RE: [gentoo-embedded] GCC 4.3 fails on mpfr

[Dilip Malinur Ramesh]

Hi,
I am able to successfully build cross compiler toolchain using gcc-4.3
after installing mpfr-2.3.1 libraries on host system.
Thank you for all your help and support.

Regards,
Dilip 

-----Original Message-----
From: Mike Frysinger [mailto:vapier@g.o] 
Sent: Wednesday, May 07, 2008 9:56 AM
To: gentoo-embedded@l.g.o
Cc: Ned Ludd; Christopher Friedt
Subject: Re: [gentoo-embedded] GCC 4.3 fails on mpfr

On Tuesday 06 May 2008, Ned Ludd wrote:
> On Tue, 2008-05-06 at 17:24 -0400, Mike Frysinger wrote:
> > On Tuesday 06 May 2008, Christopher Friedt wrote:
> > > This is a 'chicken / egg' problem. In order to build a cross
compiler
> > > for arch X you need mpfr compiled for arch X. In order to build
mpfr
> > > for arch X you need a toolchain for arch X.
> > >
> > > Try building the cross-compiler without mpfr first, then build
libmpfr,
> > > and then rebuild the cross compiler.
> >
> > you cant build gcc-4.3 without gmp and mpfr.  they're hard
requirements. 
> > but they're requirements that the host system has it, not that they
are
> > cross-compiled for the target.
>
> this might pose a problem at Gentoo as I don't think mpfr can even be
> cross compiled in the first place. I might be wrong but I seem to
recall
> fighting with it in the last week using ( arm-softfloat-linux-uclibc
||
> arm*-softloat-linux-gnueabi).

i said they are host libraries, not target libraries.  gcc itself uses
them in 
order to even execute in the first place starting with gcc-4.3.

what Christopher is probably referring to is gfortran support ... it
requires 
mpfr/gmp to be cross-compiled.

but to address your question, they both do cross-compile fine.  i just
did it 
two days ago for mingw32 target so that i could build up a gfortran 
cross-compiler.
-mike
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