main: Print version in debug output on startup

This will stop needing to ask users that read the README when reporting
bugs but don't include this info.

src/iio-sensor-proxy.c

@@ -7,6 +7,8 @@
  *
  */
 
+#include "config.h"
+
 #include <locale.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -960,8 +962,10 @@ int main (int argc, char **argv)
 		return EXIT_FAILURE;
 	}
 
-	if (verbose)
+	if (verbose) {
 		g_setenv ("G_MESSAGES_DEBUG", "all", TRUE);
+		g_debug ("Starting iio-sensor-proxy version "VERSION);
+	}
 
 	data = g_new0 (SensorData, 1);
 	data->previous_orientation = ORIENTATION_UNDEFINED;

src/meson.build

@@ -1,3 +1,10 @@
+config_h = configuration_data()
+config_h.set_quoted('VERSION', meson.project_version())
+config_h_files = configure_file(
+  output: 'config.h',
+  configuration: config_h
+)
+
 deps = [ gio_dep, gudev_dep, mathlib_dep ]
 
 resources = gnome.compile_resources(
@@ -27,6 +34,7 @@ sources = [
   'accel-attributes.c',
   'utils.c',
   resources,
+  config_h_files,
 ]
 
 executable('iio-sensor-proxy',