Re: configure: error: cannot compute sizeof (long double), 77

[Martin Bligh <mbligh at google dot com>]

Dan Kegel wrote:
> On 1/25/06, Mike Frysinger <vapier@gentoo.org> wrote:
>
> > On Wednesday 25 January 2006 18:34, Martin Bligh wrote:
> >
> > > configure: error: cannot compute sizeof (long double), 77
> >
> > read the config.log file ... it'll point you in the direction of the real
> > issue
>
>
> Martin and I chatted offlist.  Turns out he's trying to build an x86_64 on
> an x86_64 system that is running a 32 bit OS.  config.guess
> reports x86_64-unknown-linux-gnu.  Perhaps that made configure
> think this wasn't a cross-build.  Replacing crosstool's config.guess with
>   echo i686-pc-linux-gnu
> is probably a valid workaround.   I'm trying it now on Martin's machine
> (how nice to be trusted :-)

I took a *very* brief look at config.guess. Isn't it fundamentally 
flawed for what you want in that it's trying to work out the 
architecture of the running kernel, and what you want to know is the 
architecture of userspace?

I suppose that's kind of hard in a mixed userspace environment between 
32 and 64 bit ;-( Would something like "file /usr/bin/gcc" give you a
closer approximation to what you're looking for?

M.

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