[gtk] Conan 2.x migration #29172

uilianries · 2025-12-17T17:01:59Z

Summary

Changes to recipe: gtk/4.18.6

Motivation

The current Conan recipe for GTK needs to be ported for Conan 2.x

Details

This is a WIP, but I'm able to build it on Linux so far. Unfortunately, I could not cross-build for ARMv8 nor for Android due to compilation errors, but related to its dependencies.

The latest stable GTK-4 version is 4.20.4 (see https://www.gtk.org/), however, since 4.19.2 the dependency rsvg was introduced (https://gitlab.gnome.org/GNOME/gtk/-/commit/afa0d2341a442d356f91ee0a9f7b168cf14d628a) and we still don't have it available in ConanCenterIndex. Then the version 4.18.6 is latest that we can build without that.

When building GTK, it resulted in a massive version conflict, mostly due glib: It requires version 2.80: https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L15 And its dependencies are using 2.78 mostly.

For Cairo, the required version is 1.18.2 (https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L25), but only 1.18.0 is available in CCI. Which resulted in a bump version.

But when building Cairo 1.18.2, it resulted in it requires fontconfig 2.13 (https://gitlab.com/freedesktop-sdk/mirrors/freedesktop/cairo/cairo/-/blob/1.18.4/meson.build?ref_type=tags#L11), which is available in CCI, but later, Pango 1.57.0 requires fontconfig 2.17.0, which resulted in a bump version as well

In a following step, GTK needs some variables available in Graphene .pc file (https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L731), but we don't expose them, resulting in an error during GTK setup. I added those expected variables in the Graphene, but I'm not 100% sure, as those variables are evaluated by the consumer and may differ from the built package.

Both Harfbuzz library and its subset library are required by GTK too (https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L435), but subset is not enabled by default. Only enabling it is not enough; it should generate a .pc as well and the upstream generates one: https://github.com/harfbuzz/harfbuzz/blob/11.4.1/CMakeLists.txt#L982

The Pango dependency also requires a newer version than available in CCI 1.56.0 (https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L18). I updated it as well in a new bump version.

The wayland package also resulted in a version conflict; GTK requires 1.23.0 (https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L28), needed to update xkbcommon recipes to fix the conflict.

The GTK only generates a shared library: https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/gtk/meson.build?ref_type=tags#L1128. Other libraries are static and private libraries; they are linked to the shared library in the end.

Linux build logs:

Linux + amd64 + GCC13 + Release + X11 + All Deps Shared: gtk-4.18.6-linux-amd64-gcc13-release-x11-shared.log
Linux + amd64 + GCC13 + Release + X11 + All Deps Static: gtk-4.18.6-linux-amd64-gcc13-release-x11-static.log
Linux + amd64 + GCC13 + Release + Wayland + All Deps Static: gtk-4.18.6-linux-amd64-gcc13-release-wayland-static.log
Linux + amd64 + GCC13 + Release + Wayland + All Deps Shared: gtk-4.18.6-linux-amd64-gcc13-release-wayland-shared.log

Still need to validate it on Mac and Windows and a clean-up.

Read the contributing guidelines
Checked that this PR is not a duplicate: list of PRs by recipe
If this is a bug fix, please link related issue or provide bug details
Tested locally with at least one configuration using a recent version of Conan

Add a 👍 reaction to pull requests you find important to help the team prioritize, thanks!

Signed-off-by: Uilian Ries <[email protected]>

uilianries · 2025-12-17T17:04:59Z

recipes/gdk-pixbuf/all/conanfile.py

-        replace_in_file(self, gdk_meson_build,
-                        "dependencies: gdk_pixbuf_deps + [ gdkpixbuf_dep ],",
-                        "dependencies: loaders_deps + gdk_pixbuf_deps + [ gdkpixbuf_dep ],")
+        if Version(self.version) < "2.44.4":


It's fixed already in the new versions: https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/2.44.4/gdk-pixbuf/meson.build?ref_type=tags#L162

uilianries · 2025-12-17T17:09:13Z

recipes/graphene/all/conanfile.py

+        pkgconfig_vars = {"graphene_has_gcc": 1 if self.settings.compiler == "gcc" else 0,
+                          "graphene_has_sse2": 1 if str(self.settings.arch) in ["x86", "x86_64"] else 0,
+                          "graphene_has_neon": 1 if str(self.settings.arch).startswith("arm") else 0,
+                          "graphene_has_scalar": 1}


scalar is enabled by default: https://github.com/ebassi/graphene/blob/1.10.8/meson.build#L409

gcc requires gcc: https://github.com/ebassi/graphene/blob/1.10.8/meson.build#L409

neon requires a default enabled option + an arm build to validate: https://github.com/ebassi/graphene/blob/1.10.8/meson.build#L359.

sse2 requires a default enabled option + an build to validate: https://github.com/ebassi/graphene/blob/1.10.8/meson.build#L294

uilianries · 2025-12-17T17:11:21Z

recipes/gtk/all/test_package/CMakeLists.txt

-
-include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
-conan_basic_setup()
+find_package(gtk REQUIRED CONFIG)


CMake recommends using pkg_check_modules for GTK:

https://cmake.org/cmake/help/latest/module/FindGTK2.html#examples-finding-gtk-version-3-or-later

The GTK project does not generate .cmake files as well.

uilianries · 2025-12-17T17:13:09Z

recipes/gtk/all/conanfile.py

+        env = VirtualRunEnv(self)
+        env.generate(scope="build")
+
+        tc = MesonToolchain(self)


Based on https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.options

Signed-off-by: Uilian Ries <[email protected]>

uilianries · 2025-12-19T13:06:10Z

I'm able to build on Mac + static: gtk-4.18.6-mac-armv8-clang17-rel-static.log

For shared I'm still investigating a linkage error.

Signed-off-by: Uilian Ries <[email protected]>

uilianries · 2025-12-22T10:32:12Z

recipes/pango/all/conanfile.py

        replace_in_file(self, meson_build, "subdir('tools')", "")
        replace_in_file(self, meson_build, "subdir('utils')", "")
        replace_in_file(self, meson_build, "subdir('examples')", "")
+        if Version(self.version) < "1.54.0":


tc.extra_cflags.append("-Wno-error") is not enough, the project compiler flags override what is defined by Conan meson toolchain file.

Signed-off-by: Uilian Ries <[email protected]>

uilianries · 2025-12-22T13:59:21Z

recipes/cairo/all/conandata.yml

@@ -1,4 +1,7 @@
 sources:
+  "1.18.4":


GTK4 requires Cairo >=1.18.2: https://gitlab.gnome.org/GNOME/gtk/-/blob/4.18.6/meson.build?ref_type=tags#L25
Pango requires Cairo >=1.18.0: https://gitlab.gnome.org/GNOME/pango/-/blob/1.57.0/meson.build?ref_type=tags#L218

uilianries · 2025-12-22T14:06:35Z

recipes/cairo/all/conanfile.py


        # Dependency freetype2 found: NO found 2.11.0 but need: '>= 9.7.3'
        if self.options.with_freetype:
+            source_freetype_version = "9.7.3" if Version(self.version) < "1.18.4" else "23.0.17"


It's a bit hard to track Cairo without a public git browse. Here Cairo's 1.18.4 Meson build file: [meson.build](https://github.com/user-attachments/files/24292774/
meson.build.txt)

It requires Freetype >=23.0.17
Fontconfig >=2.13.0. Still, the version range is to avoid version conflict as spotted locally
Glib >=2.14 but using version ranges to avoid conflict with GTK needing a newer version.

uilianries · 2025-12-22T14:10:48Z

recipes/fontconfig/all/conandata.yml

@@ -1,4 +1,7 @@
 sources:
+  "2.17.1":


Pango 1.57.0 wants fontconfig >=2.17.0: https://gitlab.gnome.org/GNOME/pango/-/blob/1.57.0/meson.build?ref_type=tags#L216

Signed-off-by: Uilian Ries <[email protected]>

uilianries · 2025-12-22T14:39:09Z

recipes/gtk/config.yml

+    "4.18.6":
+        folder: all
    "system":
        folder: "system"


Should we remove gtk/system too? The only "advantage" is installing GTK-2 and GTK-3.

uilianries · 2025-12-22T14:40:15Z

recipes/harfbuzz/all/conanfile.py

-                self.cpp_info.system_libs.append(libcxx)
+                self.cpp_info.components["core"].system_libs.append(libcxx)
+
+        if self.options.with_icu:


This is not a housekeeping, but exposing those expected .pc files. GTK-4 expects harfbuzz-subset.pc

uilianries · 2025-12-22T14:54:02Z

recipes/fontconfig/all/conandata.yml

@@ -1,4 +1,7 @@
 sources:
+  "2.17.1":
+    url: "https://gitlab.freedesktop.org/api/v4/projects/890/packages/generic/fontconfig/2.17.1/fontconfig-2.17.1.tar.xz"


The download link changed: https://www.freedesktop.org/wiki/Software/fontconfig/

The current stable series is 2.17.0. Releases until 2.16.0 are available in the release directory and Releases after that are available in the GitLab.

uilianries · 2025-12-22T15:10:16Z

Linux test package failed due to a missing system runtime library. In terms of changes, this PR is ready for review.

uilianries added 25 commits December 16, 2025 11:45

Remove old versions

38309c0

Signed-off-by: Uilian Ries <[email protected]>

Adjust test package for Conan 2.x

aeba351

Signed-off-by: Uilian Ries <[email protected]>

Maintain only 4.20.3 stable

21a3dcb

Signed-off-by: Uilian Ries <[email protected]>

WIP: Add Conan 2.x support

a7393f6

Signed-off-by: Uilian Ries <[email protected]>

Adjust requirements

f44666a

Signed-off-by: Uilian Ries <[email protected]>

Use version ranges for glib in Cairo recipe

413f259

Signed-off-by: Uilian Ries <[email protected]>

Add version 1.57.0 for Pango

aad7fe4

Signed-off-by: Uilian Ries <[email protected]>

Add version range for glib in Pango recipe

d20a8d6

Signed-off-by: Uilian Ries <[email protected]>

Use version ranges for glib in Harfbuzz recipe

091338a

Signed-off-by: Uilian Ries <[email protected]>

Add fontconfig 2.17.1

1eab3ff

Signed-off-by: Uilian Ries <[email protected]>

Use fontconfig version range in libxft recipe

810fb86

Signed-off-by: Uilian Ries <[email protected]>

Use fontconfig version range in cairo recipe

7250104

Signed-off-by: Uilian Ries <[email protected]>

Add fontconfig version range in Pango recipe

8e3a574

Signed-off-by: Uilian Ries <[email protected]>

Add Cairo 1.18.4

f0cc54f

Signed-off-by: Uilian Ries <[email protected]>

Enable subset option for Harfbuzz

5f21064

Signed-off-by: Uilian Ries <[email protected]>

Fix Harfbuzz cppinfo components

8c138ad

Signed-off-by: Uilian Ries <[email protected]>

Use cairo version range in Pango recipe

0715766

Signed-off-by: Uilian Ries <[email protected]>

Use glib version range in Graphene recipe

3ef1b45

Signed-off-by: Uilian Ries <[email protected]>

Add pkgconfig variables

80ae005

Signed-off-by: Uilian Ries <[email protected]>

Add version range for glib in gdk-pixbuf

00de4b3

Signed-off-by: Uilian Ries <[email protected]>

First build on Linux

974853a

Signed-off-by: Uilian Ries <[email protected]>

Use wayland version range in XkbCommon recipe

781be2e

Signed-off-by: Uilian Ries <[email protected]>

Update cpp_info for wayland

3450cf7

Signed-off-by: Uilian Ries <[email protected]>

xkbcommon is required for wayland only

1ea09a9

Signed-off-by: Uilian Ries <[email protected]>

xkbcommon is only for wayland

137a85e

Signed-off-by: Uilian Ries <[email protected]>

uilianries commented Dec 17, 2025

View reviewed changes

Protect harfbuzz binding for native build only

6becf1e

Signed-off-by: Uilian Ries <[email protected]>

uilianries added 2 commits December 19, 2025 13:32

libdrm is for linux only

6cd9e7c

Signed-off-by: Uilian Ries <[email protected]>

Allow gdk-pixbuf undefined defines from dependencies

d612e93

Signed-off-by: Uilian Ries <[email protected]>

uilianries and others added 8 commits December 19, 2025 14:59

Fix shared apple install rpath

5de924f

Signed-off-by: Uilian Ries <[email protected]>

Use new check to avoid the linter

a11fca7

Signed-off-by: Uilian Ries <[email protected]>

Graphene and Cairo are not used by msvc

5c4fe49

Signed-off-by: Uilian Ries <[email protected]>

Cairo and Graphene are always required

bfa7e74

Signed-off-by: Uilian Ries <[email protected]>

Add pkgconfig file for Windows

943aead

Signed-off-by: Uilian Ries <[email protected]>

Generate .pc for macos

a40d631

Signed-off-by: Uilian Ries <[email protected]>

Add comments to prove transitive headers

a3a7e79

Signed-off-by: Uilian Ries <[email protected]>

Patch pango array-bounds compiler error

7a56b96

Signed-off-by: Uilian Ries <[email protected]>

uilianries commented Dec 22, 2025

View reviewed changes

uilianries added 3 commits December 22, 2025 13:41

move wayland protocols

5138a13

Signed-off-by: Uilian Ries <[email protected]>

Fix cpp_info for wayland-protocols

20a3cc7

Signed-off-by: Uilian Ries <[email protected]>

4.20.3 from conandata

5b7c14a

Signed-off-by: Uilian Ries <[email protected]>

uilianries commented Dec 22, 2025

View reviewed changes

Revert gdk-pixbuf

d562228

Signed-off-by: Uilian Ries <[email protected]>

uilianries commented Dec 22, 2025

View reviewed changes

uilianries added the infrastructure Waiting on tools or services belonging to the infra label Dec 22, 2025

uilianries marked this pull request as ready for review December 22, 2025 15:07

[gtk] Conan 2.x migration #29172

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[gtk] Conan 2.x migration #29172

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uilianries commented Dec 19, 2025

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uilianries commented Dec 22, 2025

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uilianries commented Dec 17, 2025 •

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