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Re: [PCH] driver, documentation


On Monday, August 19, 2002, at 02:17  PM, Geoff Keating wrote:

X-Sieve: cmu-sieve 2.0
Date: Mon, 19 Aug 2002 13:19:50 -0700
Cc: gcc-patches@gcc.gnu.org
From: Devang Patel <dpatel@apple.com>


On Saturday, August 17, 2002, at 08:32  PM, Geoffrey Keating wrote:

+@item
+Any macros defined before the precompiled header (including with
+@option{-D}) must either be defined in the same way as when the
+precompiled header was generated, or must not affect the precompiled
+header, which usually means that the they don't appear in the
+precompiled header at all.
May be it is implicitly said, but how about #undef's ?

Do we want to allow #undef before #include, for macros which are
defined and/or used in precompiled header ?
It's implicit.  I guess I could say "Any macros defined (or not
defined)" if that'll make things clearer, any opinions?
Fine with me.

-Devang


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