TensorFlow Lite C++ API example for inference

I finally got it to run. Considering my directory structure looks like this:

/(root)
    /tensorflow
        # whole tf repo
    /demo
        demo.cpp
        linear.tflite
        libtensorflow-lite.a

I changed demo.cpp to

#include <stdio.h>
#include "tensorflow/lite/interpreter.h"
#include "tensorflow/lite/kernels/register.h"
#include "tensorflow/lite/model.h"
#include "tensorflow/lite/tools/gen_op_registration.h"

int main(){

    std::unique_ptr<tflite::FlatBufferModel> model = tflite::FlatBufferModel::BuildFromFile("linear.tflite");

    if(!model){
        printf("Failed to mmap model\n");
        exit(0);
    }

    tflite::ops::builtin::BuiltinOpResolver resolver;
    std::unique_ptr<tflite::Interpreter> interpreter;
    tflite::InterpreterBuilder(*model.get(), resolver)(&interpreter);

    // Resize input tensors, if desired.
    interpreter->AllocateTensors();

    float* input = interpreter->typed_input_tensor<float>(0);
    // Dummy input for testing
    *input = 2.0;

    interpreter->Invoke();

    float* output = interpreter->typed_output_tensor<float>(0);

    printf("Result is: %f\n", *output);

    return 0;
}

Also, I had to adapt my compile command (I had to install flatbuffers manually to make it work). What worked for me was:

g++ demo.cpp -I/tensorflow -L/demo -ltensorflow-lite -lrt -ldl -pthread -lflatbuffers -o demo

Thanks to @AlexCohn for getting me on the right track!

Here is the minimal set of includes:

#include "tensorflow/lite/interpreter.h"
#include "tensorflow/lite/kernels/register.h"
#include "tensorflow/lite/model.h"
#include "tensorflow/lite/tools/gen_op_registration.h"

These will include other headers, e.g. <memory> which defines std::unique_ptr.