Subject: [bug#67623] [PATCH 0/3 gnome-team]: Require zlib in gdk-3.0.pc.

From: Maxim Cournoyer <[email-masked]>
Date: Wed, 03 Jan 2024 14:50:26 -0500

Hello,

Liliana Marie Prikler <[email-masked]> writes:

> Am Montag, dem 04.12.2023 um 14:39 +0100 schrieb Jean-Pierre De Jesus
> DIAZ:
>> * gnu/packages/gtk.scm (gtk+) <inputs>: Add zlib.
>> 
>> * gnu/packages/gtk.scm (gtk+) <arguments>: Add 'add-zlib-to-gdk-
>> 3.0.pc
>>   phase.
>> 
>> Change-Id: I5efadebded159e0bd495ec07020b431413bd6e10
>> ---
>>  gnu/packages/gtk.scm | 13 ++++++++++++-
>>  1 file changed, 12 insertions(+), 1 deletion(-)
>> 
>> diff --git a/gnu/packages/gtk.scm b/gnu/packages/gtk.scm
>> index 47d4c1808f..752c9f456d 100644
>> --- a/gnu/packages/gtk.scm
>> +++ b/gnu/packages/gtk.scm
>> @@ -1032,7 +1032,9 @@ (define-public gtk+
>>             mesa
>>             pango
>>             wayland
>> -           wayland-protocols))
>> +           wayland-protocols
>> +           ;; When broadway backend is enabled gdk-3.0 requires
>> zlib.
>> +           zlib))
>>      (inputs
>>       (list colord-minimal               ;to prevent a cycle with
>> inkscape
>>             cups
>> @@ -1087,6 +1089,15 @@ (define-public gtk+
>>            (add-after 'unpack 'generate-gdk-pixbuf-loaders-cache-file
>>              (assoc-ref glib-or-gtk:%standard-phases
>>                         'generate-gdk-pixbuf-loaders-cache-file))
>> +          (add-after 'unpack 'add-zlib-to-gdk-3.0.pc
>> +            (lambda _
>> +              ;; When -Dbroadway_backend=true zlib is added as a
>> dependency to
>> +              ;; gdk-3.0 but isn't done correctly and can cause pkg-
>> config to
>> +              ;; not add the correct -L...-zlib/lib flag.
>> +              (substitute* "meson.build"
>> +                (("pc_gdk_extra_libs += \\['-lz'\\]") "")
>> +                (("^gdk_packages \\+= cairo_packages" all)
>> +                 (string-append all "\ngdk_packages += '
>> zlib'\n")))))
> Is there a good reason to do it this way?  I would hope that
> downstreams are already aware of this pkg-config variable.

It seems a problem that should be taken to upstream.  Then while
waiting, we could carry that patch, with a reference to the upstream
issue.

Jean-Pierre, could you please check if this issue is known with the GTK
project, else file it on there tracker and reference it as a comment
with your patch?

-- 
Thanks,
Maxim