meson: use non-deprecated systemd packageconfig

Systemd's packageconfig file has both `systemdsystemunitdir` and
`systemd_system_unit_dir` defined.  The non-underscore one appears
to be a deprecated alias[1].  Move to the non-deprecated /
underscore-separated variant.

[1]: https://github.com/systemd/systemd/commit/4908de44b0a0409f84a7cdc5641b114d6ce8ba03

Change-Id: I4e8c96d699449b78457a52c3f6602df125f120a9
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/dbus_sensor_tester/meson.build b/dbus_sensor_tester/meson.build
index deca75c..2a17442 100644
--- a/dbus_sensor_tester/meson.build
+++ b/dbus_sensor_tester/meson.build
@@ -1,17 +1,20 @@
-project('dbus-sensor-tester', 'cpp',
-        version : '1.0',
-        meson_version: '>=1.1.1',
-        default_options: [
-            'b_lto_mode=default',
-            'b_lto_threads=0',
-            'b_lto=true',
-            'b_ndebug=if-release',
-            'buildtype=debugoptimized',
-            'cpp_rtti=false',
-            'cpp_std=c++23',
-            'warning_level=3',
-            'werror=true',
-           ])
+project(
+    'dbus-sensor-tester',
+    'cpp',
+    version: '1.0',
+    meson_version: '>=1.1.1',
+    default_options: [
+        'b_lto_mode=default',
+        'b_lto_threads=0',
+        'b_lto=true',
+        'b_ndebug=if-release',
+        'buildtype=debugoptimized',
+        'cpp_rtti=false',
+        'cpp_std=c++23',
+        'warning_level=3',
+        'werror=true',
+    ],
+)
 
 # Project related links
 
@@ -28,111 +31,123 @@
 cxx = meson.get_compiler('cpp')
 build = get_option('buildtype')
 optimization = get_option('optimization')
-summary('Build Type',build, section : 'Build Info')
-summary('Optimization',optimization, section : 'Build Info')
+summary('Build Type', build, section: 'Build Info')
+summary('Optimization', optimization, section: 'Build Info')
 
 # Disable lto when compiling with no optimization
-if(get_option('optimization') == '0')
-  add_project_arguments('-fno-lto', language: 'cpp')
-  message('Disabling lto & its supported features as optimization is disabled')
+if (get_option('optimization') == '0')
+    add_project_arguments('-fno-lto', language: 'cpp')
+    message('Disabling lto & its supported features as optimization is disabled')
 endif
 
 # Add compiler arguments
 
 # -Wpedantic, -Wextra comes by default with warning level
 add_project_arguments(
-  cxx.get_supported_arguments([
-  '-Wcast-align',
-  '-Wconversion',
-  '-Wformat=2',
-  '-Wold-style-cast',
-  '-Woverloaded-virtual',
-  '-Wsign-conversion',
-  '-Wunused',
-  '-Wno-attributes',
-  ]),
-  language: 'cpp'
+    cxx.get_supported_arguments(
+        [
+            '-Wcast-align',
+            '-Wconversion',
+            '-Wformat=2',
+            '-Wold-style-cast',
+            '-Woverloaded-virtual',
+            '-Wsign-conversion',
+            '-Wunused',
+            '-Wno-attributes',
+        ],
+    ),
+    language: 'cpp',
 )
 
 if (cxx.get_id() == 'clang' and cxx.version().version_compare('>9.0'))
-add_project_arguments(
-  cxx.get_supported_arguments([
-    '-Weverything',
-    '-Wno-c++98-compat-pedantic',
-    '-Wno-c++98-compat',
-    '-Wno-documentation-unknown-command',
-    '-Wno-documentation',
-    '-Wno-exit-time-destructors',
-    '-Wno-global-constructors',
-    '-Wno-newline-eof',
-    '-Wno-padded',
-    '-Wno-shadow',
-    '-Wno-used-but-marked-unused',
-    '-Wno-weak-vtables',
-  ]),
-  language:'cpp')
+    add_project_arguments(
+        cxx.get_supported_arguments(
+            [
+                '-Weverything',
+                '-Wno-c++98-compat-pedantic',
+                '-Wno-c++98-compat',
+                '-Wno-documentation-unknown-command',
+                '-Wno-documentation',
+                '-Wno-exit-time-destructors',
+                '-Wno-global-constructors',
+                '-Wno-newline-eof',
+                '-Wno-padded',
+                '-Wno-shadow',
+                '-Wno-used-but-marked-unused',
+                '-Wno-weak-vtables',
+            ],
+        ),
+        language: 'cpp',
+    )
 endif
 
 # if compiler is gnu-gcc , and version is > 8.0 then we add few more
 # compiler arguments , we know that will pass
 
 if (cxx.get_id() == 'gcc' and cxx.version().version_compare('>8.0'))
-  add_project_arguments(
-    cxx.get_supported_arguments([
-     '-Wduplicated-cond',
-     '-Wduplicated-branches',
-     '-Wlogical-op',
-     '-Wunused-parameter',
-     '-Wnull-dereference',
-     '-Wdouble-promotion',
-     ]),
-    language:'cpp')
+    add_project_arguments(
+        cxx.get_supported_arguments(
+            [
+                '-Wduplicated-cond',
+                '-Wduplicated-branches',
+                '-Wlogical-op',
+                '-Wunused-parameter',
+                '-Wnull-dereference',
+                '-Wdouble-promotion',
+            ],
+        ),
+        language: 'cpp',
+    )
 endif
 
 # Find the dependency modules, if not found use meson wrap to get them
 # automatically during the configure step
 dependencies = []
 
-sdbusplus = dependency('sdbusplus', required : false, include_type: 'system')
+sdbusplus = dependency('sdbusplus', required: false, include_type: 'system')
 if not sdbusplus.found()
-  sdbusplus_proj = subproject('sdbusplus', required: true)
-  sdbusplus = sdbusplus_proj.get_variable('sdbusplus_dep')
-  sdbusplus = sdbusplus.as_system('system')
+    sdbusplus_proj = subproject('sdbusplus', required: true)
+    sdbusplus = sdbusplus_proj.get_variable('sdbusplus_dep')
+    sdbusplus = sdbusplus.as_system('system')
 endif
 dependencies += sdbusplus
 
-cli11 = dependency('cli11', required : false, include_type: 'system')
+cli11 = dependency('cli11', required: false, include_type: 'system')
 if not cli11.found()
-  cli11_proj = subproject('cli11', required: true)
-  cli11 = cli11_proj.get_variable('CLI11_dep')
-  cli11 = cli11.as_system('system')
+    cli11_proj = subproject('cli11', required: true)
+    cli11 = cli11_proj.get_variable('CLI11_dep')
+    cli11 = cli11.as_system('system')
 endif
 dependencies += cli11
 
 systemd = dependency('systemd')
 dependencies += [systemd]
 
-boost = dependency('boost', version : '>=1.78.0', required : false, include_type: 'system')
+boost = dependency(
+    'boost',
+    version: '>=1.78.0',
+    required: false,
+    include_type: 'system',
+)
 if not boost.found()
-  subproject('boost', required: false)
-  boost_inc = include_directories('subprojects/boost_1_78_0/', is_system:true)
-  boost  = declare_dependency(include_directories : boost_inc)
-  boost = boost.as_system('system')
+    subproject('boost', required: false)
+    boost_inc = include_directories('subprojects/boost_1_78_0/', is_system: true)
+    boost = declare_dependency(include_directories: boost_inc)
+    boost = boost.as_system('system')
 endif
 dependencies += boost
 
-srcfiles_sensortest = [
-]
+srcfiles_sensortest = []
 
-systemd_system_unit_dir = systemd.get_variable('systemdsystemunitdir')
-bindir = get_option('prefix') + '/' +get_option('bindir')
+systemd_system_unit_dir = systemd.get_variable('systemd_system_unit_dir')
+bindir = get_option('prefix') + '/' + get_option('bindir')
 
 # Generate the executable
 executable(
-  'sensortest',
-  srcfiles_sensortest + ['main.cpp'],
-  dependencies: dependencies,
-  link_args: '-Wl,--gc-sections',
-  install: true,
-  install_dir: bindir
+    'sensortest',
+    srcfiles_sensortest + ['main.cpp'],
+    dependencies: dependencies,
+    link_args: '-Wl,--gc-sections',
+    install: true,
+    install_dir: bindir,
 )