3dbdfbc06f
Silently recover if REDO_CHEATFDS file descriptors are closed, because they aren't completely essential and MAKEFLAGS-related warnings already get printed if all file descriptors have been closed. If MAKEFLAGS --jobserver-auth flags are closed, improve the error message so that a) it's a normal error instead of an exception and b) we link to documentation about why it happens. Also write some more detailed documentation about what's going on here.
16 lines
761 B
Text
16 lines
761 B
Text
# Make sure we can survive if a process closes all file descriptors,
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# including any jobserver file descriptors, as long as they also
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# unset MAKEFLAGS.
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redo-ifchange ../../redo/py
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# If we leave MAKEFLAGS set, then it's fair game to complain that the
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# advertised file descriptors are gone, because GNU make also complains.
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# (Although they only warn while we abort. They can't abort so that
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# they don't break backward compat, but we have no such constraint, because
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# redo has always failed for that case.)
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#
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# On the other hand, we shouldn't have to unset REDO_CHEATFDS, both for
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# backward compatibility, and because REDO_CHEATFDS is undocumented.
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# redo should recover silently from that problem.
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unset MAKEFLAGS
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../../redo/py ./closefds.py redo noflags
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