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Re: Using and detecting environment variables as flags

From: Bruce Korb
Subject: Re: Using and detecting environment variables as flags
Date: Tue, 25 May 2004 12:30:36 -0700

John Ling wrote:
> Hello, I want to be able to read/check the value of an environment
> variable in my  This would be a variable that I set as part
> of the an [action-if-found] in the AC_SEARCH_LIBS method, that I set in
> How do I reference such a variable?
> In addition, depending on the value of this variable, I then want to
> pass a signal from my to yet another Makefile which is
> called from  This signal is to tell the second Makefile to
> add an -lz in its LIBS definition.
> How do I do this?  In what way can I send such a flag/signal?

What is the real problem you are trying to solve?  Normally, autoconf
results get stored into substitution strings that wind up as
Makefile macros and set appropriately in the derived Makefile.

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