• Emmanuele Bassi's avatar
    Allow checking for GDK backends · 32298832
    Emmanuele Bassi authored
    Now that a single shared object can contain multiple backends we also
    need to provide a simple way for third party code to verify that the
    copy of GDK they are linking to supports their backend.
    
    The simplest way to verify is an m4 macro, GTK_CHECK_BACKEND(), shipped
    with the gtk+ m4 macros.
    
    The usage is pretty basic:
    
      GTK_CHECK_BACKEND([x11], [gtk_has_x11=yes], [gtk_has_x11=no])
      AM_CONDITIONAL(BUILD_X11_CODE, test "x$gtk_has_x11" = "xno")
    
    https://bugzilla.gnome.org/show_bug.cgi?id=642479
    32298832
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