https://bugs.gentoo.org/653136

From 3c08d28fbae8b0ef3839ef26f8d2a713a9a684f9 Mon Sep 17 00:00:00 2001
From: Andreas Sturmlechner <asturm@gentoo.org>
Date: Thu, 21 Feb 2019 23:53:19 +0100
Subject: [PATCH] Make dbus daemon build optional

--- a/bus/Makefile.am
+++ b/bus/Makefile.am
@@ -76,6 +76,7 @@ agentdir=$(LAUNCHD_AGENT_DIR)
 agent_DATA=org.freedesktop.dbus-session.plist
 endif
 
+if DBUS_DAEMON
 if DBUS_BUS_ENABLE_KQUEUE
 DIR_WATCH_SOURCE=dir-watch-kqueue.c
 else
@@ -230,6 +231,7 @@ EXTRA_DIST += \
 	tmpfiles.d/dbus.conf.in \
 	tmpfiles.d/meson.build \
 	$(NULL)
+endif DBUS_DAEMON
 
 if HAVE_SYSTEMD
 systemdsystemunit_DATA = \
--- a/configure.ac
+++ b/configure.ac
@@ -211,6 +211,7 @@ AC_ARG_ENABLE([apparmor],
   [enable_apparmor=$enableval],
   [enable_apparmor=auto])
 AC_ARG_ENABLE(libaudit,AS_HELP_STRING([--enable-libaudit],[build audit daemon support for SELinux]),enable_libaudit=$enableval,enable_libaudit=auto)
+AC_ARG_ENABLE(daemon, AS_HELP_STRING([--enable-daemon],[build with the dbus daemon]),enable_daemon=$enableval,enable_daemon=yes)
 AC_ARG_ENABLE(inotify, AS_HELP_STRING([--enable-inotify],[build with inotify support (linux only)]),enable_inotify=$enableval,enable_inotify=auto)
 AC_ARG_ENABLE(kqueue, AS_HELP_STRING([--enable-kqueue],[build with kqueue support]),enable_kqueue=$enableval,enable_kqueue=auto)
 AC_ARG_ENABLE(console-owner-file, AS_HELP_STRING([--enable-console-owner-file],[enable console owner file]),enable_console_owner_file=$enableval,enable_console_owner_file=auto)
@@ -658,7 +659,20 @@ AC_CHECK_MEMBER([struct unpcbid.unp_pid],
                 [],
                 [[#include <sys/un.h>]])
 
-PKG_CHECK_MODULES([EXPAT], [expat])
+# dbusdaemon checks
+if test x$enable_daemon = xno ; then
+    have_daemon=no
+else
+    have_daemon=yes
+fi
+
+dnl check if daemon shall be built
+if test x$have_daemon = xyes; then
+   AC_DEFINE(DBUS_DAEMON,1,[Use daemon])
+   PKG_CHECK_MODULES([EXPAT], [expat])
+fi
+
+AM_CONDITIONAL(DBUS_DAEMON, test x$have_daemon = xyes)
 
 save_cflags="$CFLAGS"
 save_libs="$LIBS"
@@ -1748,6 +1762,7 @@ echo "
         Building bus stats API:   ${enable_stats}
         Building SELinux support: ${have_selinux}
         Building AppArmor support: ${have_apparmor}
+        Building daemon:          ${have_daemon}
         Building inotify support: ${have_inotify}
         Building kqueue support:  ${have_kqueue}
         Building elogind support: ${have_elogind}