Enable conservative stack scanning for all architectures.

[gnu-emacs] / src / lisp.h

diff --git a/src/lisp.h b/src/lisp.h
index 22e0a188e4b133ba500abb22034591ac98a589b9..3b7af46fdde201360bfae36c0cd7b3ae3fd58408 100644 (file)
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2217,8 +2217,12 @@ struct gcpro
    2    Mark the stack, and check that everything GCPRO'd is
        marked.
    3   Mark using GCPRO's, mark stack last, and count how many
-       dead objects are kept alive.  */
+       dead objects are kept alive.
 
+   Formerly, method 0 was used.  Currently, method 1 is used unless
+   otherwise specified by hand when building, e.g.,
+   "make CPPFLAGS='-DGC_MARK_STACK=GC_USE_GCPROS_AS_BEFORE'".
+   Methods 2 and 3 are present mainly to debug the transition from 0 to 1.  */
 
 #define GC_USE_GCPROS_AS_BEFORE                0
 #define GC_MAKE_GCPROS_NOOPS           1