Add another flag for enabling a bit bridge build

src/common/config/config.h.in

@@ -0,0 +1,30 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+/**
+ * The name of the wine host name, e.g. `yabridge-host.exe` for the regular 64
+ * bit build.
+ */
+constexpr char yabridge_wine_host_name[] = "@host_binary_64bit@";
+
+/**
+ * The name of the 32-bit wine host name, e.g. `yabridge-host-32.exe`.` This is
+ * used as a bitbridge to be able to load legacy 32-bit only Windows plugins
+ * from a 64-bit Linux host.
+ */
+constexpr char yabridge_wine_host_name_32bit[] = "@host_binary_32bit@";

src/common/config/meson.build

@@ -1,3 +1,16 @@
+# Contains constants determined while configuring the build. As an alternative
+# to preprocessor macros.
+config_header = configure_file(
+  input : 'config.h.in',
+  output : 'config.h',
+  configuration : configuration_data(
+    {
+      'host_binary_32bit': host_name_32bit + '.exe',
+      'host_binary_64bit': host_name_64bit + '.exe',
+    }
+  )
+)
+
 # Generate a file containing the last annotated git tag and possibly also the
 # amount of commits since then and the hash of the last commit
 version_header = vcs_tag(