build: Port to meson

meson is a build system focused on speed an ease of use, which
helps speeding up the software development. This patch adds meson
support along autotools.

docs/reference/libmm-glib/meson.build

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 Iñigo Martinez <inigomartinez@gmail.com>
+
+doc_module = mm_glib_name
+
+src_dirs = [
+  generated_inc,
+  libmm_glib_inc,
+]
+
+private_headers = [
+  'mm-common-helpers.h',
+  'mm-gdbus-test.h',
+  'mm-helpers.h',
+]
+
+scan_args = [
+  '--deprecated-guards="MM_DISABLE_DEPRECATED"',
+  '--rebuild-types',
+]
+
+mkdb_args = [
+  '--ignore-files=mm-gdbus-test.h',
+  '--ignore-files=mm-gdbus-test.c',
+]
+
+fixxref_args = [
+  '--html-dir=' + (mm_prefix / gnome.gtkdoc_html_dir(doc_module)),
+  '--extra-dir=' + mm_doc_path,
+]
+
+version_xml = configure_file(
+  input: 'version.xml.in',
+  output: '@BASENAME@',
+  configuration: version_conf,
+)
+
+gnome.gtkdoc(
+  doc_module,
+  main_xml: doc_module + '-docs.xml',
+  src_dir: src_dirs,
+  ignore_headers: private_headers,
+  include_directories: top_inc,
+  dependencies: libmm_glib_dep,
+  namespace: 'mm',
+  scan_args: scan_args,
+  mkdb_args: mkdb_args,
+  fixxref_args: fixxref_args,
+  html_assets: logos_pngs,
+  content_files: version_xml,
+  install: true,
+)