diff --git a/internal/ceres/line_search.cc b/internal/ceres/line_search.cc
index a396691..bacad48 100644
--- a/internal/ceres/line_search.cc
+++ b/internal/ceres/line_search.cc
@@ -276,7 +276,7 @@
                        "satisfying the sufficient decrease condition within "
                        "specified max_num_iterations: %d.",
                        options().max_num_iterations);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return;
     }
 
@@ -294,7 +294,7 @@
           StringPrintf("Line search failed: step_size too small: %.5e "
                        "with descent_direction_max_norm: %.5e.", step_size,
                        descent_direction_max_norm);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return;
     }
 
@@ -547,15 +547,16 @@
       // conditions, or a valid bracket containing such a point. Stop searching
       // and set bracket_low to the size size amongst all those tested which
       // minimizes f() and satisfies the Armijo condition.
-      LOG(WARNING) << "Line search failed: Wolfe bracketing phase shrank "
-                   << "bracket width: " << fabs(current.x - previous.x)
-                   <<  ", to < tolerance: " << options().min_step_size
-                   << ", with descent_direction_max_norm: "
-                   << descent_direction_max_norm << ", and failed to find "
-                   << "a point satisfying the strong Wolfe conditions or a "
-                   << "bracketing containing such a point. Accepting "
-                   << "point found satisfying Armijo condition only, to "
-                   << "allow continuation.";
+      LOG_IF(WARNING, !options().is_silent)
+          << "Line search failed: Wolfe bracketing phase shrank "
+          << "bracket width: " << fabs(current.x - previous.x)
+          <<  ", to < tolerance: " << options().min_step_size
+          << ", with descent_direction_max_norm: "
+          << descent_direction_max_norm << ", and failed to find "
+          << "a point satisfying the strong Wolfe conditions or a "
+          << "bracketing containing such a point. Accepting "
+          << "point found satisfying Armijo condition only, to "
+          << "allow continuation.";
       *bracket_low = current;
       break;
 
@@ -568,7 +569,7 @@
                        "find a point satisfying strong Wolfe conditions, or a "
                        "bracket containing such a point within specified "
                        "max_num_iterations: %d", options().max_num_iterations);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       // Ensure that bracket_low is always set to the step size amongst all
       // those tested which minimizes f() and satisfies the Armijo condition
       // when we terminate due to the 'artificial' max_num_iterations condition.
@@ -607,7 +608,7 @@
           StringPrintf("Line search failed: step_size too small: %.5e "
                        "with descent_direction_max_norm: %.5e", step_size,
                        descent_direction_max_norm);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return false;
     }
 
@@ -691,7 +692,7 @@
                      initial_position.ToDebugString().c_str(),
                      bracket_low.ToDebugString().c_str(),
                      bracket_high.ToDebugString().c_str());
-    LOG(WARNING) << summary->error;
+    LOG_IF(WARNING, !options().is_silent) << summary->error;
     solution->value_is_valid = false;
     return false;
   }
@@ -712,7 +713,7 @@
                        "within specified max_num_iterations: %d, "
                        "(num iterations taken for bracketing: %d).",
                        options().max_num_iterations, num_bracketing_iterations);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return false;
     }
     if (fabs(bracket_high.x - bracket_low.x) * descent_direction_max_norm
@@ -724,7 +725,7 @@
                        "too small with descent_direction_max_norm: %.5e.",
                        fabs(bracket_high.x - bracket_low.x),
                        descent_direction_max_norm);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return false;
     }
 
@@ -775,7 +776,7 @@
                        "between low_step: %.5e and high_step: %.5e "
                        "at which function is valid.",
                        solution->x, bracket_low.x, bracket_high.x);
-      LOG(WARNING) << summary->error;
+      LOG_IF(WARNING, !options().is_silent) << summary->error;
       return false;
     }
 
diff --git a/internal/ceres/line_search.h b/internal/ceres/line_search.h
index 5f24e9f..57ef9e7 100644
--- a/internal/ceres/line_search.h
+++ b/internal/ceres/line_search.h
@@ -71,6 +71,7 @@
           max_num_iterations(20),
           sufficient_curvature_decrease(0.9),
           max_step_expansion(10.0),
+          is_silent(false),
           function(NULL) {}
 
     // Degree of the polynomial used to approximate the objective
@@ -144,6 +145,8 @@
     // By definition for expansion, max_step_expansion > 1.0.
     double max_step_expansion;
 
+    bool is_silent;
+
     // The one dimensional function that the line search algorithm
     // minimizes.
     Function* function;