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[Help-gsl] AX_PATH_GSL

From: Jochen Küpper
Subject: [Help-gsl] AX_PATH_GSL
Date: Fri, 4 Jan 2008 15:43:32 +0100

So with the recent patch to the ODE solvers (thank you Frank), I thought I implement a check for it in my projects... I locally bumped the version of the cvs sources to 1.10.1 and use the following test:

AX_PATH_GSL([1.10.1], AC_DEFINE(HAVE_GSL_1_10_1, 1, [ODE fix included]),
AC_MSG_WARN([Your GSL does not include the latest ODE fixes.])

However, we do not require that version. If it is not availale, we will use our old workaround. Therefore, it is annoying to get this long message when running configure on a system that does nt have the new GSL:

checking for GSL - version >= 1.10.1...
*** 'gsl-config --version' returned 1.10.0, but the minimum version
*** of GSL required is 1.10.1. If gsl-config is correct, then it is
*** best to upgrade to the required version.
*** If gsl-config was wrong, set the environment variable GSL_CONFIG
*** to point to the correct copy of gsl-config, and remove the file
*** config.cache before re-running configure
configure: WARNING: Your GSL does not include the latest ODE fixes.

Can that message of the macro easily be switched off?
(Please excuse me if I am overlooking something, but I did not find this possibility in the definition of the macro in gsl.m4.)

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