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Re: how to detect int64?

From: Eric Blake
Subject: Re: how to detect int64?
Date: Mon, 19 Jul 2010 09:31:08 -0600
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On 07/18/2010 08:01 PM, Jay K wrote:
> scary configure output noticed:
> checking for int64_t... int
> checking for uint64_t... unsigned int
> config.h:
> /* Define to the type of a signed integer type of width exactly 64 bits if
>    such a type exists and the standard includes do not define it. */
> #define int64_t int
> Looks like a known/fixed regression in autoconf 2.64.

Thanks for the report.

Which version of autoconf generated the configure that produced the
output you are questioning?  And am I correct that this was on:

> Target: alpha-dec-osf4.0g

Did the configure.ac use the documented AC_TYPE_INT64_T and
AC_TYPE_UINT64_T macros, or is it using a home-brewed approach?

While you provided lots of details, you didn't provide quite enough for
me to know if this is something worth worrying about for the upcoming
2.67 release due later today.

Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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