meson: move libudev related definitions to src/libudev/meson.build

Also, this makes libudev.so built in build directory.

src/libudev/meson.build

@@ -1,26 +1,43 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
-libudev_sources = files('''
-        libudev.c
-        libudev-device.c
-        libudev-device-internal.h
-        libudev-enumerate.c
-        libudev-hwdb.c
-        libudev-list.c
-        libudev-list-internal.h
-        libudev-monitor.c
-        libudev-queue.c
-        libudev-util.c
-        libudev-util.h
-'''.split())
+libudev_sources = files(
+        'libudev-device.c',
+        'libudev-device-internal.h',
+        'libudev-enumerate.c',
+        'libudev-hwdb.c',
+        'libudev-list.c',
+        'libudev-list-internal.h',
+        'libudev-monitor.c',
+        'libudev-queue.c',
+        'libudev-util.c',
+        'libudev-util.h',
+        'libudev.c',
+        'libudev.h')
 
 ############################################################
 
+libudev_includes = [includes, include_directories('.')]
+
 libudev_sym = files('libudev.sym')
-libudev_sym_path = meson.current_source_dir() + '/libudev.sym'
+libudev_sym_path = join_paths(meson.current_source_dir(), 'libudev.sym')
 
 install_headers('libudev.h')
-libudev_h_path = '@0@/libudev.h'.format(meson.current_source_dir())
+libudev_h_path = join_paths(meson.current_source_dir(), 'libudev.h')
+
+libudev_basic = static_library(
+        'udev-basic',
+        libudev_sources,
+        include_directories : includes,
+        c_args : ['-fvisibility=default'])
+
+libudev_static = static_library(
+        'udev_static',
+        include_directories : includes,
+        link_with : udev_link_with,
+        link_whole : libudev_basic)
+
+static_libudev = get_option('static-libudev')
+static_libudev_pic = static_libudev == 'true' or static_libudev == 'pic'
 
 configure_file(
         input : 'libudev.pc.in',