fix doc builds

Signed-off-by: Keith Wiles <[email protected]>

doc/api/meson.build

@@ -24,19 +24,19 @@ htmldir = join_paths(get_option('datadir'), 'doc', 'dpdk')
 # So use a configure option for now.
 example = custom_target('examples.dox',
 	output: 'examples.dox',
-	command: [generate_examples, join_paths(meson.source_root(), 'examples'), '@OUTPUT@'],
+	command: [generate_examples, join_paths(meson.project_source_root(), 'examples'), '@OUTPUT@'],
 	depfile: 'examples.dox.d',
 	install: get_option('enable_docs'),
 	install_dir: htmldir,
 	build_by_default: get_option('enable_docs'))
 
 cdata = configuration_data()
 cdata.set('VERSION', meson.project_version())
-cdata.set('API_EXAMPLES', join_paths(meson.build_root(), 'doc', 'api', 'examples.dox'))
-cdata.set('OUTPUT', join_paths(meson.build_root(), 'doc', 'api'))
+cdata.set('API_EXAMPLES', join_paths(meson.project_build_root(), 'doc', 'api', 'examples.dox'))
+cdata.set('OUTPUT', join_paths(meson.project_build_root(), 'doc', 'api'))
 cdata.set('HTML_OUTPUT', 'api')
-cdata.set('TOPDIR', meson.source_root())
-cdata.set('STRIP_FROM_PATH', meson.source_root())
+cdata.set('TOPDIR', meson.project_source_root())
+cdata.set('STRIP_FROM_PATH', meson.project_source_root())
 
 doxy_conf = configure_file(input: 'doxy-api.conf.in',
 	output: 'doxy-api.conf',