Re: MPC version 0.8 released!

["Kaveh R. Ghazi" <ghazi at caip dot rutgers dot edu>]

From: "Paolo Carlini" <paolo.carlini@oracle.com>

> Ian Lance Taylor wrote:
> > My guess is that /usr/local/lib is in /etc/ld.so.conf, and that
> > ldconfig gets run by a cron job periodically, and that it wasn't run
> > between the time Paolo built mpc and the time he tried to use it.
> Right Ian, that was it: I ran ldconfig by hand and now it works. Gosh,
> may years ago I knew everything about ldconfig, these polished distros
> are making my mind lazy ;)
>
> Paolo.

I'm glad it sounds like you got it all figured out.

FWIW, this general issue with shared libraries is noted in PR 21547 and 
applies to all library dependencies including GMP/MPFR.  It's just that most 
people have these from their distro in /usr/lib so there's no problem 
finding them.  The issue may temporarily resurface with MPC until you can 
get it automatically.

If I'm building these libraries myself, I get around this by always 
configuring GMP/MPFR/MPC with --disable-shared.  But I seem to recall that 
shared libraries are mandatory for one of the other dependencies. (?)  I 
forget which one...

I think a more general solution would be to use libtool to link cc1 et al. 
so that the magic incantation to embed the rpath is done in a portable 
fashion.

I don't know what's involved.  Any takers?

       Thanks,
       --Kaveh