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Subject: Re: IBus and different GTK versions
Date: Sun, 13 Sep 2015 19:51:23 +0800
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To: Ricardo Wurmus <rekado@elephly.net>, guix-devel <guix-devel@gnu.org>

Ricardo Wurmus <rekado@elephly.net> writes:

> [...]
>
> It seems that GTK3 only looks for
> =E2=80=98$libdir/gtk-3.0/3.0.0/immodules.cache=E2=80=99 and GTK2 only loo=
ks for
> =E2=80=98$libdir/gtk-2.0/2.10.0/immodules.cache=E2=80=99 by default, wher=
e =E2=80=98$libdir=E2=80=99 is
> =E2=80=98$out/lib=E2=80=99 of the GTK package.  (According to
> https://developer.gnome.org/gtk3/stable/gtk-running.html)
>
> To make IBus work we need to find a way to make the different major
> versions of GTK respect different =E2=80=98immodules.cache=E2=80=99 files=
 that are *not*
> located in their =E2=80=98$libdir=E2=80=99.  In that case we could genera=
te a fresh
> =E2=80=98immodules.cache=E2=80=99 file for each major GTK version when bu=
ilding a
> profile.  Unfortunately, I haven=E2=80=99t been able to find any document=
ed
> means to achieve this.  It might require patching the GTKs to check an
> additional path or environment variable.
>
We can set 'GTK_EXE_PREFIX' to the '~/.guix-profile', and generate the
'immodules.cache' files in a profile hook.  It will work for both gtk2
and gtk3 applications.