variable 'secnum' set but not used [-Wunused-but-set-variable]

variable 'frontend_verilog_yynerrs' set but not used [-Wunused-but-set-variable]

Failed to add apt key via server keyserver.ubuntu.com: Error: Command failed with exit code 2: sudo 'gpg' '--no-default-keyring' '--keyring' 'gnupg-ring:/etc/apt/trusted.gpg.d/setup-cpp-ubuntu-archive.gpg' '--keyserver' 'keyserver.ubuntu.com' '--recv-keys' '40976EAF437D05B5'

Failed to add apt key via server keyserver.ubuntu.com: Error: Command failed with exit code 2: sudo 'gpg' '--no-default-keyring' '--keyring' 'gnupg-ring:/etc/apt/trusted.gpg.d/launchpad-toolchain.gpg' '--keyserver' 'keyserver.ubuntu.com' '--recv-keys' '1E9377A2BA9EF27F'

variable 'secnum' set but not used [-Wunused-but-set-variable]