+# From meson documentation:
+# In order to look for headers in a specific directory you can use args :
+# '-I/extra/include/dir, but this should only be used in exceptional cases for
+# includes that can't be detected via pkg-config and passed via dependencies.
+if libweston_dep.found()
+ if not prefix_path.contains('/usr')
+ dir_path_x11_backend = join_paths(prefix_path, 'include', libweston_version, 'libweston', 'backend-x11.h')
+ else
+ dir_path_x11_backend = join_paths(libweston_version, 'libweston', 'backend-x11.h')
+ endif
+
+ # do the test
+ if cc.has_header(dir_path_x11_backend)
+ config_h.set('HAVE_BACKEND_X11', 1)
+ endif
+endif
+