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Re: Trouble with gnulib/float.h on Intrepid

From: Eric Blake
Subject: Re: Trouble with gnulib/float.h on Intrepid
Date: Tue, 08 Oct 2013 16:30:32 -0600
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On 10/08/2013 04:13 PM, Rhys Ulerich wrote:
> On Intrepid, a BG/P system up at Argonne with some fun old IBM XL
> compilers, a user of mine is seeing gnulib/float.h containing the line
>     #include " "
> which appears to be arising from
>     configure:13477: checking absolute name of <float.h>
>     configure:13516: result: ""
> due to 
> http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=blob_plain;f=m4/float_h.m4
> where
>     host_cpu='powerpc64'
>     host_os='linux-gnu'
>     host_vendor='unknown'
> What information might I collect to help debug this?  This is atop
> gnulib HEAD.  I have a full config.log sitting around and would be
> happy to send it someone's way in addition to the generated configure
> file.

The full config.log would be useful to see if configure left any more
hints about why it couldn't determine an absolute name for <float.h>;
you might also want to try repeating the $CC tests listed in the
config.log but do it by hand, to give us more details about the
compilation environment and what the preprocessor will let us learn
about a system header.

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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