doc: say what we need from Gmsh

diff --git a/doc/readme.html b/doc/readme.html
index 521b76b73a5ed2d5cb0547a50a33d2db694572d0..d81fe9309f5f0ba616fef3c34cbed2bda7ef283e 100644 (file)
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@@ -429,7 +429,7 @@
                 <p>
                     <a href="http://gmsh.info/" target="_top"></a> is a 3D finite element mesh generator. The executable can be used to create meshes from within deal.II by specifying the relevant input data.
                     <a href="http://gmsh.info/" target="_top">Gmsh</a> should be readily packaged by most Linux distributions. (Don't forget to install a development version of the library). To use a self compiled version, specify
-                    <code>-DGMSH_DIR=/path/to/gmsh</code> on the command line.
+                    <code>-DGMSH_DIR=/path/to/gmsh</code> on the command line. Note that netgen, tetgen and blas support has to be enabled in Gmsh.
                 </p>
             </dd>