--- qwtplot3d/qwtplot3d.pro~	2007-05-20 23:51:50.000000000 +0800
+++ qwtplot3d/qwtplot3d.pro	2012-10-15 10:52:20.240534470 +0800
@@ -87,9 +87,11 @@
 SOURCES+=src/qwt3d_io_gl2ps.cpp \
          3rdparty/gl2ps/gl2ps.c
 
+unix:LIBS  += -lGLU
+
 # zlib support for gl2ps
 zlib {
   DEFINES += GL2PS_HAVE_ZLIB
   win32:LIBS += zlib.lib
 	unix:LIBS  += -lz
-}
\ No newline at end of file
+}