fix for various configs

libMesh · Jan 25, 2013 · 03e3121 · 03e3121
1 parent 52f192d
commit 03e3121
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/examples/fem_system/fem_system_ex2/fem_system_ex2.C b/examples/fem_system/fem_system_ex2/fem_system_ex2.C
@@ -136,6 +136,12 @@ void run_timestepping(EquationSystems& systems, GetPot& args) {
 
 int main(int argc, char** argv) {
 
+  // Skip this example if we do not meet certain requirements
+#ifndef LIBMESH_HAVE_VTK
+  std::cout << "This example requires VTK support - skipping.\n";
+  return 77;
+#endif
+
 	// Initialize libMesh and any dependent libraries
 	LibMeshInit init(argc, argv);
 

diff --git a/examples/fem_system/fem_system_ex2/solid_system.C b/examples/fem_system/fem_system_ex2/solid_system.C
@@ -343,15 +343,15 @@ bool SolidSystem::side_time_derivative(bool request_jacobian,
       // Assemble
       for (unsigned int i = 0; i < n_x_dofs; ++i) {
         for (unsigned int d1 = 0; d1 < c.dim; ++d1) {
-          if (isnan(diff(d1)))
+          if (libmesh_isnan(diff(d1)))
             continue;
           Real val = JxW[qp] * phi[i][qp] * diff(d1) * penalty_number;
           c.elem_subresiduals[var[d1]]->operator ()(i) += val;
         }
         if (request_jacobian) {
           for (unsigned int j = 0; j < n_x_dofs; ++j) {
             for (unsigned int d1 = 0; d1 < c.dim; ++d1) {
-              if (isnan(diff(d1)))
+              if (libmesh_isnan(diff(d1)))
                 continue;
               Real val = JxW[qp] * phi[i][qp] * phi[j][qp] * penalty_number;
               c.elem_subjacobians[var[d1]][var[d1]]->operator ()(i, j) += val;