What are the dependencies needed for Ubuntu base image?

It seems that the dependencies listed in README aren't enough if the base image is Ubuntu. Besides python, it seems to need libtool, autoconf etc. 

```
FROM ubuntu:20.04 as build-image

# Install aws-lambda-cpp build dependencies
RUN apt-get update && \
  apt-get install -y \
  g++ \
  make \
  cmake \
  unzip \
  libcurl4-openssl-dev
 ```