From f4b936008505ef24efe3481845f6586709d7d425 Mon Sep 17 00:00:00 2001
From: Herman Semenoff <GermanAizek@yandex.ru>
Date: Thu, 30 Apr 2026 02:31:39 +0300
Subject: [PATCH] linux: fix building on Alpine Linux and many other distros

---
 meson.build       | 32 ++++++++++++++++++++++++--------
 meson_options.txt |  5 +++++
 2 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/meson.build b/meson.build
index 2c7018f..2e4b87e 100644
--- a/meson.build
+++ b/meson.build
@@ -92,16 +92,27 @@ if os_backend == 'linux'
     cdata.set10('HAVE_IDEVICE', true)
   endif
 
+  init_system = get_option('init_system')
+  udev_required = init_system == 'systemd'
+
   udevrulesdir = get_option('udevrulesdir')
   if udevrulesdir == 'auto'
-    udev_dep = dependency('udev', required: true)
-    udevrulesdir = udev_dep.get_variable(pkgconfig: 'udev_dir') / 'rules.d'
+    udev_dep = dependency('udev', required: udev_required)
+    if udev_dep.found()
+      udevrulesdir = udev_dep.get_variable(pkgconfig: 'udev_dir') / 'rules.d'
+    else
+      udevrulesdir = '/lib/udev/rules.d'
+    endif
   endif
 
   udevhwdbdir = get_option('udevhwdbdir')
   if udevhwdbdir == 'auto'
-    udev_dep = dependency('udev', required: true)
-    udevhwdbdir = udev_dep.get_variable(pkgconfig: 'udev_dir') / 'hwdb.d'
+    udev_dep = dependency('udev', required: udev_required)
+    if udev_dep.found()
+      udevhwdbdir = udev_dep.get_variable(pkgconfig: 'udev_dir') / 'hwdb.d'
+    else
+      udevhwdbdir = '/lib/udev/hwdb.d'
+    endif
   endif
 endif
 
@@ -116,10 +127,15 @@ if statedir == ''
 endif
 
 dbusdir = get_option('datadir') / 'dbus-1'
-systemdsystemunitdir = get_option('systemdsystemunitdir')
-if systemdsystemunitdir == ''
-    systemd_dep = dependency('systemd')
-    systemdsystemunitdir = systemd_dep.get_variable(pkgconfig: 'systemdsystemunitdir')
+init_system = get_option('init_system')
+if init_system == 'systemd'
+  systemdsystemunitdir = get_option('systemdsystemunitdir')
+  if systemdsystemunitdir == ''
+      systemd_dep = dependency('systemd')
+      systemdsystemunitdir = systemd_dep.get_variable(pkgconfig: 'systemdsystemunitdir')
+  endif
+else
+  systemdsystemunitdir = ''
 endif
 
 datadir = get_option('datadir')
diff --git a/meson_options.txt b/meson_options.txt
index 7220d2f..304b60b 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -48,3 +48,8 @@ option('installed_tests',
        type : 'boolean',
        value : true,
        description : 'Install integration tests')
+option('init_system',
+       type: 'combo',
+       choices: ['systemd', 'other'],
+       value: 'systemd',
+       description: 'Select init system')