[Bug middle-end/30700] New: [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[Bug middle-end/30700] New: [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[tbm at cyrius dot com]

PR27657 addressed a similar problem but this one is slightly different and
remains unsolved:

(sid)1556:tbm@em64t: ~/src/a] cat test.c
static void sand_window_create_shape (int test) {}
static void (* const b) (int test) = sand_window_create_shape;

(sid)1557:tbm@em64t: ~/src/a] cat main.c
int main() {
}
(sid)1558:tbm@em64t: ~/src/a] make
/usr/lib/gcc-snapshot/bin/gcc -c -o main.o main.c
/usr/lib/gcc-snapshot/bin/gcc -c -g -O -o test.o test.c
/usr/lib/gcc-snapshot/bin/gcc main.o test.o
test.o:(.debug_info+0x49): undefined reference to `sand_window_create_shape'
collect2: ld returned 1 exit status
make: *** [all] Error 1


-- 
           Summary: [4.2 Regression] YA bogus undefined reference error to
                    static func with -g and -O
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2007-02-04 18:02 -------
Index: dwarf2out.c
===================================================================
*** dwarf2out.c (revision 121576)
--- dwarf2out.c (working copy)
*************** reference_to_unused (tree * tp, int * wa
*** 10007,10012 ****
--- 10007,10018 ----
        if (!node->needed)
        return *tp;
      }
+   else if (DECL_P (*tp) && TREE_CODE (*tp) == FUNCTION_DECL)
+     {
+       struct cgraph_node *node = cgraph_node (*tp);
+       if (!node->needed)
+         return *tp;
+     }

    return NULL_TREE;
  }

honza - does this look sane and can we maybe do this whole function in
graph ways?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-02-04 18:02:36
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2/4.3 Regression] YA bogus undefined reference error to static func with -g and -O

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2/4.3 Regression] YA bogus undefined reference error to static func with -g and -O

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-04-04 12:46 -------
Fixed on the mainline by

Author: hubicka
Date: Fri Mar 30 09:03:55 2007
New Revision: 123358

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=123358
Log:
        PR middle-end/PR30700
        * dwarf2out.c (reference_to_unused): Ask cgraph for functions 
        availablility; add more sanity checking; ask varpool only about
        VAR_DECL.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|4.1.1 4.1.2                 |4.1.1 4.1.2 4.3.0
            Summary|[4.2/4.3 Regression] YA     |[4.2 Regression] YA bogus
                   |bogus undefined reference   |undefined reference error to
                   |error to static func with -g|static func with -g and -O
                   |and -O                      |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[howarth at nitro dot med dot uc dot edu]

------- Comment #3 from howarth at nitro dot med dot uc dot edu  2007-04-11 15:05 -------
I'm puzzled why the fix for this PR was checked into mainline instead of gcc
4.2 branch since only gcc 4.2 is marked as known to fail.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[tbm at cyrius dot com]

------- Comment #4 from tbm at cyrius dot com  2007-04-12 07:24 -------
If you click on "View Bug Activity" you'll see that the bug used to be marked
as 4.2/4.3.  Richi changed it to 4.2 only when the patch got committed to
mainline.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[howarth at nitro dot med dot uc dot edu]

------- Comment #5 from howarth at nitro dot med dot uc dot edu  2007-04-12 17:58 -------
Does that mean that the patch for mainline wouldn't work on gcc 4.2 branch or
that the patch just hasn't been applied to gcc 4.2 branch yet?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2007-04-12 22:41 -------
The latter.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[hubicka at gcc dot gnu dot org]

------- Comment #7 from hubicka at gcc dot gnu dot org  2007-04-17 19:02 -------
Subject: Bug 30700

Author: hubicka
Date: Tue Apr 17 19:02:09 2007
New Revision: 123922

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=123922
Log:
        PR middle-end/30700
        * dwarf2out.c (reference_to_unused): Ask cgraph for functions
        availablility; add more sanity checking; ask varpool only about
        VAR_DECL.

Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/dwarf2out.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700

[Bug middle-end/30700] [4.2 Regression] YA bogus undefined reference error to static func with -g and -O

[hubicka at gcc dot gnu dot org]

------- Comment #8 from hubicka at gcc dot gnu dot org  2007-04-17 19:04 -------
Fixed.


-- 

hubicka at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30700