Fix bare-metal build

 - Improve DPDK build process, by using the --prefix flag
 - Do not install libgflags, since we use a submodule for that

README.md

@@ -56,7 +56,7 @@ Pulling from GHCR requires an auth token:
 ```bash
 # Install packages required to try out Machnet
 sudo apt-get update
-sudo apt-get install -y docker.io net-tools driverctl libgflags-dev uuid-dev
+sudo apt-get install -y docker.io net-tools driverctl uuid-dev
 
 # Reboot like below to allow non-root users to run Docker
 sudo usermod -aG docker $USER && sudo reboot

azure-pipelines.yml

@@ -16,7 +16,7 @@ steps:
     echo 'APT::Install-Suggests "0";' | sudo tee -a /etc/apt/apt.conf.d/00-docker
     echo 'APT::Install-Recommends "0";' | sudo tee -a /etc/apt/apt.conf.d/00-docker
     sudo apt-get update
-    sudo apt-get install --no-install-recommends -y git build-essential cmake meson pkg-config libudev-dev libnl-3-dev libnl-route-3-dev python3-dev python3-docutils python3-pyelftools libnuma-dev ca-certificates autoconf libgflags-dev libgflags2.2 libhugetlbfs-dev pciutils libunwind-dev uuid-dev nlohmann-json3-dev
+    sudo apt-get install --no-install-recommends -y git build-essential cmake meson pkg-config libudev-dev libnl-3-dev libnl-route-3-dev python3-dev python3-docutils python3-pyelftools libnuma-dev ca-certificates autoconf libhugetlbfs-dev pciutils libunwind-dev uuid-dev nlohmann-json3-dev
     sudo apt-get --purge -y remove rdma-core librdmacm1 ibverbs-providers libibverbs-dev libibverbs1
     sudo rm -rf /var/lib/apt/lists/*
   displayName: 'Set timezone and Install dependencies'

docs/INTERNAL.md

@@ -10,7 +10,7 @@ Dockerfile.
 
 ```bash
 # On latest Ubuntu:
-sudo apt -y install cmake libgflags-dev pkg-config nlohmann-json3-dev ninja-build gcc-10 g++-10 doxygen graphviz python3-pip meson libhugetlbfs-dev libnl-3-dev libnl-route-3-dev
+sudo apt -y install cmake pkg-config nlohmann-json3-dev ninja-build gcc-10 g++-10 doxygen graphviz python3-pip meson libhugetlbfs-dev libnl-3-dev libnl-route-3-dev
 pip3 install pyelftools
 ```
 
@@ -41,11 +41,14 @@ ldconfig
 
 ### Build DPDK
 
-We use DPDK v21.11 LTS, like so:
+Download and extract DPDK 23.11, then:
 
 ```bash
-export RTE_SDK=/path/to/dpdk-21.11/
-cd ${RTE_SDK} && meson build && cd build && ninja && DESTDIR=${PWD}/install ninja install
+cd dpdk-23.11
+meson build --prefix=${PWD}/build/install/usr/local
+ninja -C build
+ninja -C build install
+export PKG_CONFIG_PATH="${PWD}/build/install/usr/local/lib/pkgconfig"
 ```
 
 ### Build Machnet