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Re: [cgal-discuss] Installation guide bug report


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  • From: Fernando Cacciola <>
  • To:
  • Subject: Re: [cgal-discuss] Installation guide bug report
  • Date: Mon, 11 May 2009 09:48:58 -0300

Hi Sylvain,

Fernando Cacciola wrote:
Hi Tom Dreyfus,

Installation Manual, chapter 2.4 Exact Arithmetic:
"Having GMP version 4.1.4 or higher and MPFR version 2.2.1 or higher installed is *highly recommended*."

But I cannot install CGAL 3.4 without MPFR.

Indeed.

That is a documentation bug since GMP and MPFR are requirements.
You need to installed them both.

I thought MPFR was only needed when support for GMP was activated.


You are right, and I see that what I write is not the same... so let me try
again:

It is ether GMP+MPFR or none of them, which the documentation doesn't state.


If CMake detects GMP it will *require* MPFR, otherwise insallation will continue without GMP+MPFR support.

If you wish to bypass detection of GMP so that lacking MPFR doesn't prevent installation you should use: WITH_GMP=FALSE

Best

Fernando Cacciola
www.geometryfactory.com




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