X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=configure.in;h=21eea5f87136e2f7307e87b48eba366e5f428739;hb=86d2d7dd6a95f99b1c7608f594dd441318030ef1;hp=b161cceb639f9409bbc5302974bbe7498555d52a;hpb=758c508d8882135f6cdc651f6d45161bceef3f1c;p=ghc-hetmet.git

diff --git a/configure.in b/configure.in
index b161cce..21eea5f 100644
--- a/configure.in
+++ b/configure.in
@@ -851,8 +851,12 @@ if test "$HaveLibReadline"; then
   AC_CHECK_LIB(readline, rl_erase_empty_line,
     [AC_DEFINE(HAVE_READLINE_4, 1)],
     [AC_DEFINE(HAVE_READLINE_4, 0)])
+  AC_CHECK_LIB(readline, rl_free_undo_list,
+    [AC_DEFINE(HAVE_READLINE_4_2, 1)],
+    [AC_DEFINE(HAVE_READLINE_4_2, 0)])
 else
   AC_DEFINE(HAVE_READLINE_4, 0)
+  AC_DEFINE(HAVE_READLINE_4_2, 0)
 fi
 
 dnl ** check for math library