build: Split c++ sources into a subdirectory

Change-Id: Iedea50c688189ae4953195105e323f7173d17a4b
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meson.build b/meson.build
index 2b3afba..ce8534a 100644
--- a/meson.build
+++ b/meson.build
@@ -21,9 +21,6 @@
   get_option('default-ipv6-accept-ra'))
 conf_data.set('NIC_SUPPORTS_ETHTOOL', get_option('nic-ethtool'))
 conf_data.set('SYNC_MAC_FROM_INVENTORY', get_option('sync-mac'))
-conf_header = configure_file(
-  output: 'config.h',
-  configuration: conf_data)
 
 sdbusplus_dep = dependency('sdbusplus', required: false)
 if sdbusplus_dep.found()
@@ -36,93 +33,14 @@
   sdbuspp_gen_meson_prog = sdbusplus_proj.get_variable('sdbuspp_gen_meson_prog')
 endif
 
-phosphor_dbus_interfaces_dep = dependency('phosphor-dbus-interfaces')
-phosphor_logging_dep = dependency('phosphor-logging')
-
-generated_sources = [ conf_header ]
+generated_sources = []
 generated_others = []
 yaml_sources = []
 subdir('gen')
 subdir('gen/xyz')
+generated_includes = include_directories('gen')
 
-networkd_headers = include_directories('.', 'gen')
-
-executable(
-  'ncsi-netlink',
-  'argument.cpp',
-  'ncsi_netlink_main.cpp',
-  'ncsi_util.cpp',
-  implicit_include_directories: false,
-  include_directories: networkd_headers,
-  dependencies: [
-    dependency('libnl-3.0'),
-    dependency('libnl-genl-3.0'),
-    phosphor_dbus_interfaces_dep,
-    phosphor_logging_dep,
-  ],
-  install: true,
-  install_dir: get_option('bindir'))
-
-json_dep = declare_dependency()
-if get_option('sync-mac')
-  # nlohmann_json might not have a pkg-config. It is header only so just make
-  # sure we can access the needed symbols from the header.
-  has_json = meson.get_compiler('cpp').has_header_symbol(
-    'nlohmann/json.hpp',
-    'nlohmann::json::string_t',
-    required: false)
-  if not has_json
-    json_dep = dependency(
-      'nlohmann_json',
-      fallback: ['nlohmann_json', 'nlohmann_json_dep'],
-      required: true)
-  endif
-endif
-
-networkd_deps = [
-  json_dep,
-  phosphor_dbus_interfaces_dep,
-  phosphor_logging_dep,
-  sdbusplus_dep,
-  dependency('sdeventplus', fallback: ['sdeventplus', 'sdeventplus_dep']),
-  dependency('stdplus', fallback: ['stdplus', 'stdplus_dep']),
-]
-
-networkd_lib = static_library(
-  'networkd',
-  generated_sources,
-  'ethernet_interface.cpp',
-  'neighbor.cpp',
-  'ipaddress.cpp',
-  'netlink.cpp',
-  'network_config.cpp',
-  'network_manager.cpp',
-  'system_configuration.cpp',
-  'util.cpp',
-  'routing_table.cpp',
-  'config_parser.cpp',
-  'dhcp_configuration.cpp',
-  'vlan_interface.cpp',
-  'rtnetlink_server.cpp',
-  'dns_updater.cpp',
-  'watch.cpp',
-  implicit_include_directories: false,
-  include_directories: networkd_headers,
-  dependencies: networkd_deps)
-
-networkd_dep = declare_dependency(
-  sources: generated_sources,
-  dependencies: networkd_deps,
-  include_directories: networkd_headers,
-  link_with: networkd_lib)
-
-executable(
-  'phosphor-network-manager',
-  'network_manager_main.cpp',
-  implicit_include_directories: false,
-  dependencies: networkd_dep,
-  install: true,
-  install_dir: get_option('bindir'))
+subdir('src')
 
 configure_file(
   input: 'xyz.openbmc_project.Network.service.in',