Switch to Meson

This makes it easier to extend in the future. Also, it will make it
easier to add (un)install targets and eventually, distribute files such
as systemd services.

meson.build

@@ -0,0 +1,68 @@
+project('cage', 'c',
+  version: '0.0.1',
+  license: 'MIT',
+  default_options: [
+    'c_std=c11',
+    'warning_level=3',
+    'werror=true',
+  ],
+)
+
+add_project_arguments(
+  [
+    '-DWLR_USE_UNSTABLE',
+    '-Wall',
+    '-Werror',
+    '-Wundef',
+    '-Wno-unused-parameter',
+  ],
+  language: 'c',
+)
+
+if get_option('buildtype').startswith('debug')
+  add_project_arguments('-DDEBUG', language : 'c')
+endif
+
+wlroots        = dependency('wlroots')
+wayland_protos = dependency('wayland-protocols', version: '>=1.14')
+wayland_server = dependency('wayland-server')
+xkbcommon      = dependency('xkbcommon')
+
+wl_protocol_dir = wayland_protos.get_pkgconfig_variable('pkgdatadir')
+wayland_scanner = find_program('wayland-scanner')
+wayland_scanner_server = generator(
+  wayland_scanner,
+  output: '@BASENAME@-protocol.h',
+  arguments: ['server-header', '@INPUT@', '@OUTPUT@'],
+)
+
+server_protocols = [
+  [wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
+]
+
+server_protos_headers = []
+
+foreach p : server_protocols
+  xml = join_paths(p)
+  server_protos_headers += wayland_scanner_server.process(xml)
+endforeach
+
+server_protos = declare_dependency(
+  sources: server_protos_headers,
+)
+
+cage_sources = [
+  'cage.c'
+]
+
+executable(
+  meson.project_name(),
+  cage_sources,
+  dependencies: [
+    server_protos,
+    wayland_server,
+    wlroots,
+    xkbcommon,
+  ],
+  install: true,
+)