https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43407
--- Comment #3 from Brian Adams <badams at gnarlie dot com> ---
This bug is also in 4.9.0, and applies to /any/ attribute. Assuming a GCC
plugin that defines 'my_attr':
enum class __attribute__((my_attr)) MessageType : uint8_t {}
will generate the warning
Messages.h:37:1: warning: type attributes ignored after type is already
defined [-Wattributes]
As a work around, this code functions as desired:
enum class MessageType : uint8_t __attribute__((my_attr)) {}
Interestingly, putting the attribute *before* the enum keyword generates a
warning and note that are (currently) incorrect, given this bug:
warning: attribute ignored in declaration of ‘enum class MessageType’
[-Wattributes]
__attribute__((my_attr)) enum class MessageType : uint8_t {
^
note: attribute for ‘enum class batsoe::MessageType’ must follow the ‘enum
class’ keyword
