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-rw-r--r--libio/libioP.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/libio/libioP.h b/libio/libioP.h
index 105ffccecc..4fb0d6aba5 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -87,6 +87,16 @@ extern "C" {
* object being acted on (i.e. the 'this' parameter).
*/
+#ifdef _LIBC
+# include <shlib-compat.h>
+# if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
+ /* Setting this macro disables the use of the _vtable_offset
+ bias in _IO_JUMPS_FUNCS, below. That is only needed if we
+ want to support old binaries (see oldfileops.c). */
+# define _G_IO_NO_BACKWARD_COMPAT 1
+# endif
+#endif
+
#if (!defined _IO_USE_OLD_IO_FILE \
&& (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
# define _IO_JUMPS_OFFSET 1