From 20ee2e533794e0d5a3437e5b272da0a648d73c3e Mon Sep 17 00:00:00 2001
From: Corey Halpin <chalpin@cs.wisc.edu>
Date: Wed, 8 Mar 2023 19:54:16 -0600
Subject: Add atk_only option to enable building a stub atk library

When built with atk_only, a stub library will be produced that can be used to
satisfy package dependencies but provides no functionality.
---
 meson.build       | 40 ++++++++++++++++++++++++----------------
 meson_options.txt |  4 ++++
 2 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/meson.build b/meson.build
index c83059fd..d938e093 100644
--- a/meson.build
+++ b/meson.build
@@ -127,7 +127,10 @@ gmodule_req_version = '>= 2.0.0'
 gio_req_version = '>= 2.28.0'
 libxml_req_version = '>= 2.9.1'
 
-libdbus_dep = dependency('dbus-1', version: libdbus_req_version)
+if not get_option('atk_only')
+  libdbus_dep = dependency('dbus-1', version: libdbus_req_version)
+endif
+
 glib_dep = dependency('glib-2.0', version: glib_req_version)
 gobject_dep = dependency('gobject-2.0', version: gobject_req_version)
 gio_dep = dependency('gio-2.0', version: gio_req_version)
@@ -166,10 +169,12 @@ dbus_alignments = [
   'dbus_int64_t',
 ]
 
-foreach a: dbus_alignments
-  at_spi_conf.set('ALIGNOF_' + a.underscorify().to_upper(),
-                  cc.alignment(a, prefix: '#include <dbus/dbus.h>', dependencies: libdbus_dep))
-endforeach
+if not get_option('atk_only')
+  foreach a: dbus_alignments
+    at_spi_conf.set('ALIGNOF_' + a.underscorify().to_upper(),
+                    cc.alignment(a, prefix: '#include <dbus/dbus.h>', dependencies: libdbus_dep))
+  endforeach
+endif
 
 at_spi_conf.set('ALIGNOF_DBIND_POINTER', cc.alignment('dbind_pointer', prefix: 'typedef void *dbind_pointer;'))
 at_spi_conf.set('ALIGNOF_DBIND_STRUCT', cc.alignment('dbind_struct', prefix: 'typedef struct { char s1; } dbind_struct;'))
@@ -191,18 +196,21 @@ else
   p2p_cflags = []
 endif
 
-install_data('at-spi2-atk.desktop',
-             install_dir: join_paths(get_option('libdir'), 'gnome-settings-daemon-3.0', 'gtk-modules'))
-
-subdir('xml')
-subdir('dbind')
-subdir('atspi')
-subdir('bus')
-subdir('registryd')
 subdir('atk')
-subdir('droute')
-subdir('atk-adaptor')
-subdir('tests')
+
+if not get_option('atk_only')
+  install_data('at-spi2-atk.desktop',
+               install_dir: join_paths(get_option('libdir'), 'gnome-settings-daemon-3.0', 'gtk-modules'))
+
+  subdir('xml')
+  subdir('dbind')
+  subdir('atspi')
+  subdir('bus')
+  subdir('registryd')
+  subdir('droute')
+  subdir('atk-adaptor')
+  subdir('tests')
+endif
 
 if get_option('docs')
   subdir('doc')
diff --git a/meson_options.txt b/meson_options.txt
index 11cde7bc..548cdf7e 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -36,3 +36,7 @@ option('disable_p2p',
        description: 'Disable peer-to-peer DBus connections for at-spi2-atk',
        type: 'boolean',
        value: false)
+option('atk_only',
+       description: 'Build only the ATK stub library without atspi or at-spi2-atk (UNSUPPORTED)',
+       type: 'boolean',
+       value: false)
-- 
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