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bug#9372: 24.0.50; missing header biditype.h

From: Stefan Monnier
Subject: bug#9372: 24.0.50; missing header biditype.h
Date: Fri, 26 Aug 2011 00:11:43 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

> timestamp newer than deps/bidi.d, the latter would be regenerated before
> anything else happened. But maybe it doesn't work like that?

No, it's the opposite: the bidi.d file from previous compilation
(i.e. older) is used to guess whether bidi.c needs to be recompiled.

Basically, the problem is that the bidi.d file should contain
dependencies which say "if foo.c is newer than bidi.c, then recompile,
but if foo.c doesn't exist any more, then just ignore this rule rather
than foolishly trying to build foo.c".
I don't know if GNU make provides such a kind of dependency (tho you
can get it via ifeq trickery).


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