diff -Nur nlopt-2.3.orig/Makefile.am nlopt-2.3/Makefile.am
--- nlopt-2.3.orig/Makefile.am	2012-08-03 02:07:09.000000000 +0100
+++ nlopt-2.3/Makefile.am	2012-08-03 02:13:13.000000000 +0100
@@ -25,6 +25,7 @@
 
 if WITH_CXX
 libnlopt@NLOPT_SUFFIX@_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@
+libnlopt@NLOPT_SUFFIX@_la_LIBADD += -lstdc++
 else
 libnlopt@NLOPT_SUFFIX@_la_LDFLAGS = -no-undefined -version-info @SHARED_VERSION_INFO@
 endif
diff -Nur nlopt-2.3.orig/swig/Makefile.am nlopt-2.3/swig/Makefile.am
--- nlopt-2.3.orig/swig/Makefile.am	2012-08-03 02:07:09.000000000 +0100
+++ nlopt-2.3/swig/Makefile.am	2012-08-03 03:04:30.000000000 +0100
@@ -9,7 +9,7 @@
 # Guile wrapper
 
 libnlopt@NLOPT_SUFFIX@_guile_la_SOURCES = nlopt-guile.cpp
-libnlopt@NLOPT_SUFFIX@_guile_la_LIBADD = ../libnlopt@NLOPT_SUFFIX@.la
+libnlopt@NLOPT_SUFFIX@_guile_la_LIBADD = ../libnlopt@NLOPT_SUFFIX@.la @GUILE_LIBS@
 libnlopt@NLOPT_SUFFIX@_guile_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@
 libnlopt@NLOPT_SUFFIX@_guile_la_CPPFLAGS = $(GUILE_CPPFLAGS) -I$(top_builddir)/api