[Bug preprocessor/106267] #pragma GCC diagnostic ignored not preserved for a -Wattribute-alias warning

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106267

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Simplified test-case:

#define SYSCALL_ALIAS_PROTO(a) \
  _Pragma ("GCC diagnostic push"); \
  _Pragma ("GCC diagnostic ignored \"-Wattribute-alias\""); \
  typeof(a) a __attribute__((alias("sys_ni_posix_timers"))); \
  _Pragma ("GCC diagnostic pop");

int sys_timer_create(int);
void sys_ni_posix_timers(void) {}

SYSCALL_ALIAS_PROTO(sys_timer_create)