Re: [PATCH] libfortran/90038: Use posix_spawn instead of fork

[Thomas Koenig]

Hi Janne,

fork() semantics can be problematic.  Most unix style OS'es have
posix_spawn which can be used to replace fork + exec in many cases.
For more information see
e.g. 
https://www.microsoft.com/en-us/research/uploads/prod/2019/04/fork-hotos19.pdf

This replaces the one use of fork in libgfortran with posix_spawn.

Do I understand the patch correctly that we would no longer use fork()
if posix_spawn is not available?  I think we should leave that in as
a fallback option.

Regards

        Thomas