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Re: [Axiom-developer] Re: [Axiom-commit] SVN: axiom: [508] branch

From: Waldek Hebisch
Subject: Re: [Axiom-developer] Re: [Axiom-commit] SVN: axiom: [508] branches/wh-sandbox
Date: Mon, 30 Apr 2007 01:51:04 +0200 (CEST)

Gabriel Dos Reis wrote:
> AX_FLAGS presents far less technical problems than ENV does; in fact,
> I would be very much interested in the problems you see with AX_FLAGS
> that is not present with ENV.  
> I asked for technical reasons, the serious reason I have been offered
> is that "you dislike it more than ENV".  THAT reads "gratuituous"
> difference in my book.

First, I see no problem with name: since we can not use ENV changing
it to AX_FLAGS is OK.  My basic objection is that AX_FLAGS is redundant.
We already have mechanizm to propagate values to subdirectories:
we use  So AX_FLAGS establishes parallel chanel,
which has significant potential for bugs and confusion.

The problem I see in writing


(as opposed to)


is that we override thing in Makefile. But we are effectively
"broadcasting" AX_FLAGS down which looks like abuse of mechanizm
designed for something else (that is allowing default in
Makfile but sometimes taking alternate values).

The second extra problem is that AX_FLAGS is new code, so may
trick potential readers to think that its use is right thing
to do.

                              Waldek Hebisch

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