Add Meson build

Meson is a meta-build system that has various advantages over Autotools:

 - it is fast
 - it is portable
 - it is easy to understand
 - it is well maintained

Various projects in the GNOME stack already moved to Meson, including
GTK+.

clutter-gtk/meson.build

+clutter_gtk_sources = [
+  'gtk-clutter-actor.c',
+  'gtk-clutter-embed.c',
+  'gtk-clutter-offscreen.c',
+  'gtk-clutter-texture.c',
+  'gtk-clutter-util.c',
+  'gtk-clutter-window.c',
+]
+
+clutter_gtk_headers = [
+  'clutter-gtk.h',
+
+  'gtk-clutter-actor.h',
+  'gtk-clutter-embed.h',
+  'gtk-clutter-texture.h',
+  'gtk-clutter-util.h',
+  'gtk-clutter-window.h',
+]
+
+install_headers(clutter_gtk_headers, subdir: gtk_clutter_api_path)
+
+gtk_clutter_version_conf = configuration_data()
+gtk_clutter_version_conf.set('CLUTTER_GTK_MAJOR_VERSION', gtk_clutter_major_version)
+gtk_clutter_version_conf.set('CLUTTER_GTK_MINOR_VERSION', gtk_clutter_minor_version)
+gtk_clutter_version_conf.set('CLUTTER_GTK_MICRO_VERSION', gtk_clutter_micro_version)
+gtk_clutter_version_conf.set('CLUTTER_GTK_VERSION', meson.project_version())
+configure_file(input: 'gtk-clutter-version.h.in',
+               output: 'gtk-clutter-version.h',
+               configuration: gtk_clutter_version_conf,
+               install: true,
+               install_dir: join_paths(gtk_clutter_includedir, gtk_clutter_api_path))
+
+clutter_gtk = shared_library(gtk_clutter_api_name, clutter_gtk_sources,
+                             soversion: soversion,
+                             version: libversion,
+                             dependencies: [ mathlib_dep, clutter_dep, gtk_dep ],
+                             include_directories: root_inc,
+                             c_args: common_cflags + gtk_clutter_debug_cflags + [
+                               '-DPREFIX="@0@"'.format(gtk_clutter_prefix),
+                               '-DLIBDIR="@0@"'.format(gtk_clutter_libdir),
+                               '-DG_LOG_DOMAIN="Clutter-Gtk"',
+                               '-DG_LOG_USE_STRUCTURED=1',
+                               '-DCLUTTER_GTK_COMPILATION',
+                             ],
+                             link_args: common_ldflags,
+                             install: true)
+
+clutter_gtk_dep = declare_dependency(link_with: clutter_gtk,
+                                     dependencies: [ mathlib_dep, clutter_dep, gtk_dep ],
+                                     include_directories: include_directories('.'))
+
+if not meson.is_cross_build()
+  gnome.generate_gir(clutter_gtk,
+                     sources: clutter_gtk_headers + clutter_gtk_sources,
+                     namespace: 'GtkClutter',
+                     nsversion: gtk_clutter_api_version,
+                     identifier_prefix: 'GtkClutter',
+                     symbol_prefix: 'gtk_clutter',
+                     export_packages: gtk_clutter_api_name,
+                     includes: [ 'Clutter-1.0', 'Gtk-3.0' ],
+                     install: true,
+                     extra_args: [
+                       '--c-include="clutter-gtk/clutter-gtk.h"',
+                       '-DCLUTTER_GTK_COMPILATION',
+                     ])
+endif

doc/meson.build

+subdir('xml')
+
+private_headers = [
+  'gtk-clutter-actor-internal.h',
+  'gtk-clutter-offscreen.h',
+]
+
+glib_prefix = dependency('glib-2.0').get_pkgconfig_variable('prefix')
+glib_docpath = join_paths(glib_prefix, 'share', 'gtk-doc', 'html')
+gtk_prefix = dependency('gtk+-3.0').get_pkgconfig_variable('prefix')
+gtk_docpath = join_paths(gtk_prefix, 'share', 'gtk-doc', 'html')
+clutter_prefix = dependency('clutter-1.0').get_pkgconfig_variable('prefix')
+clutter_docpath = join_paths(clutter_prefix, 'share', 'gtk-doc', 'html')
+
+docpath = join_paths(gtk_clutter_datadir, 'gtk-doc', 'html')
+
+gnome.gtkdoc(gtk_clutter_api_name,
+             main_xml: '@0@-docs.xml'.format(gtk_clutter_api_name),
+             src_dir: [
+               join_paths(meson.source_root(), 'clutter-gtk'),
+               join_paths(meson.build_root(), 'clutter-gtk'),
+             ],
+             dependencies: clutter_gtk_dep,
+             gobject_typesfile: gtk_clutter_api_name + '.types',
+             scan_args: [
+               '--rebuild-types',
+               '--ignore-decorators=CLUTTER_GTK_EXTERN',
+               '--ignore-headers=' + ' '.join(private_headers),
+             ],
+             fixxref_args: [
+               '--html-dir=@0@'.format(docpath),
+               '--extra-dir=@0@'.format(join_paths(glib_docpath, 'glib')),
+               '--extra-dir=@0@'.format(join_paths(glib_docpath, 'gobject')),
+               '--extra-dir=@0@'.format(join_paths(glib_docpath, 'gio')),
+               '--extra-dir=@0@'.format(join_paths(gtk_docpath, 'gtk3')),
+               '--extra-dir=@0@'.format(join_paths(gtk_docpath, 'gdk3')),
+               '--extra-dir=@0@'.format(join_paths(clutter_docpath, 'clutter-1.0')),
+             ],
+             install: true)
+

doc/xml/gtkdocentities.ent.in

+<!ENTITY package "@PACKAGE@">
+<!ENTITY package_bugreport "@PACKAGE_BUGREPORT@">
+<!ENTITY package_name "@PACKAGE_NAME@">
+<!ENTITY package_string "@PACKAGE_STRING@">
+<!ENTITY package_tarname "@PACKAGE_TARNAME@">
+<!ENTITY package_url "@PACKAGE_URL@">
+<!ENTITY package_version "@PACKAGE_VERSION@">

doc/xml/meson.build

+ent_conf = configuration_data()
+ent_conf.set('PACKAGE', 'Clutter-GTK')
+ent_conf.set('PACKAGE_BUGREPORT', 'https://bugzilla.gnome.org/enter_bug.cgi?product=clutter-gtk')
+ent_conf.set('PACKAGE_NAME', 'Clutter-GTK')
+ent_conf.set('PACKAGE_STRING', 'clutter-gtk')
+ent_conf.set('PACKAGE_TARNAME', '@0@-@1@'.format(meson.project_name(), meson.project_version()))
+ent_conf.set('PACKAGE_URL', '')
+ent_conf.set('PACKAGE_VERSION', meson.project_version())
+configure_file(input: 'gtkdocentities.ent.in', output: 'gtkdocentities.ent', configuration: ent_conf)

examples/meson.build

+examples = [
+  'gtk-clutter-events',
+  'gtk-clutter-multistage',
+  'gtk-clutter-test',
+  'gtk-clutter-test-actor',
+  'gtk-clutter-window-test',
+]
+
+foreach e: examples
+  executable(e, e + '.c',
+             dependencies: clutter_gtk_dep,
+             include_directories: root_inc,
+             c_args: common_cflags + [
+               '-DEXAMPLES_DATADIR="@0@"'.format(meson.current_source_dir()),
+             ])
+endforeach

meson.build

+project('clutter-gtk', 'c', version: '1.8.3',
+        license: 'LGPLv2.1+',
+        default_options: [
+          'buildtype=debugoptimized',
+          'c_std=c99',
+          'warning_level=1',
+        ],
+        meson_version: '>= 0.40.1')
+
+add_project_arguments([ '-D_XOPEN_SOURCE=500' ], language: 'c')
+
+cc = meson.get_compiler('c')
+host_system = host_machine.system()
+
+version = meson.project_version().split('.')
+gtk_clutter_major_version = version[0].to_int()
+gtk_clutter_minor_version = version[1].to_int()
+gtk_clutter_micro_version = version[2].to_int()
+
+gtk_clutter_api_version = '@0@.0'.format(gtk_clutter_major_version)
+
+if gtk_clutter_minor_version.is_odd()
+  gtk_clutter_interface_age = 0
+else
+  gtk_clutter_interface_age = gtk_clutter_micro_version
+endif
+
+gtk_clutter_api_name = '@0@-@1@'.format(meson.project_name(), gtk_clutter_api_version)
+gtk_clutter_api_path = join_paths(meson.project_name(), gtk_clutter_api_name)
+
+gtk_clutter_prefix = get_option('prefix')
+gtk_clutter_libdir = join_paths(gtk_clutter_prefix, get_option('libdir'))
+gtk_clutter_includedir = join_paths(gtk_clutter_prefix, get_option('includedir'))
+gtk_clutter_datadir = join_paths(gtk_clutter_prefix, get_option('datadir'))
+
+# maintaining compatibility with the previous libtool versioning
+# current = minor * 100 + micro - interface
+# revision = interface
+soversion = 0
+current = 100 * gtk_clutter_minor_version + gtk_clutter_micro_version - gtk_clutter_interface_age
+revision = gtk_clutter_interface_age
+libversion = '@0@.@1@.@2@'.format(soversion, current, revision)
+
+config_h = configuration_data()
+config_h.set_quoted('GETTEXT_PACKAGE', 'cluttergtk-@0@'.format(gtk_clutter_api_version))
+
+# Compiler flags
+common_cflags = []
+common_ldflags = []
+
+if cc.get_id() == 'msvc'
+  # Make MSVC more pedantic, this is a recommended pragma list
+  # from _Win32_Programming_ by Rector and Newcomer.  Taken from
+  # glib's msvc_recommended_pragmas.h--please see that file for
+  # the meaning of the warning codes used here
+  test_cflags = [
+    '-we4002',
+    '-we4003',
+    '-w14010',
+    '-we4013',
+    '-w14016',
+    '-we4020',
+    '-we4021',
+    '-we4027',
+    '-we4029',
+    '-we4033',
+    '-we4035',
+    '-we4045',
+    '-we4047',
+    '-we4049',
+    '-we4053',
+    '-we4071',
+    '-we4150',
+    '-we4819'
+  ]
+elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+  test_cflags = [
+    '-ffast-math',
+    '-fstrict-aliasing',
+    '-Wpointer-arith',
+    '-Wmissing-declarations',
+    '-Wformat=2',
+    '-Wstrict-prototypes',
+    '-Wmissing-prototypes',
+    '-Wnested-externs',
+    '-Wold-style-definition',
+    '-Wunused',
+    '-Wuninitialized',
+    '-Wshadow',
+    '-Wmissing-noreturn',
+    '-Wmissing-format-attribute',
+    '-Wredundant-decls',
+    '-Wlogical-op',
+    '-Wcast-align',
+    '-Wno-unused-local-typedefs',
+    '-Werror=implicit',
+    '-Werror=init-self',
+    '-Werror=main',
+    '-Werror=missing-braces',
+    '-Werror=return-type',
+    '-Werror=array-bounds',
+    '-Werror=write-strings',
+  ]
+else
+  test_cflags = []
+endif
+
+# Symbol visibility
+if get_option('default_library') != 'static'
+  if host_system == 'windows'
+    config_h.set('DLL_EXPORT', true)
+    config_h.set('CLUTTER_GTK_EXTERN', '__declspec(dllexport) extern')
+    if cc.get_id() != 'msvc'
+      test_cflags += ['-fvisibility=hidden']
+    endif
+  else
+    config_h.set('CLUTTER_GTK_EXTERN', '__attribute__((visibility("default"))) extern')
+    test_cflags += ['-fvisibility=hidden']
+  endif
+endif
+
+foreach cflag: test_cflags
+  if cc.has_argument(cflag)
+    common_cflags += cflag
+  endif
+endforeach
+
+if host_system == 'linux'
+  foreach ldflag: [ '-Wl,-Bsymbolic-functions', '-Wl,-z,relro', '-Wl,-z,now' ]
+    if cc.has_argument(ldflag)
+      common_ldflags += ldflag
+    endif
+  endforeach
+endif
+
+if host_system == 'darwin'
+  common_ldflags += [ '-compatibility_version=1', '-current_version=1.0', ]
+endif
+
+gtk_clutter_debug_cflags = []
+if get_option('buildtype').startswith('debug')
+  gtk_clutter_debug_cflags += '-DCLUTTER_GTK_ENABLE_DEBUG'
+elif get_option('buildtype') == 'release'
+  gtk_clutter_debug_cflags += '-DG_DISABLE_CAST_CHECKS'
+endif
+
+if gtk_clutter_minor_version.is_even()
+  gtk_clutter_debug_cflags += [
+    '-DGLIB_DISABLE_DEPRECATION_WARNINGS',
+    '-DCLUTTER_DISABLE_DEPRECATION_WARNINGS',
+    '-DGDK_DISABLE_DEPRECATION_WARNINGS',
+  ]
+endif
+
+# Dependencies
+clutter_req_version = '>= 1.23.7'
+gtk_req_version = '>= 3.21.0'
+
+mathlib_dep = cc.find_library('m', required: false)
+clutter_dep = dependency('clutter-1.0', version: clutter_req_version)
+gtk_dep = dependency('gtk+-3.0', version: gtk_req_version)
+
+configure_file(output: 'config.h', configuration: config_h) 
+
+pkgconf = configuration_data()
+pkgconf.set('prefix', gtk_clutter_prefix)
+pkgconf.set('exec_prefix', gtk_clutter_prefix)
+pkgconf.set('libdir', gtk_clutter_libdir)
+pkgconf.set('includedir', gtk_clutter_includedir)
+pkgconf.set('CLUTTER_GTK_API_VERSION', gtk_clutter_api_version)
+pkgconf.set('VERSION', meson.project_version())
+configure_file(input: 'clutter-gtk.pc.in',
+               output: 'clutter-gtk-@0@.pc'.format(gtk_clutter_api_version),
+               configuration: pkgconf,
+               install: true,
+               install_dir: join_paths(gtk_clutter_libdir, 'pkgconfig'))
+
+root_inc = include_directories('.')
+
+gnome = import('gnome')
+
+subdir('clutter-gtk')
+subdir('po')
+
+subdir('examples')
+
+if get_option('enable_docs')
+  subdir('doc')
+endif

meson_options.txt

+option('enable_docs',
+       type: 'boolean',
+       value: false,
+       description: 'Enable generating the API reference (depends on GTK-Doc)')

po/meson.build

+i18n = import('i18n')
+
+i18n.gettext('cluttergtk-1.0', preset: 'glib')