ptrace: Operation not permitted.
Could not attach to the process. Make sure no other debugger traces this process.
Check the settings of
/proc/sys/kernel/yama/ptrace_scope
For more details, see /etc/sysctl.d/10-ptrace.conf
解决办法是在终端输入：sudo gedit /etc/sysctl.d/10-ptrace.conf
把其中的kernel.yama.ptrace_scope = 1 改为 kernel.yama.ptrace_scope = 0
然后重启即可。
- Remember setting the cmake to Debug mode.
