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-rw-r--r--configure.in4
1 files changed, 4 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index e8c8680e19..51728a847e 100644
--- a/configure.in
+++ b/configure.in
@@ -278,6 +278,10 @@ AC_ARG_ENABLE(builtin-zlib,
AS_HELP_STRING([--enable-builtin-zlib],
[force use of our own built-in zlib]))
+AC_ARG_ENABLE(sharing-preserving,
+AS_HELP_STRING([--enable-sharing-preserving],
+ [enable copying of terms without destroying sharing]))
+
dnl This functionality has been lost along the way... :(
dnl It could perhaps be nice to reintroduce some day; therefore,
dnl it is not removed just commented out.