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Re: #if vs. #ifdef -- again (was: AC_CHECK_SIZEOF failing on undefined H

From: Andreas Schwab
Subject: Re: #if vs. #ifdef -- again (was: AC_CHECK_SIZEOF failing on undefined HAVE_STDINT_H with -Werror)
Date: Tue, 15 Aug 2006 17:38:03 +0200
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.50 (gnu/linux)

nash <address@hidden> writes:

> Really? C99 seems to do so (section 6.10.1). Perhaps I'm reading more
> into it than is actually there, though.

6.10.1#3 ... If the token defined is generated as a result of this
replacement process or use of the defined unary operator does not match
one of the two specified forms prior to macro replacement, the behavior
is undefined.


Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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