implemented tarval_abs, tarval_is_negative

[libfirm] / configure.in

diff --git a/configure.in b/configure.in
index 026eb1b..895f7b7 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -94,6 +94,8 @@ AC_PROG_RANLIB
 
 AC_PROG_INSTALL
 
+AC_PROG_LN_S
+
 dnl check for robodoc if enabled
 dnl ----------------------------
 if test "$enable_auto_documentation" = yes; then