--- foo/foo/foo/boost/math/special_functions/fpclassify.hpp
+++ foo/foo/foo/boost/math/special_functions/fpclassify.hpp
@@ -100,6 +100,7 @@
 #ifdef isnan
    return isnan(t);
 #elif defined(BOOST_MATH_DISABLE_STD_FPCLASSIFY) || !defined(BOOST_HAS_FPCLASSIFY)
+   (void) t;
    return false;
 #else // BOOST_HAS_FPCLASSIFY
    return (BOOST_FPCLASSIFY_PREFIX fpclassify(t) == (int)FP_NAN);
--- foo/foo/foo/boost/multi_array/base.hpp
+++ foo/foo/foo/boost/multi_array/base.hpp
@@ -501,6 +501,7 @@
       // the "far side" of the range (the top if stride is positive, the bottom
       // if stride is negative).
       index bound_adjustment = stride < 0 ? 1 : 0;
+      (void) bound_adjustment;
       BOOST_ASSERT(((index_bases[n] - bound_adjustment) <= finish) &&
         (finish <= (index_bases[n] + index(extents[n]) - bound_adjustment)));
 #endif // BOOST_DISABLE_ASSERTS
--- foo/foo/foo/boost/unordered/detail/table.hpp
+++ foo/foo/foo/boost/unordered/detail/table.hpp
@@ -458,6 +458,7 @@
             // According to 23.2.1.8, if propagate_on_container_swap is
             // false the behaviour is undefined unless the allocators
             // are equal.
+            (void) other;
             BOOST_ASSERT(node_alloc() == other.node_alloc());
         }