[Bug c/82508] Possibly false positive implicit-fallthrough warning

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82508

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |egallager at gcc dot gnu.org

--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
$ /usr/local/bin/gcc -c -Wall -Wextra -Wmissing-noreturn -O2 82508.c
82508.c: In function ‘main’:
82508.c:15:4: warning: this statement may fall through
[-Wimplicit-fallthrough=]
    nothing(0);
    ^~~~~~~~~~
82508.c:16:3: note: here
   case 2:
   ^~~~
82508.c: In function ‘nothing’:
82508.c:3:6: warning: function might be candidate for attribute ‘noreturn’
[-Wsuggest-attribute=noreturn]
 void nothing(int rtn_code)
      ^~~~~~~
$

Adding __attribute__((noreturn)) to nothing() leads to the implicit fallthrough
warning being silenced. Does that solve your problem?