diff --git a/camera/basic/src/main/cpp/camera_listeners.cpp b/camera/basic/src/main/cpp/camera_listeners.cpp
index 4a3ef4a44..42e42842e 100644
--- a/camera/basic/src/main/cpp/camera_listeners.cpp
+++ b/camera/basic/src/main/cpp/camera_listeners.cpp
@@ -157,7 +157,8 @@ void NDKCamera::OnSessionState(ACameraCaptureSession* ses,
     return;
   }
 
-  ASSERT(state < CaptureSessionState::MAX_STATE, "Wrong state %d", state);
+  ASSERT(state < CaptureSessionState::MAX_STATE, "Wrong state %d",
+         static_cast<int>(state));
 
   captureSessionState_ = state;
 }
diff --git a/camera/basic/src/main/cpp/camera_manager.cpp b/camera/basic/src/main/cpp/camera_manager.cpp
index 47f2262bd..c7423da6b 100644
--- a/camera/basic/src/main/cpp/camera_manager.cpp
+++ b/camera/basic/src/main/cpp/camera_manager.cpp
@@ -394,7 +394,7 @@ void NDKCamera::StartPreview(bool start) {
     ACameraCaptureSession_stopRepeating(captureSession_);
   } else {
     ASSERT(false, "Conflict states(%s, %d)", (start ? "true" : "false"),
-           captureSessionState_);
+           static_cast<int>(captureSessionState_));
   }
 }
 
diff --git a/camera/texture-view/src/main/cpp/camera_listeners.cpp b/camera/texture-view/src/main/cpp/camera_listeners.cpp
index 4a3ef4a44..42e42842e 100644
--- a/camera/texture-view/src/main/cpp/camera_listeners.cpp
+++ b/camera/texture-view/src/main/cpp/camera_listeners.cpp
@@ -157,7 +157,8 @@ void NDKCamera::OnSessionState(ACameraCaptureSession* ses,
     return;
   }
 
-  ASSERT(state < CaptureSessionState::MAX_STATE, "Wrong state %d", state);
+  ASSERT(state < CaptureSessionState::MAX_STATE, "Wrong state %d",
+         static_cast<int>(state));
 
   captureSessionState_ = state;
 }
diff --git a/prefab/curl-ssl/app/src/main/cpp/java_interop.h b/prefab/curl-ssl/app/src/main/cpp/java_interop.h
index 680291287..153020286 100644
--- a/prefab/curl-ssl/app/src/main/cpp/java_interop.h
+++ b/prefab/curl-ssl/app/src/main/cpp/java_interop.h
@@ -19,6 +19,7 @@
 #include <jni.h>
 
 #include <cstdlib>
+#include <functional>
 #include <string>
 #include <vector>
 
diff --git a/prefab/prefab-dependency/app/src/main/cpp/java_interop.h b/prefab/prefab-dependency/app/src/main/cpp/java_interop.h
index b1dc67ee6..2f5f7b844 100644
--- a/prefab/prefab-dependency/app/src/main/cpp/java_interop.h
+++ b/prefab/prefab-dependency/app/src/main/cpp/java_interop.h
@@ -19,6 +19,7 @@
 #include <jni.h>
 
 #include <cstdlib>
+#include <functional>
 #include <string>
 #include <vector>
 
diff --git a/teapots/more-teapots/src/main/cpp/MoreTeapotsRenderer.cpp b/teapots/more-teapots/src/main/cpp/MoreTeapotsRenderer.cpp
index 3f7b3030e..5809379d0 100644
--- a/teapots/more-teapots/src/main/cpp/MoreTeapotsRenderer.cpp
+++ b/teapots/more-teapots/src/main/cpp/MoreTeapotsRenderer.cpp
@@ -25,6 +25,8 @@
 
 #include <string.h>
 
+#include <vector>
+
 //--------------------------------------------------------------------------------
 // Teapot model data
 //--------------------------------------------------------------------------------
@@ -152,15 +154,17 @@ void MoreTeapotsRenderer::Init(const int32_t numX, const int32_t numY,
       int32_t num_indices;
       glGetActiveUniformBlockiv(shader_param_.program_, blockIndex,
                                 GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &num_indices);
-      GLint i[num_indices];
-      GLint stride[num_indices];
+      std::vector<GLint> indices(num_indices);
+      std::vector<GLint> strides(num_indices);
       glGetActiveUniformBlockiv(shader_param_.program_, blockIndex,
-                                GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, i);
-      glGetActiveUniformsiv(shader_param_.program_, num_indices, (GLuint*)i,
-                            GL_UNIFORM_ARRAY_STRIDE, stride);
-
-      ubo_matrix_stride_ = stride[0] / sizeof(float);
-      ubo_vector_stride_ = stride[2] / sizeof(float);
+                                GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES,
+                                indices.data());
+      glGetActiveUniformsiv(shader_param_.program_, num_indices,
+                            (GLuint*)indices.data(), GL_UNIFORM_ARRAY_STRIDE,
+                            strides.data());
+
+      ubo_matrix_stride_ = strides.at(0) / sizeof(float);
+      ubo_vector_stride_ = strides.at(2) / sizeof(float);
 
       glGenBuffers(1, &ubo_);
       glBindBuffer(GL_UNIFORM_BUFFER, ubo_);