[CMake] CMake GUI "Stop" button does not halt exec_process

[Person Withhats]

I don't follow. None of this looks like I can press stop in CMake and have
the process die. I'm not making any additional children, just
execute_process in CMak (so 1 child that never gets killed).

On Fri, Jan 11, 2019 at 7:58 AM Hendrik Sattler <post at hendrik-sattler.de>
wrote:

> Hi,
>
> killing everything might be problematic in some cases: MSVC uses some
> shared processes to write PDB files. Killing that will make an unrelated
> other build fail. That was real fun to find out when Jenkins was cleaning
> up. So kill your children but don't be too pedantic.
>
> HS
>
>
> Am 11. Januar 2019 10:43:05 MEZ schrieb Chris Wilson <
> chris+cmake at qwirx.com>:
>>
>> In case it helps, Box Backup uses Windows Job Objects
>> <https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-createjobobjecta> to
>> ensure that any daemons started during a test will automatically be killed
>> when the test process exits (if not stopped cleanly beforehand):
>>
>>
>> https://github.com/boxbackup/boxbackup/blob/s3_support/infrastructure/buildenv-testmain-template.cpp#L367
>>
>> On Linux you can use prctl(PR_SET_PDEATHSIG, SIGKILL) in the child
>> process (between fork() and exec()) to achieve this.
>>
>> On Thu, 10 Jan 2019 at 22:17, Person Withhats <personwithhats2 at gmail.com>
>> wrote:
>>
>>> Pressing "STOP" in the CMake GUI interface halts CMake itself but does
>>> not stop any execute_process that is going on at the time. This makes it
>>> hang until the process finishes, since no interrupt is sent......
>>>
>>> Aggravating when you're using an exterior script (e.g. a .exe or .py)
>>> that e.g. handles package maintenance. Would hang up for the entire
>>> duration of ~40 minutes unless you force kill that sub process.
>>>
>>> I think force-killing CMake GUI also won't forward the kill to the
>>> exec_process, orphaning it.....>.<
>>>
>>> Let me know any suggestions or possible fixes
>>> --
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