[Bug 755822] New: test_ABI: failed ABI check

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=755822

            Bug ID: 755822
           Summary: test_ABI: failed ABI check
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: vineeth.tm at samsung.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

When running make check got gstreamer, get the below failure...

gstcheck.c:778:F:size check:test_ABI:0: failed ABI check
Running suite(s): LibsABI
sizeof(GstControlPoint) is 40, expected 48


This happens because,
    struct {
      gdouble c1s, c2s, c3s;
    } cubic_mono;
is added in cache union
The union already had a struct cubic with two double values.
So on adding this structure cubic_mono, the size of the union will increase by
only one double value(which is 8).
So the size increase should have been increased from 32-->40. But it was
changed to 48

Another reserved variable     gpointer _gst_reserved[GST_PADDING]; is also
added in the union. But the size of this is less than that of cubic_mono. So it
does not affect the overall size.

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