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-rw-r--r--erts/emulator/beam/global.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index a5e6ff6f1c..3e1f3664bc 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -1044,6 +1044,8 @@ void erl_error(char*, va_list);
#if defined(SHCOPY_SEND) \
|| defined(SHCOPY_SPAWN)
#define SHCOPY
+/* Use this if you want sharing-preserving copy to be initially disabled */
+#undef SHCOPY_DISABLE
/* Use this with care, it is *very* verbose! */
#undef SHCOPY_DEBUG
#endif