According to C standard the size of a structure without fields is not defined (see https://stackoverflow.com/questions/21851930/size-of-empty-structure-in-c-and-c). As use almost use GCC we used these structures having 0-size. This is usually not a problem however can became a problem if 2 side talking a given protocol uses these structures. To avoid such possible mismatch (for instance having one side C and the other C++ which define these structure as having 1 as size) add an empty (0-size array) field. Although a 0-size array is not considered also that portable we use extensively this feature with different compiler never encountering issues. Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx> --- spice/vd_agent.h | 1 + 1 file changed, 1 insertion(+) diff --git a/spice/vd_agent.h b/spice/vd_agent.h index 7109ede..dda7044 100644 --- a/spice/vd_agent.h +++ b/spice/vd_agent.h @@ -234,6 +234,7 @@ typedef struct SPICE_ATTR_PACKED VDAgentClipboardRelease { uint8_t selection; uint8_t __reserved[sizeof(uint32_t) - 1 * sizeof(uint8_t)]; #endif + uint8_t dummy_empty_field[0]; /* C/C++ compatibility */ } VDAgentClipboardRelease; typedef struct SPICE_ATTR_PACKED VDAgentMaxClipboard { -- 2.17.0 _______________________________________________ Spice-devel mailing list Spice-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/spice-devel