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Re: [PCH] driver, documentation
- From: Devang Patel <dpatel at apple dot com>
- To: Geoffrey Keating <geoffk at redhat dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Mon, 19 Aug 2002 13:19:50 -0700
- Subject: Re: [PCH] driver, documentation
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 ?
-Devang