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Re: Header guards for config.h

From: Guido Draheim
Subject: Re: Header guards for config.h
Date: Sat, 11 Jan 2003 20:12:50 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; de-AT; rv:1.1) Gecko/20020826

Peter Eisentraut schrieb:
Would it make sense to have autoheader create header guards against double
inclusion into its output file?

No. Do not include config.h from a header file, unless it is again the
only single wrapper around it to be included by the rest of your
software - and don't install it. There should no multiple include-config.h
around. Writing a wrapper might also solve your current problem as well ;-)

The reason: there have been problems with third-area compilations
to have their own config.h being somewhat differently, and people
do not notice it. To guard on it, use again AX_PREFIX_CONFIG_H and
shift dependencies on those prefixed symbols - that prefix-config.h
is guarded and in my opinion that makes sense.

-- cheers, guido                            hptt://

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