[mutter/benzea/use-sysprof-prefix] meson: Use sysprof interface defintion from correct prefix

[Benjamin Berg <bberg src gnome org>]

commit ac8066a743a4be17453d8d06b3d4fcc261de4597
Author: Benjamin Berg <bberg redhat com>
Date:   Wed Jan 8 14:08:58 2020 +0100

    meson: Use sysprof interface defintion from correct prefix
    
    The sysprof interface definition may be installed to a prefix different
    from where mutter is going to be installed. Fetch the prefix from
    pkgconfig instead.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/993

 src/meson.build | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/meson.build b/src/meson.build
index fca40d8dc..a1af35d8a 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -712,7 +712,9 @@ if have_profiler
     'backends/meta-profiler.h',
   ]
 
-  dbus_interfaces_dir = join_paths(datadir, 'dbus-1', 'interfaces')
+  # sysprof does not export anything more specific than the prefix
+  sysprof_datadir = join_paths(sysprof_dep.get_pkgconfig_variable('prefix'), get_option('datadir'))
+  dbus_interfaces_dir = join_paths(sysprof_datadir, 'dbus-1', 'interfaces')
   sysprof3_dbus_file = join_paths(dbus_interfaces_dir, 'org.gnome.Sysprof3.Profiler.xml')
 
   dbus_sysprof3_profiler_built_sources = gnome.gdbus_codegen('meta-dbus-sysprof3-profiler',