Silence GLib deprecation warnings for GTK 2 build

GTK 2 headers cause deprecation warnings which we obviously
cannot fix. Setting GLIB_VERSION_MIN_REQUIRED to an older
version than we actually require (2.32 vs. 2.36) avoids this.

See also: Commit f8eece5

Author: radioactiveman

acinclude.m4

@@ -178,8 +178,6 @@ dnl ======================
 PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.36)
 PKG_CHECK_MODULES(GMODULE, gmodule-2.0 >= 2.36)
 
-AC_DEFINE([GLIB_VERSION_MIN_REQUIRED], [GLIB_VERSION_2_36], [target GLib 2.36])
-
 dnl GTK support
 dnl ===========
 
@@ -194,6 +192,7 @@ AC_ARG_ENABLE(gtk2,
 if test $USE_GTK2 = yes ; then
     PKG_CHECK_MODULES(GTK, gtk+-2.0 >= 2.24)
     AC_DEFINE([USE_GTK], [1], [Define if GTK support enabled])
+    AC_DEFINE([GLIB_VERSION_MIN_REQUIRED], [GLIB_VERSION_2_32], [Target GLib 2.32])
 elif test $USE_GTK = yes ; then
     PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.18)
     AC_DEFINE(USE_GTK, 1, [Define if GTK support enabled])

config.h.meson

@@ -22,7 +22,7 @@
 #mesondefine USE_GTK3
 #mesondefine USE_GTK_OR_QT
 
-#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_36
+#mesondefine GLIB_VERSION_MIN_REQUIRED
 
 #mesondefine FILEWRITER_MP3
 #mesondefine FILEWRITER_FLAC

meson.build

@@ -188,7 +188,9 @@ endif
 
 if get_option('gtk')
   conf.set10('USE_GTK', true)
-  if not get_option('gtk2')
+  if get_option('gtk2')
+    conf.set('GLIB_VERSION_MIN_REQUIRED', 'GLIB_VERSION_2_32')
+  else
     conf.set10('USE_GTK3', true)
   endif
 endif