package/polkit: drop dbus build dependency

Drop dbus build dependency to avoid the following build failure since
commit 1db1322639 if systemd-polkit is
enabled:

package/dbus/dbus.mk:124: *** Recursive variable 'DBUS_FINAL_RECURSIVE_DEPENDENCIES' references itself (eventually).  Stop.

Fixes:
 - http://autobuild.buildroot.org/results/0e038fae0f5fc2db3e85be05db4612e4f2395e35

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/polkit/0003-build-Remove-redundant-computation-of-dbus-data-directory.patch

@@ -0,0 +1,35 @@
+From 9fa097f4dde92a0c1675400228b4cb965ed3e123 Mon Sep 17 00:00:00 2001
+From: Simon McVittie <smcv@debian.org>
+Date: Thu, 3 Jun 2021 18:55:29 +0100
+Subject: [PATCH] build: Remove redundant computation of dbus data directory
+
+We were asking pkg-config "if I define ${datadir} to pk_prefix/pk_datadir,
+what would ${datadir} be?" but the answer is obviously always going to be
+pk_prefix/pk_datadir.
+
+Signed-off-by: Simon McVittie <smcv@debian.org>
+
+[Retrieved (and slightly updated for duktape fork) from:
+https://gitlab.freedesktop.org/polkit/polkit/-/commit/9fa097f4dde92a0c1675400228b4cb965ed3e123]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ meson.build | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/meson.build b/meson.build
+index 6a6799e..03a7683 100644
+--- a/meson.build
++++ b/meson.build
+@@ -136,8 +136,7 @@ assert(cc.has_function('XML_ParserCreate', dependencies: expat_dep), 'Can\'t fin
+ endif
+ 
+ dbus_dep = dependency('dbus-1')
+-dbus_confdir = dbus_dep.get_pkgconfig_variable('datadir', define_variable: ['datadir', pk_prefix / pk_datadir])   #changed from sysconfdir with respect to commit#8eada3836465838
+-dbus_policydir = dbus_confdir / 'dbus-1/system.d'
++dbus_policydir = pk_prefix / pk_datadir / 'dbus-1/system.d'
+ dbus_system_bus_services_dir = dbus_dep.get_pkgconfig_variable('system_bus_services_dir', define_variable: ['datadir', pk_prefix / pk_datadir])
+ 
+ # check OS
+-- 
+GitLab
+

package/polkit/0004-build-Don-t-require-dbus-development-files.patch

@@ -0,0 +1,42 @@
+From 4bb2157adae620c8b07caf5a24b177d1f90f2fbb Mon Sep 17 00:00:00 2001
+From: Simon McVittie <smcv@debian.org>
+Date: Thu, 3 Jun 2021 18:57:00 +0100
+Subject: [PATCH] build: Don't require dbus development files
+
+We don't actually need libdbus, only the dbus-daemon's installation
+directory for system services, which in practice is always going to be
+/usr/share/dbus-1/system-services.
+
+Signed-off-by: Simon McVittie <smcv@debian.org>
+
+[Retrieved (and slightly updated for duktape fork) from:
+https://gitlab.freedesktop.org/polkit/polkit/-/commit/4bb2157adae620c8b07caf5a24b177d1f90f2fbb]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ meson.build | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/meson.build b/meson.build
+index 03a7683..539ec7a 100644
+--- a/meson.build
++++ b/meson.build
+@@ -135,9 +135,14 @@ assert(cc.has_function('XML_ParserCreate', dependencies: expat_dep), 'Can\'t fin
+   js_dep = dependency('mozjs-78')
+ endif
+ 
+-dbus_dep = dependency('dbus-1')
++dbus_dep = dependency('dbus-1', required: false)
+ dbus_policydir = pk_prefix / pk_datadir / 'dbus-1/system.d'
+-dbus_system_bus_services_dir = dbus_dep.get_pkgconfig_variable('system_bus_services_dir', define_variable: ['datadir', pk_prefix / pk_datadir])
++if dbus_dep.found()
++  dbus_system_bus_services_dir = dbus_dep.get_pkgconfig_variable('system_bus_services_dir', define_variable: ['datadir', pk_prefix / pk_datadir])
++else
++  # libdbus development files not installed, assume a standard layout
++  dbus_system_bus_services_dir = pk_prefix / pk_datadir / 'dbus-1' / 'system-services'
++endif
+ 
+ # check OS
+ host_system = host_machine.system()
+-- 
+GitLab
+

package/polkit/Config.in

@@ -5,7 +5,7 @@ config BR2_PACKAGE_POLKIT
 	depends on BR2_USE_MMU # libglib2, dbus
 	depends on BR2_USE_WCHAR # libglib2
 	depends on !BR2_STATIC_LIBS # duktape
-	select BR2_PACKAGE_DBUS
+	select BR2_PACKAGE_DBUS # runtime
 	select BR2_PACKAGE_DUKTAPE
 	select BR2_PACKAGE_EXPAT
 	select BR2_PACKAGE_LIBGLIB2

package/polkit/polkit.mk

@@ -12,7 +12,7 @@ POLKIT_CPE_ID_VENDOR = polkit_project
 POLKIT_INSTALL_STAGING = YES
 
 POLKIT_DEPENDENCIES = \
-	dbus duktape libglib2 host-intltool expat $(TARGET_NLS_DEPENDENCIES)
+	duktape libglib2 host-intltool expat $(TARGET_NLS_DEPENDENCIES)
 
 POLKIT_LDFLAGS = $(TARGET_NLS_LIBS)