Re: [Qemu-devel] QEMU produces invalid JSON due to locale-dependent code

[Alberto Garcia]

On Mon 24 Aug 2015 12:05:02 PM CEST, Markus Armbruster wrote:

>> This seems to happen because of GTK+ calling setlocale(). The easiest
>> solution is probably to call setlocale(LC_NUMERIC, "C") before
>> snprintf() (or at start-up ui/gtk.c), but opinions are welcome.
>
> A library calling setlocale() is a big no-no in my book.
>
> Overriding LC_NUMERIC as you propose should fix this particular bug.
>However, exposing unprepared code to locale is not a good idea for
>other categories as well.  LC_COLLATE and LC_CTYPE are even sneakier
>sources of bugs in my experience.  I'd really, really prefer to stay in
>the "C" locale *completely*.

You can prevent GTK+ from calling setlocale() by using
gtk_disable_setlocale() before gtk_init(), but note that setlocale() is
needed for gettext.

Berto