+Sun Jun 22 19:12:58 1997 Jim Blandy <jimb@floss.red-bean.com>
+
+ * __scm.h: (SCM_FENCE): New macro: optimizer will not move code
+ across this. Only works on GCC. Otherwise, we hope for the best.
+ (SCM_DEFER_INTS, SCM_ALLOW_INTS): Use FENCE appropriately. I have
+ the feeling that real thread systems will not need this...
+
Sun Jun 22 15:46:35 1997 Jim Blandy <jimb@floss.red-bean.com>
Try to detect when people are using one version of libguile and a