[Bug c/63453] New: Bogus warning for gnu_inline functions

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63453

            Bug ID: 63453
           Summary: Bogus warning for gnu_inline functions
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org

On
inline int __attribute__ ((gnu_inline)) f (void);
with gnu99/gnu11 we issue:
warning: inline function ‘f’ declared but never defined
even though the function is gnu_inline.  In gnu89 or with -fgnu89-inline we
don't warn for this.