From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?B?5a6L5paH5q2m?= <iyzsong@gmail.com>
Subject: Re: IBus and different GTK versions
Date: Mon, 14 Sep 2015 17:18:31 +0800
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To: Ricardo Wurmus <rekado@elephly.net>
Cc: guix-devel <guix-devel@gnu.org>

2015-09-14 16:28 GMT+08:00, Ricardo Wurmus <rekado@elephly.net>:
>
> =E5=AE=8B=E6=96=87=E6=AD=A6 <iyzsong@gmail.com> writes:
>
>> Ricardo Wurmus <rekado@elephly.net> writes:
>>
>>> [...]
>>>
>>> It seems that GTK3 only looks for
>>> =E2=80=98$libdir/gtk-3.0/3.0.0/immodules.cache=E2=80=99 and GTK2 only l=
ooks for
>>> =E2=80=98$libdir/gtk-2.0/2.10.0/immodules.cache=E2=80=99 by default, wh=
ere =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 fil=
es that are *not*
>>> located in their =E2=80=98$libdir=E2=80=99.  In that case we could gene=
rate a fresh
>>> =E2=80=98immodules.cache=E2=80=99 file for each major GTK version when =
building a
>>> profile.  Unfortunately, I haven=E2=80=99t been able to find any docume=
nted
>>> means to achieve this.  It might require patching the GTKs to check an
>>> additional path or environment variable.
>>>
>> We can set 'GTK_EXE_PREFIX' to the '~/.guix-profile', and generate the
>> 'immodules.cache' files in a profile hook.  It will work for both gtk2
>> and gtk3 applications.
>
> Does this mean that GTK needs to be installed in the user=E2=80=99s profi=
le for
> this to work?  I thought =E2=80=98GTK_EXE_PREFIX=E2=80=99 would change th=
e path of
> =E2=80=98$libdir=E2=80=99 for *all* of GTK=E2=80=99s libraries.  It can o=
nly have one value, not
> a list of paths to look for libraries.
Yes, this require install GTK+ into user's profile.
Also, there is a 'GTK_DATA_PREFIX' in a same situation, which I think is
the only way to set the GTK+ 2 theme.