Hello,
I am getting this strage error (no identity found) when codesigning from the Terminal I am using this command:
sudo codesign -f -s "Mac Developer: xxxxxxxxx@gmail.com (VVVXXXXX)" -v /usr/local/gcc-8.2/bin/gdb-8.2
But the strange thig is, if I use another certificate it works, or if I move the app to the Desktop and only to the Desktop...