I've just followed this tutorial when I tried to build the updated sample solution by entering the following:
cd ~/azure-iot-sdks/
sudo ~/azure-iot-sdks/c/build_all/linux/setup.sh
chmod +x ~/azure-iot-sdks/c/build_all/linux/build.sh
~/azure-iot-sdks/c/build_all/linux/build.sh
I got the error shown in the following screenshots :
https://i.stack.imgur.com/I6iUN.png
I can't find anything to fix this. Any ideas what's going on?