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xemacs-21.4 / configure.usage

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configure.usage

 --with-system-malloc    (Bool) Use the system malloc, instead of GNU malloc.
 --with-debug-malloc     (Bool) Use the debugging malloc package.
 --use-regex-malloc=no   (Bool) Use malloc (not alloca) for regex fail stack.
-                        Setting this to 'yes' allows unpreventable crashes.
+                        Setting this to 'no' allows crashes - it may be
+                        impossible to detect stack exhaustion, and your
+                        XEmacs will crash.
+
 
 Debugging options: