Re: [Qemu-devel] [PATCH v2 1/2] Partially revert commit d4e5ec877ca

["Daniel P. Berrangé" <berrange@redhat.com>]

On Fri, Jun 15, 2018 at 08:20:36AM -0500, Matthias Maier wrote:
> 
> On Fri, Jun 15, 2018, at 04:42 CDT, Daniel P. Berrangé <berrange@redhat.com> wrote:
> 
> > On Thu, Jun 14, 2018 at 11:40:41PM -0500, Matthias Maier wrote:
> >> This commit removes the PYTHON_UTF8 workaround. The problem with setting
> >> 
> >>   LC_ALL= LANG=C LC_CTYPE=en_US.UTF-8
> >> 
> >> is that the en_US.UTF-8 locale might not be available. In this case
> >
> > What platform are you using where  UTF8 locale is not available ?
> 
> For example, neither Debian (and for that matter Ubuntu) nor Gentoo
> guarantee that the en_US.UTF-8 locale is available.
> 
> We in particular encounter build problems on Gentoo when users have only
> set very specific, non en_US locales, for example de_DE.UTF-8 (or
> similar).
> 
> > Indeed I would ideally like to make the entire of QEMU build with an
> > explicit en_US.UTF-8 or C.UTF-8 locale, to ensure that we get reliably
> > reproducible builds, as locale differences have been known to impact
> > output of many tools not just python.
> 
> We face the same problem in Gentoo and usually advice users to set
> LC_ALL=C when submitting bug reports. (It is frustrating that glibc
> upstream doesn't get their act together fixing and merging the current
> C.UTF-8 proposal.)
> 
> So what about making the build system more robust (by merging the
> patches, or a variant) and either setting C.UTF-8, or C globally
> (depending on availability)?

Yes, if we could figure out a way to check for existance of locales, we
could make configure check for C.UTF-*, en_US.UTF-8, C  in that order,
using the first it finds to work. Fun fact, on macOS 'C' is always
UTF-8, so its valid to use just 'C'.

Regards,
Daniel
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