final patches from Neil Schemenauer for garbage collection
diff --git a/PC/config.c b/PC/config.c
index f295f85..0ff4c93 100644
--- a/PC/config.c
+++ b/PC/config.c
@@ -43,6 +43,9 @@
#endif
extern void initcmath();
extern void initerrno();
+#ifdef WITH_CYCLE_GC
+extern void initgc();
+#endif
#ifndef MS_WIN64
extern void initimageop();
#endif
@@ -89,6 +92,9 @@
#endif
{"cmath", initcmath},
{"errno", initerrno},
+#ifdef WITH_CYCLE_GC
+ {"gc", initgc},
+#endif
#ifndef MS_WIN64
{"imageop", initimageop},
#endif
diff --git a/PC/config.h b/PC/config.h
index dfe5118..43bb35f 100644
--- a/PC/config.h
+++ b/PC/config.h
@@ -451,6 +451,9 @@
/* Define if you want to use the GNU readline library */
/* #define WITH_READLINE 1 */
+/* Define if you want cycle garbage collection */
+/* #define WITH_CYCLE_GC 1 */
+
/* Define if you have clock. */
/* #define HAVE_CLOCK */