[Bug go/86331] the gccgo's "go" tool looks like failing to invoke any sub go command

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86331

--- Comment #9 from Andreas Schwab <schwab@linux-m68k.org> ---
In general, the value of errno is undefined unless you know the previous system
call failed.  In this case the SIGCHLD signal handler has modified errno.  This
has nothing to do with VM or arm64 or whatever.