From 662be900adccafeac2a58f018741f3a50feb07f2 Mon Sep 17 00:00:00 2001
From: Fred Morcos <fred.morcos@open-xchange.com>
Date: Fri, 7 Aug 2026 10:52:00 +0200
Subject: [PATCH] meson: systemd

---
 meson.build               |  1 +
 meson.options             |  1 +
 meson/systemd/meson.build | 12 ++++++++++++
 3 files changed, 14 insertions(+)
 create mode 100644 meson/systemd/meson.build

diff --git a/meson.build b/meson.build
index 32878f47f5..c36bc13ab3 100644
--- a/meson.build
+++ b/meson.build
@@ -134,6 +134,7 @@ subdir('meson' / 'pcre')
 subdir('meson' / 'gssapi')
 subdir('meson' / 'crypt')
 subdir('meson' / 'unwind')
+subdir('meson' / 'systemd')
 
 dovecot_moduledir = get_option('moduledir')
 if dovecot_moduledir == ''
diff --git a/meson.options b/meson.options
index 0f70e6cb06..5829424ff3 100644
--- a/meson.options
+++ b/meson.options
@@ -14,6 +14,7 @@ option('random-source', type: 'string', value : '/dev/urandom', description: 'De
 option('ioloop', type: 'combo', choices: ['best', 'epoll', 'kqueue', 'poll', 'select'], value: 'best', description: 'I/O loop method to use (best for the fastest available)')
 option('notify', type: 'combo', choices: ['best', 'inotify', 'kqueue', 'none'], value: 'best', description: 'File system notification method to use (best for the fastest available)')
 option('libunwind', type: 'feature', value: 'auto', description: 'Build with libunwind support (better backtraces)')
+option('systemd', type: 'feature', value: 'auto', description: 'Build with systemd support (sd_notify and socket activation)')
 option('sodium', type: 'feature', value: 'auto', description: 'Build with libsodium support (enables argon2)')
 option('pcre', type: 'feature', value: 'auto', description: 'Build with libpcre2 support (enables regular expressions)')
 option('gssapi', type: 'combo', choices: ['disabled', 'enabled', 'auto', 'plugin'], value: 'disabled', description: 'Build with GSSAPI authentication support')
diff --git a/meson/systemd/meson.build b/meson/systemd/meson.build
new file mode 100644
index 0000000000..b678e6a188
--- /dev/null
+++ b/meson/systemd/meson.build
@@ -0,0 +1,12 @@
+# TODO: Autoconf also resolves systemdsystemunitdir from the systemd .pc file and installs
+# the unit files there. That belongs with the src/master port.
+
+ext_systemd = dependency('libsystemd', required: get_option('systemd'))
+
+conf.set(
+  'HAVE_LIBSYSTEMD',
+  ext_systemd.found(),
+  description: 'Have libsystemd',
+)
+
+summary({'systemd': ext_systemd}, section: 'Features')