[Bug c/44438] New: ISO C99 6.7.4p3 not obeyed in C99 mode

[Bug c/44438] New: ISO C99 6.7.4p3 not obeyed in C99 mode

[nickc at redhat dot com]

Section 6.7.4 paragraph 3 of the ISO C99 standard states that:

    An inline definition of a function with external
    linkage ... shall not contain a reference to an identifier with
    internal linkage.

GCC has code to check for this condition, but it does not work in C99 mode.

Reproduce by:

  % cat iso-c99-test.c
  static int a = 7;
  extern inline int foo (void) { return a; }
  int main (void) { return foo (); }

  % gcc -c iso-c99-test.c
  iso-c99-test.c:2:39: warning: 'a' is static but used in inline function 'foo'
which is not static [enabled by default]

  % gcc -c -std=c99 iso-c99-test.c
  %


-- 
           Summary: ISO C99 6.7.4p3 not obeyed in C99 mode
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nickc at redhat dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44438

[Bug c/44438] ISO C99 6.7.4p3 not obeyed in C99 mode

[jsm28 at gcc dot gnu dot org]

------- Comment #1 from jsm28 at gcc dot gnu dot org  2010-06-07 09:54 -------
That's not an "inline definition", so that constraint does not apply.

    If all of the file scope declarations for a function in a translation
    unit include the inline function specifier without extern, then the
    definition in that translation unit is an inline definition.

(6.7.4#6)


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44438