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Date: Wed, 21 Nov 2018 14:14:33 -0800 (PST)
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Subject: Re: GNAT Modification_Time limitation
From: Lionel Draghi <lionel.draghi@gmail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:54870
Date: 2018-11-21T14:14:33-08:00
List-Id: <comp.lang.ada>

Le mercredi 21 novembre 2018 20:48:40 UTC+1, Simon Wright a =C3=A9crit=C2=
=A0:
...
> Can't you tell from strace which files were opened for read and which
> for write?

Yes, strace can monitor every call to system API, with parameters.
I taught the time tag way was easier, but it may be time to change my mind =
:-)

> I suppose there are some files that are opened read/write; either,
> perhaps most usually, in separate parts of the build, or by being
> updated in one.

strace -f monitors also sub processes (-f stands for "follow forks")
That's handy.