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

[Chris Wilson]

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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