macOS 10.13 reports "please check gdb is codesigned - see taskgated(8)"

[Tom Tromey]

>>>>> ">" == chunming xu <chunming_xu@qq.com> writes:

>> hi,I install gdb8.0 on macOS10.13.5.But when I use gdb to debug cpp,
>> gdb reports the error like this :
>> Unable to find Mach task port for process-id 3965: (os/kern) failure (0x5).

Please try gdb from git.  There have been a number of fixes for macOS
High Sierra since 8.0.  Some of the more important fixes went in after
gdb 8.2 was released.

Tom