diff -up Ipopt/src/Interfaces/Makefile.in.orig Ipopt-3.11.8/src/Interfaces/Makefile.in
--- Ipopt/src/Interfaces/Makefile.in.orig 2014-07-09 23:28:58.312819799 -0300
+++ Ipopt/src/Interfaces/Makefile.in 2014-07-09 23:29:08.476820189 -0300
@@ -391,7 +391,7 @@
IpTNLPAdapter.cpp IpTNLPAdapter.hpp \
IpTNLPReducer.cpp IpTNLPReducer.hpp
-libipopt_la_LIBADD = $(IPALLLIBS) $(am__append_1)
+libipopt_la_LIBADD = $(IPALLLIBS) $(am__append_1) -ldl
libipopt_la_DEPENDENCIES = $(IPALLLIBS)
libipopt_la_LDFLAGS = $(LT_LDFLAGS)