lib: add a version header

lib/wp/meson.build

@@ -64,7 +64,7 @@ wp_lib_headers = files(
 )
 
 install_headers(wp_lib_headers,
-  subdir : join_paths('wireplumber-' + wireplumber_api_version, 'wp')
+  install_dir : wireplumber_headers_dir
 )
 
 enums = gnome.mkenums_simple('wpenums',
@@ -72,14 +72,25 @@ enums = gnome.mkenums_simple('wpenums',
   header_prefix: '#include "wp/defs.h"',
   decorator: 'WP_API',
   install_header: true,
-  install_dir: join_paths(get_option('includedir'), 'wireplumber-' + wireplumber_api_version, 'wp'),
+  install_dir: wireplumber_headers_dir,
 )
 wpenums_h = enums[1]
 wpenums_c = enums[0]
 wp_gen_sources = [wpenums_h]
 
+wpversion_data = configuration_data()
+wpversion_data.set('version', meson.project_version())
+wpversion_data.set('api_version', wireplumber_api_version)
+wpversion = configure_file(
+  input : 'wpversion.h.in',
+  output : 'wpversion.h',
+  configuration : wpversion_data,
+  install_dir: wireplumber_headers_dir
+)
+wp_gen_sources += [wpversion]
+
 wp_lib = library('wireplumber-' + wireplumber_api_version,
-  wp_lib_sources, wpenums_c, wpenums_h,
+  wp_lib_sources, wpenums_c, wpenums_h, wpversion,
   c_args : [
     '-D_GNU_SOURCE',
     '-DG_LOG_USE_STRUCTURED',

lib/wp/wp.c

@@ -48,7 +48,7 @@ wp_init (WpInitFlags flags)
     g_log_set_writer_func (wp_log_writer_default, NULL, NULL);
 
   /* a dummy message, to initialize the logging system */
-  wp_info ("WirePlumber initializing");
+  wp_info ("WirePlumber " WIREPLUMBER_VERSION " initializing");
 
   if (flags & WP_INIT_SET_PW_LOG && !g_getenv ("WIREPLUMBER_NO_PW_LOG")) {
     pw_log_level = lvl = wp_spa_log_get_instance ()->level;

lib/wp/wp.h

@@ -38,6 +38,7 @@
 #include "spa-type.h"
 #include "transition.h"
 #include "wpenums.h"
+#include "wpversion.h"
 
 G_BEGIN_DECLS
 

lib/wp/wpversion.h.in

+#define WIREPLUMBER_VERSION "@version@"
+#define WIREPLUMBER_API_VERSION "@api_version@"

meson.build

@@ -12,6 +12,8 @@ project('wireplumber', ['c', 'cpp'],
 wireplumber_api_version = '0.1'
 wireplumber_so_version = '0'
 
+wireplumber_headers_dir = join_paths(get_option('includedir'), 'wireplumber-' + wireplumber_api_version, 'wp')
+
 if get_option('libdir').startswith('/')
   wireplumber_module_dir = join_paths(get_option('libdir'), 'wireplumber-' + wireplumber_api_version)
 else