diff --git a/interface/src/avatar/MyAvatar.cpp b/interface/src/avatar/MyAvatar.cpp
index 57af9e732d..8595fa850e 100644
--- a/interface/src/avatar/MyAvatar.cpp
+++ b/interface/src/avatar/MyAvatar.cpp
@@ -1608,7 +1608,6 @@ void MyAvatar::updateOrientation(float deltaTime) {
     // Comfort Mode: If you press any of the left/right rotation drive keys or input, you'll
     // get an instantaneous 15 degree turn. If you keep holding the key down you'll get another
     // snap turn every half second.
-    quint64 now = usecTimestampNow();
     if (_driveKeys[STEP_YAW] != 0.0f) {
         totalBodyYaw += _driveKeys[STEP_YAW];
     }
@@ -1676,8 +1675,6 @@ glm::vec3 MyAvatar::applyKeyboardMotor(float deltaTime, const glm::vec3& localVe
     float motorEfficiency = glm::clamp(deltaTime / timescale, 0.0f, 1.0f);
 
     glm::vec3 newLocalVelocity = localVelocity;
-    float stepControllerInput = fabsf(_driveKeys[STEP_TRANSLATE_Z]) + fabsf(_driveKeys[STEP_TRANSLATE_Z]) + fabsf(_driveKeys[STEP_TRANSLATE_Z]);
-    quint64 now = usecTimestampNow();
 
     // FIXME how do I implement step translation as well?
 
diff --git a/libraries/animation/src/AnimInverseKinematics.cpp b/libraries/animation/src/AnimInverseKinematics.cpp
index 6355426dae..d5728b79b4 100644
--- a/libraries/animation/src/AnimInverseKinematics.cpp
+++ b/libraries/animation/src/AnimInverseKinematics.cpp
@@ -160,7 +160,7 @@ void AnimInverseKinematics::solveWithCyclicCoordinateDescent(const std::vector<I
                 continue;
             }
             int pivotsParentIndex = _skeleton->getParentIndex(pivotIndex);
-            if (pivotsParentIndex == -1 || pivotIndex == _hipsIndex) {
+            if (pivotsParentIndex == -1) {
                 // TODO?: handle case where tip's parent is root?
                 continue;
             }
@@ -173,7 +173,7 @@ void AnimInverseKinematics::solveWithCyclicCoordinateDescent(const std::vector<I
             glm::quat tipParentRotation = absolutePoses[pivotIndex].rot;
 
             // descend toward root, pivoting each joint to get tip closer to target
-            while (pivotsParentIndex != _hipsIndex && pivotsParentIndex != -1) {
+            while (pivotIndex != _hipsIndex && pivotsParentIndex != -1) {
                 // compute the two lines that should be aligned
                 glm::vec3 jointPosition = absolutePoses[pivotIndex].trans;
                 glm::vec3 leverArm = tipPosition - jointPosition;
@@ -285,7 +285,7 @@ void AnimInverseKinematics::solveWithCyclicCoordinateDescent(const std::vector<I
         // only update the absolutePoses that need it: those between lowestMovedIndex and _maxTargetIndex
         for (int i = lowestMovedIndex; i <= _maxTargetIndex; ++i) {
             int parentIndex = _skeleton->getParentIndex(i);
-            if (parentIndex != -1 && parentIndex != _hipsIndex) {
+            if (parentIndex != -1) {
                 absolutePoses[i] = absolutePoses[parentIndex] * _relativePoses[i];
             }
         }
@@ -295,7 +295,7 @@ void AnimInverseKinematics::solveWithCyclicCoordinateDescent(const std::vector<I
     for (auto& target: targets) {
         int tipIndex = target.getIndex();
         int parentIndex = _skeleton->getParentIndex(tipIndex);
-        if (parentIndex != -1 && parentIndex != _hipsIndex) {
+        if (parentIndex != -1) {
             const glm::quat& targetRotation = target.getRotation();
             // compute tip's new parent-relative rotation
             // Q = Qp * q   -->   q' = Qp^ * Q
diff --git a/libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp b/libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
index 6f3b40eb1e..41cf3b9bbf 100644
--- a/libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
+++ b/libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
@@ -218,7 +218,6 @@ void RenderableParticleEffectEntityItem::updateRenderItem() {
     _vertices.clear();
 
     // build vertices from particle positions and radiuses
-    glm::vec3 frustumPosition = frustum->getPosition();
     glm::vec3 dir = frustum->getDirection();
     for (auto&& particle : particleDetails) {
         glm::vec3 right = glm::normalize(glm::cross(glm::vec3(0.0f, 1.0f, 0.0f), dir));
diff --git a/libraries/recording/src/recording/Deck.cpp b/libraries/recording/src/recording/Deck.cpp
index a80fc43204..f0db37078b 100644
--- a/libraries/recording/src/recording/Deck.cpp
+++ b/libraries/recording/src/recording/Deck.cpp
@@ -6,4 +6,7 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
-#include "Deck.h"
+
+// FIXME -- DO NOT include headers in empty CPP files, it produces warnings. Once we define new symbols
+// and some actual code here, we can uncomment this include.
+//#include "Deck.h"
diff --git a/libraries/recording/src/recording/Frame.cpp b/libraries/recording/src/recording/Frame.cpp
index 211f192c0a..aac8a4d9c3 100644
--- a/libraries/recording/src/recording/Frame.cpp
+++ b/libraries/recording/src/recording/Frame.cpp
@@ -80,6 +80,7 @@ FrameType Frame::registerFrameType(const QString& frameTypeName) {
     std::call_once(once, [&] {
         auto headerType = frameTypes.registerValue("com.highfidelity.recording.Header");
         Q_ASSERT(headerType == Frame::TYPE_HEADER);
+        Q_UNUSED(headerType); // FIXME - build system on unix still not upgraded to Qt 5.5.1 so Q_ASSERT still produces warnings
     });
     return frameTypes.registerValue(frameTypeName);
 }
diff --git a/libraries/render-utils/src/Model.cpp b/libraries/render-utils/src/Model.cpp
index 6aae7ad1cb..5b9bfdca3d 100644
--- a/libraries/render-utils/src/Model.cpp
+++ b/libraries/render-utils/src/Model.cpp
@@ -135,9 +135,6 @@ void Model::reset() {
         const FBXGeometry& geometry = _geometry->getFBXGeometry();
         _rig->reset(geometry.joints);
     }
-    _meshGroupsKnown = false;
-    _readyWhenAdded = false; // in case any of our users are using scenes
-    invalidCalculatedMeshBoxes(); // if we have to reload, we need to assume our mesh boxes are all invalid
 }
 
 bool Model::updateGeometry() {
@@ -1156,6 +1153,9 @@ void Model::segregateMeshGroups() {
         return;
     }
 
+    Q_ASSERT(_renderItems.isEmpty()); // We should not have any existing renderItems if we enter this section of code
+    Q_ASSERT(_renderItemsSet.isEmpty()); // We should not have any existing renderItemsSet if we enter this section of code
+
     _renderItemsSet.clear();
 
     // Run through all of the meshes, and place them into their segregated, but unsorted buckets
diff --git a/tests/recording/src/main.cpp b/tests/recording/src/main.cpp
index 836d8b5ac1..f4049b04b7 100644
--- a/tests/recording/src/main.cpp
+++ b/tests/recording/src/main.cpp
@@ -12,8 +12,6 @@
 
 #include "Constants.h"
 
-#define QVERIFY Q_ASSERT
-
 using namespace recording;
 FrameType TEST_FRAME_TYPE { Frame::TYPE_INVALID };
 
@@ -30,7 +28,8 @@ void testFrameTypeRegistration() {
     auto backMap = recording::Frame::getFrameTypeNames();
     QVERIFY(backMap.count(TEST_FRAME_TYPE) == 1);
     QVERIFY(backMap[TEST_FRAME_TYPE] == TEST_NAME);
-    QVERIFY(backMap[recording::Frame::TYPE_HEADER] == HEADER_NAME);
+    auto typeHeader = recording::Frame::TYPE_HEADER;
+    QVERIFY(backMap[typeHeader] == HEADER_NAME);
 }
 
 void testFilePersist() {
@@ -95,6 +94,7 @@ void testClipOrdering() {
     for (auto writeFrame = writeClip->nextFrame(); writeFrame; writeFrame = writeClip->nextFrame()) {
         QVERIFY(writeClip->position() >= lastFrameTimeOffset);
     }
+    Q_UNUSED(lastFrameTimeOffset); // FIXME - Unix build not yet upgraded to Qt 5.5.1 we can remove this once it is
 }
 
 #ifdef Q_OS_WIN32