[bug #40725] Make could completely freeze during a parallel build in some particular conditions

[Paul D. Smith]

Follow-up Comment #1, bug #40725 (project make):

I'm not sure what the rcmd*() stuff is here... is this part of the LD_PRELOAD
provided by fakeroot?

In any event the POSIX standard clearly states that close(2) is entirely valid
and completely safe to be called from a signal handler.  For the list of
async-signal-safe functions see the signal(7) man page on your system.

Although I've not looked in depth at this it seems to me that if fakeroot is
replacing the close() system call with a version (via LD_PRELOAD) which is not
async-signal-safe, then that's a problem with fakeroot.

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