Set default module path via compile time option

src/meson.build

@@ -1,3 +1,18 @@
+conf_data = configuration_data()
+module_dir = ''
+if get_option('buildtype') == 'debug'
+    module_dir = join_paths(meson.current_build_dir(), 'servers')
+else
+    module_dir = join_paths(get_option('prefix'), get_option('libdir'), 'vsgi-@0@/servers'.format(api_version))
+endif
+
+conf_data.set('MODULE_DIR', module_dir)
+vsgi_config_name = 'vsgi-config.vala'
+vsgi_config = configure_file(
+    input: vsgi_config_name + '.in',
+    output: vsgi_config_name,
+    configuration: conf_data)
+
 vsgi_sources = files(
     'vsgi.vala',
     'vsgi-application.vala',
@@ -16,16 +31,16 @@ vsgi_sources = files(
     'vsgi-server-module.vala',
     'vsgi-server.vala',
     'vsgi-socket-server.vala',
-    'vsgi-tee-output-stream.vala')
+    'vsgi-tee-output-stream.vala',
+    join_paths(meson.current_build_dir(), vsgi_config_name))
+
+
 vsgi_lib = library('vsgi-' + api_version, vsgi_sources,
                    dependencies: [glib, gobject, gio, gio_unix, gmodule, soup, libsystemd, openssl, posix],
                    vala_header: 'vsgi.h',
                    vala_gir: 'VSGI-@[email protected]'.format(api_version),
-                   build_rpath: join_paths(meson.current_build_dir(), 'servers'),
-                   link_args: ['-Wl,--disable-new-dtags'],
                    install: true,
-                   install_dir: [true, 'include/vsgi-' + api_version, true, true],
-                   install_rpath: join_paths(get_option('prefix'), get_option('libdir'), 'vsgi-@0@/servers'.format(api_version)))
+                   install_dir: [true, 'include/vsgi-' + api_version, true, true])
 
 install_data('vsgi-@[email protected]'.format(api_version),
              install_dir: 'share/vala/vapi')

src/vsgi-config.vala.in

@@ -0,0 +1,20 @@
+/*
+ * This file is part of Valum.
+ *
+ * Valum is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * Valum is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Valum.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace VSGI.Config {
+	public const string MODULE_PATH_FALLBACK = "@MODULE_DIR@";
+}

src/vsgi-server-module.vala

@@ -57,8 +57,17 @@ public class VSGI.ServerModule : TypeModule {
 	}
 
 	construct {
-		// trim the suffix from 'build_path'
-		path = Module.build_path (directory, "vsgi-%s".printf (name))[0:- Module.SUFFIX.length - 1];
+		string module_file_name = "vsgi-%s".printf (name);
+		string module_path = Module.build_path (directory, module_file_name);
+		File module_file = File.new_for_path (module_path);
+
+		if (module_file.query_exists ()) {
+			// trim the suffix from 'build_path'
+			path = module_path[0:- Module.SUFFIX.length - 1];
+		} else {
+			// trim the suffix from 'build_path'
+			path = Module.build_path (Config.MODULE_PATH_FALLBACK, module_file_name)[0:- Module.SUFFIX.length - 1];
+		}
 	}
 
 	public override bool load () {