Disable wrilten buf in docker

[zoujiaqing]

On Tuesday, 12 March 2024 at 15:44:08 UTC, Steven Schveighoffer 
wrote:
> On Tuesday, 12 March 2024 at 06:36:09 UTC, zoujiaqing wrote:
>> Hi, my application use writeln in docker don't display.
>>
>>
>> Python add -u disable it.
>> https://stackoverflow.com/questions/29663459/why-doesnt-python-app-print-anything-when-run-in-a-detached-docker-container
>
>
> Use setvbuf to switch to line buffering. Then you don’t have to 
> manually flush everything
>
> https://en.cppreference.com/w/c/io/setvbuf
>
> -Steve

Thank you Steve!

how to use it in global?