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-rw-r--r--config.h.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in
index 1f417989d2..af82128eea 100644
--- a/config.h.in
+++ b/config.h.in
@@ -56,6 +56,9 @@
 /* Define if versioning of the library is wanted.  */
 #undef	DO_VERSIONING
 
+/* Defined to the oldest ABI we support, like 2.1.  */
+#undef GLIBC_OLDEST_ABI
+
 /* Define if static NSS modules are wanted.  */
 #undef	DO_STATIC_NSS