Add gtk4 (#4767)

packages/gtk4.rb

+require 'package'
+
+class Gtk4 < Package
+  description 'GTK+ is a multi-platform toolkit for creating graphical user interfaces.'
+  homepage 'https://developer.gnome.org/gtk4/'
+  version '4.0'
+  compatibility 'all'
+  source_url 'https://download.gnome.org/sources/gtk/4.0/gtk-4.0.0.tar.xz'
+  source_sha256 'd46cf5b127ea27dd9e5d2ff6ed500cb4067eeb2cb1cd2c313ccde8013b0b9bf9'
+
+
+
+  depends_on 'cups'
+  depends_on 'at_spi2_atk'
+  depends_on 'gnome_icon_theme'
+  depends_on 'gobject_introspection'
+  depends_on 'gdk_pixbuf'
+  depends_on 'graphene'
+  depends_on 'hicolor_icon_theme'
+  depends_on 'iso_codes'
+  depends_on 'json_glib'
+  depends_on 'libepoxy'
+  depends_on 'libxkbcommon'
+  depends_on 'llvm' => :build
+  depends_on 'shared_mime_info'
+  depends_on 'six' => :build
+  depends_on 'xdg_base'
+  depends_on 'pygments' => :build
+  
+  def self.build
+    ENV['CFLAGS'] = "-fuse-ld=lld"
+    ENV['CXXFLAGS'] = "-fuse-ld=lld"
+    system "meson #{CREW_MESON_OPTIONS} \
+    -Dbroadway-backend=true \
+    -Ddemos=false\
+    -Dbuild-examples=false \
+    -Dbuild-tests=false \
+    -Dgraphene:default_library=both \
+    -Dlibsass:default_library=both \
+    -Dmutest:default_library=both \
+    -Dsassc:default_library=both \
+    build"
+    system "meson configure build"
+    system 'ninja -C build'
+  end
+
+  def self.install
+    system "DESTDIR=#{CREW_DEST_DIR} ninja -C build install"
+  end
+
+  def self.postinstall
+    # generate schemas
+    system "glib-compile-schemas #{CREW_PREFIX}/share/glib-2.0/schemas"
+    # update mime database
+    system "update-mime-database #{CREW_PREFIX}/share/mime"
+    puts
+    puts "To add basic settings, execute the following:".lightblue
+    puts "mkdir #{HOME}/.config/gtk-4.0".lightblue
+    puts "cat << 'EOF' > #{HOME}/.config/gtk-4.0/settings.ini
+[Settings]
+gtk-application-prefer-dark-theme = false
+gtk-icon-theme-name = hicolor
+gtk-fallback-icon-theme = gnome
+gtk-font-name = Arial 10
+EOF".lightblue
+    puts
+  end
+end