[Bug c++/96117] New: Cannot mix c++11-style and GCC-style attributes

[steveire at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96117

            Bug ID: 96117
           Summary: Cannot mix c++11-style and GCC-style attributes
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: steveire at gmail dot com
  Target Milestone: ---

```
struct __attribute__((visibility("default"))) [[deprecated("a message")]] A1
{

};

struct __attribute__((__deprecated__("a message")))
__attribute__((visibility("default"))) A2
{

};

```

A EXPORT macro containing a GCC-style visibility attribute (generated by CMake)
and another macro containing a c++11-style macro can not be used to decorate a
class.

https://godbolt.org/z/qHxr6s