cycle_gc" != "no"
-then
-
-cat >>confdefs.h <<\_ACEOF
-#define WITH_CYCLE_GC 1
-_ACEOF
-
-fi
-echo "$as_me:$LINENO: result: $with_cycle_gc" >&5
-echo "${ECHO_T}$with_cycle_gc" >&6
-
# Check for universal newline support
echo "$as_me:$LINENO: checking for --with-universal-newline" >&5
echo $ECHO_N "checking for --with-universal-newline... $ECHO_C" >&6
@@ -11443,7 +11418,6 @@
-
for ac_func in alarm chown chroot clock confstr ctermid ctermid_r execv \
fchdir flock fork fsync fdatasync fpathconf ftime ftruncate \
gai_strerror getgroups getlogin getpeername getpgid getpid getpwent getwd \
diff --git a/configure.in b/configure.in
index edf7d3a..57d9a4a 100644
--- a/configure.in
+++ b/configure.in
@@ -1453,21 +1453,6 @@
fi
fi
-# Check for GC support
-AC_MSG_CHECKING(for --with-cycle-gc)
-AC_ARG_WITH(cycle-gc,
-[ --with(out)-cycle-gc disable/enable garbage collection])
-
-if test -z "$with_cycle_gc"
-then with_cycle_gc="yes"
-fi
-if test "$with_cycle_gc" != "no"
-then
- AC_DEFINE(WITH_CYCLE_GC, 1,
- [Define if you want to compile in cycle garbage collection.])
-fi
-AC_MSG_RESULT($with_cycle_gc)
-
# Check for universal newline support
AC_MSG_CHECKING(for --with-universal-newline)
AC_ARG_WITH(universal-newlines,