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-rw-r--r--configure.in11
1 files changed, 11 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index 97240bcc43..ed15555834 100644
--- a/configure.in
+++ b/configure.in
@@ -82,6 +82,17 @@ AC_ARG_WITH(headers, dnl
                           [default=compiler default]],
 	    sysheaders=$withval, sysheaders='')
 
+AC_ARG_WITH(oldest-abi, dnl
+[  --with-oldest-abi=ABI   the oldest ABI supported [e.g. 2.2]
+                          [default=glibc default]],
+	    oldest_abi=$withval, oldest_abi='')
+if test ! -z "$oldest_abi"; then
+  AC_DEFINE_UNQUOTED(GLIBC_OLDEST_ABI, "$oldest_abi")
+else
+  oldest_abi=default
+fi
+AC_SUBST(oldest_abi)
+
 AC_ARG_ENABLE(libio, dnl
 [  --enable-libio          build in GNU libio instead of GNU stdio],
  	      [if test $enableval = yes; then