[Bug c++/32470] New: fvisibility=hidden without effect in some casses

["gd at spherenet dot de" <gcc-bugzilla at gcc dot gnu dot org>]

Compiling the following code with fvisibility=hidden exports Test::test().
(The used compiler is 4.2.1 20070622. Version 4.2.0 on a i686 gives the same
results).

~$ cat test.cc

#include <streambuf>
class Test
{
  void test();
};
void Test::test() { }

~$ g++ -fvisibility=hidden -fPIC -c -o test.o test.cc
~$ readelf -s test.o
Symbol table '.symtab' contains 12 entries:
 Num:    Value         Size Type    Bind   Vis      Ndx Name
   0: 0000000000000000    0 NOTYPE  LOCAL  DEFAULT  UND 
   1: 0000000000000000    0 FILE    LOCAL  DEFAULT  ABS test.cc
   2: 0000000000000000    0 SECTION LOCAL  DEFAULT    1 
   3: 0000000000000000    0 SECTION LOCAL  DEFAULT    2 
   4: 0000000000000000    0 SECTION LOCAL  DEFAULT    3 
   5: 0000000000000000    0 SECTION LOCAL  DEFAULT    4 
   6: 0000000000000000    0 SECTION LOCAL  DEFAULT    6 
   7: 0000000000000000    0 SECTION LOCAL  DEFAULT    9 
   8: 0000000000000000    0 SECTION LOCAL  DEFAULT    8 
   9: 0000000000000000   10 FUNC    GLOBAL DEFAULT    1 _ZN4Test4testEv
  10: 0000000000000000    0 NOTYPE  GLOBAL DEFAULT  UND __gxx_personality_v0
  11: 0000000000000000    8 OBJECT  WEAK   HIDDEN    6
DW.ref.__gxx_personality_

After removing #include <streambuf> from the testcase, Test::test() is hidden
as expected.

~$ g++ -fvisibility=hidden -fPIC -c -o test.o test.cc
~$ readelf -s test.o
Symbol table '.symtab' contains 12 entries:
 Num:    Value         Size Type    Bind   Vis      Ndx Name
   0: 0000000000000000    0 NOTYPE  LOCAL  DEFAULT  UND 
   1: 0000000000000000    0 FILE    LOCAL  DEFAULT  ABS test.cc
   2: 0000000000000000    0 SECTION LOCAL  DEFAULT    1 
   3: 0000000000000000    0 SECTION LOCAL  DEFAULT    2 
   4: 0000000000000000    0 SECTION LOCAL  DEFAULT    3 
   5: 0000000000000000    0 SECTION LOCAL  DEFAULT    4 
   6: 0000000000000000    0 SECTION LOCAL  DEFAULT    6 
   7: 0000000000000000    0 SECTION LOCAL  DEFAULT    9 
   8: 0000000000000000    0 SECTION LOCAL  DEFAULT    8 
   9: 0000000000000000   10 FUNC    GLOBAL HIDDEN    1 _ZN4Test4testEv
  10: 0000000000000000    0 NOTYPE  GLOBAL DEFAULT  UND __gxx_personality_v0
  11: 0000000000000000    8 OBJECT  WEAK   HIDDEN    6
DW.ref.__gxx_personality_


-- 
           Summary: fvisibility=hidden without effect in some casses
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gd at spherenet dot de
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32470