install pkg-config

Author: Caznix

.github/workflows/ci.yml

@@ -77,7 +77,7 @@ jobs:
           sudo apt-get install -y software-properties-common
           sudo add-apt-repository ppa:ubuntu-toolchain-r/test
           sudo apt-get update
-          sudo apt-get install -y gcc gcc-aarch64-linux-gnu cmake libssl-dev
+          sudo apt-get install -y gcc gcc-aarch64-linux-gnu cmake libssl-dev pkg-config
 
       - name: Install Dependencies (macOS)
         if: runner.os == 'macOS'