btowc(0) configure check hangs clang? [was: Possible configure bug]

[Eric Blake]

On 09/02/2011 03:53 PM, Aleksander Balicki wrote:
> I was ask to forward the message here. Because there nothing more to it,
> I'll just paste the bugzilla link:
> https://bugzilla.redhat.com/process_bug.cgi

Bogus link.  You meant to give a lot more details, so I'll help you out:

https://bugzilla.redhat.com/show_bug.cgi?id=735515

But for those who aren't in the mood to click through:

> Description of problem:
> libvirt doesn't compile under clang
> it doesn't even finish configure
> it hangs forever on the btowc(0) check
> on gcc it goes thru
>
> after conversation on #llvm got info, that's probably the fault of configure
> abusing inline.
>
>
> Version-Release number of selected component (if applicable): 0.9.{3,4}
>
>
> How reproducible: always
>
> Steps to Reproduce:
> 1.compile on gentoo USE=virt-network CC=clang CXX=clang++ emerge -1 libvirt
>
> Actual results:
> hangs on the line: checking btowc(0)
>
> Expected results:
> go thru with configure and compilation
>
> Additional info:
>
> [reply] [-]
> Comment 1 Eric Blake 2011-09-02 15:30:37 MDT
>
> This sounds like a gnulib problem that will impact multiple source packages.
> Can you please send email to address@hidden describing the issues, and give
> the details from the conversation on #llvm why you think it is a configure bug?
>
> [reply] [-]
> Comment 2 Aleksander Balicki 2011-09-02 15:50:32 MDT
>
> 19:10:35 alistra_> i have another gcc/clang mismatch, libvirt-0.9.{3,4} hangs
> on configure on the line checking whether btowc(0) is correct...
> 19:10:56 alistra_> clang hangs and gcc goes thru
> 19:11:33 echristo> yeah, it's a wonky configure program that abuses inline
>
> sorry for the compactness, but it's the only info i got

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