GMP and MPFR

DJ Lucas dj at linuxfromscratch.org
Mon Oct 6 16:38:54 PDT 2008


Jeremy Huntwork wrote:
> DJ Lucas wrote:
>   
>> I do not have all the details in front of me, but somebody said that gcc 
>> failed if gmp was not on the host in pass1.  Greg pointed us to a DIY 
>> thread that showed how to build with GCC.  There was no _need_ to build 
>> inline beyond that point, because that fixed the problem of the extra 
>> host system requirement.  The extra packages are minimal, and required 
>> one way or the other.  Shared seems better IMO as I use GMP anyway.  It 
>> might not be a bad idea (less maintenance) to build the same way for 
>> both early builds and only build gmp and mpfr standalone for the final, 
>> though I haven't tried that yet.
>>     
>
> I was going to ask 
> what you thought about making both passes in chapter 5 the same, but 
> you've touched on that as well. I don't suppose it makes a big 
> difference there. The only advantages I can see for building inline for 
> both passes are perhaps a slightly smaller set of temporary tools, a 
> marginal amount of time saved by the user (especially if building by 
> hand) and, again, slightly less chance of error.
>   
You forgot the editor's responsibility.  If something changes in GMP at 
a later date, it would only have to be changed in one place instead of 
two.  It's worth investing the time to make and test that change IMO.  
I'll try it in my Wednesday build.

-- DJ Lucas


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