unit-fail-monitor: add meson option to disable

Add an option to disable this feature.

Change-Id: Ifc953ad4bec492f7c6ca8190e4c6a0820b12630a
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meson.build b/meson.build
index 3f24805..ef7e203 100644
--- a/meson.build
+++ b/meson.build
@@ -149,15 +149,17 @@
     'src/dbus/xyz.openbmc_project.ObjectMapper.conf',
     install_dir: get_option('datadir') / 'dbus-1' / 'system.d')
 
-executable(
-    'phosphor-unit-failure-monitor',
-    [
-        'fail-monitor/main.cpp',
-        'fail-monitor/monitor.cpp',
-    ],
-    dependencies: [
-        cli11_dep,
-        phosphor_logging,
-    ],
-    install: true
-)
+if not get_option('unit-failure-monitor').disabled()
+    executable(
+        'phosphor-unit-failure-monitor',
+        [
+            'fail-monitor/main.cpp',
+            'fail-monitor/monitor.cpp',
+        ],
+        dependencies: [
+            cli11_dep,
+            phosphor_logging,
+        ],
+        install: true
+    )
+endif
diff --git a/meson_options.txt b/meson_options.txt
index 71f7241..bf610a6 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -4,3 +4,10 @@
     value: 'enabled',
     description: 'Build tests'
 )
+
+option(
+    'unit-failure-monitor',
+    type: 'feature',
+    value: 'enabled',
+    description: 'Build phosphor-unit-failure-monitor'
+)