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Date: Wed, 04 Feb 2015 22:21:06 -0500
From: Ken Brown <kbrown AT cornell DOT edu>
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To: cygwin AT cygwin DOT com
Subject: Re: gcc warning about MPFR header version
References: <54D23A4B DOT 4060807 AT cornell DOT edu> <87mw4t8yoh DOT fsf AT Rainer DOT invalid>	<54D27F84 DOT 2030709 AT cornell DOT edu> <87egq58kqk DOT fsf AT Rainer DOT invalid>
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On 2/4/2015 3:50 PM, Achim Gratz wrote:
> Ken Brown writes:
>> On 2/4/2015 10:49 AM, Achim Gratz wrote:
>>> Ken Brown writes:
>>>> While trying to build clisp on x86_64 Cygwin with 'gcc -v', I got the following:
>>>>
>>>>     warning: MPFR header version 3.1.2 differs from library version 3.1.2-p11.
>>>>
>>>> Does this indicate a problem, or can it be safely ignored?
>>>
>>> You need to install the latest version of libmpfr-devel (should be 3.1.2-2).
>>
>> That's what I have.
>
> You should have this:
>
> --8<---------------cut here---------------start------------->8---
> $ grep MPFR_VERSION /usr/include/mpfr.h
> #define MPFR_VERSION_MAJOR 3
> #define MPFR_VERSION_MINOR 1
> #define MPFR_VERSION_PATCHLEVEL 2
> #define MPFR_VERSION_STRING "3.1.2-p11"
> #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
> #define MPFR_VERSION \
> MPFR_VERSION_NUM(MPFR_VERSION_MAJOR,MPFR_VERSION_MINOR,MPFR_VERSION_PATCHLEVEL)
> --8<---------------cut here---------------end--------------->8---

I do have this, and I have no other version of the header.  But this

 > #define MPFR_VERSION \
 > MPFR_VERSION_NUM(MPFR_VERSION_MAJOR,MPFR_VERSION_MINOR,MPFR_VERSION_PATCHLEVEL)

yields a value of MPFR_VERSION that doesn't include the "-p11".  Maybe that's 
what confused gcc.  Anyway, it sounds like it's not a problem.

Ken

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