GVirConfigDomainTimerPit is correctly define as inheriting from GVirConfigDomainTimer in the G_DEFINE_TYPE macro, but it only embeds GVirConfigObject/GVirConfigObjectClass structs. This is an ABI break as this changes the size of the GVirConfigDomainTimerPit/GVirConfigDomainTimerPitClass structs However, since these structs only have non-public members, users of the library will not be trying to access fields of the struct past the first field (which is the one which changed size). This would also be an issue if anything had subclassed GVirConfigDomainTimerPit, which is unlikely at this point. All in all, it's imo more convenient to silently fix this without an soname bump. I've tested that GNOME Boxes built with an older version of libvirt-gconfig still generates the correct GVirConfigDomainTimerPit elements when using a version of libvirt-gconfig with this patch. --- libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h b/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h index b644c52..7802ac4 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h +++ b/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.h @@ -42,7 +42,7 @@ typedef struct _GVirConfigDomainTimerPitClass GVirConfigDomainTimerPitClass; struct _GVirConfigDomainTimerPit { - GVirConfigObject parent; + GVirConfigDomainTimer parent; GVirConfigDomainTimerPitPrivate *priv; @@ -51,7 +51,7 @@ struct _GVirConfigDomainTimerPit struct _GVirConfigDomainTimerPitClass { - GVirConfigObjectClass parent_class; + GVirConfigDomainTimerClass parent_class; gpointer padding[20]; }; -- 1.8.4.2