http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50348
vincenzo Innocente <vincenzo.innocente at cern dot ch> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vincenzo.innocente at cern
| |dot ch
--- Comment #3 from vincenzo Innocente <vincenzo.innocente at cern dot ch>
2011-09-22 11:05:21 UTC ---
I did a small test removing the visibily just in stl_vector.h
grep namespace
/afs/cern.ch/user/i/innocent/w2/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../include/c++/4.7.0/bits/stl_vector.h
namespace std /* _GLIBCXX_VISIBILITY(default) */
and got
++ -fvisibility=hidden -fvisibility-inlines-hidden -fPIC bha.cc -Wall -shared
-o libx.so
[vinavx0] ~/public/ctest $ readelf -sW libx.so | grep -v UND | sed 's/.local/
.local/g' | c++filt
Symbol table '.dynsym' contains 14 entries:
Num: Value Size Type Bind Vis Ndx Name
2: 0000000000000540 0 FUNC GLOBAL DEFAULT 9 _init
3: 0000000000000758 0 FUNC GLOBAL DEFAULT 12 _fini
6: 000000000000066c 30 FUNC GLOBAL DEFAULT 11 bar()
7: 00000000000006fc 26 FUNC WEAK DEFAULT 11
std::allocator<X>::allocator()
8: 00000000000006fc 26 FUNC WEAK DEFAULT 11
std::allocator<X>::allocator()
9: 0000000000000716 10 FUNC WEAK DEFAULT 11
__gnu_cxx::new_allocator<X>::new_allocator()
10: 0000000000000716 10 FUNC WEAK DEFAULT 11
__gnu_cxx::new_allocator<X>::new_allocator()
11: 0000000000001ae8 0 NOTYPE GLOBAL DEFAULT ABS _edata
12: 0000000000001ae8 0 NOTYPE GLOBAL DEFAULT ABS __bss_start
13: 0000000000001af8 0 NOTYPE GLOBAL DEFAULT ABS _end
Symbol table '.symtab' contains 39 entries:
Num: Value Size Type Bind Vis Ndx Name
1: 00000000000005a0 0 FUNC LOCAL DEFAULT 11 call_gmon_start
2: 0000000000000000 0 FILE LOCAL DEFAULT ABS crtstuff.c
3: 0000000000001ac0 0 OBJECT LOCAL DEFAULT 19 __CTOR_LIST__
4: 0000000000001ad0 0 OBJECT LOCAL DEFAULT 20 __DTOR_LIST__
5: 0000000000001ae0 0 OBJECT LOCAL DEFAULT 21 __JCR_LIST__
6: 00000000000005c0 0 FUNC LOCAL DEFAULT 11
__do_global_dtors_aux
7: 0000000000001ae8 1 OBJECT LOCAL DEFAULT 22 completed.5901
8: 0000000000001af0 8 OBJECT LOCAL DEFAULT 22 dtor_idx.5903
9: 0000000000000640 0 FUNC LOCAL DEFAULT 11 frame_dummy
10: 0000000000000000 0 FILE LOCAL DEFAULT ABS bha.cc
11: 0000000000000000 0 FILE LOCAL DEFAULT ABS crtstuff.c
12: 0000000000001ac8 0 OBJECT LOCAL DEFAULT 19 __CTOR_END__
13: 0000000000000840 0 OBJECT LOCAL DEFAULT 13 __FRAME_END__
14: 0000000000001ae0 0 OBJECT LOCAL DEFAULT 21 __JCR_END__
15: 0000000000000720 0 FUNC LOCAL DEFAULT 11
__do_global_ctors_aux
16: 0000000000001ab8 0 OBJECT LOCAL HIDDEN 18 __dso_handle
17: 000000000000068a 26 FUNC LOCAL HIDDEN 11 std::vector<X,
std::allocator<X> >::vector()
18: 000000000000068a 26 FUNC LOCAL HIDDEN 11 std::vector<X,
std::allocator<X> >::vector()
19: 00000000000006a4 26 FUNC LOCAL HIDDEN 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_base()
20: 00000000000006a4 26 FUNC LOCAL HIDDEN 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_base()
21: 00000000000006be 61 FUNC LOCAL HIDDEN 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl()
22: 00000000000006be 61 FUNC LOCAL HIDDEN 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl()
23: 0000000000001ad8 0 OBJECT LOCAL HIDDEN 20 __DTOR_END__
24: 0000000000001880 496 OBJECT LOCAL HIDDEN 15 _DYNAMIC
25: 0000000000001a88 48 OBJECT LOCAL HIDDEN 17
_GLOBAL_OFFSET_TABLE_
27: 0000000000000540 0 FUNC GLOBAL DEFAULT 9 _init
28: 0000000000000758 0 FUNC GLOBAL DEFAULT 12 _fini
31: 000000000000066c 30 FUNC GLOBAL DEFAULT 11 bar()
32: 00000000000006fc 26 FUNC WEAK DEFAULT 11
std::allocator<X>::allocator()
33: 00000000000006fc 26 FUNC WEAK DEFAULT 11
std::allocator<X>::allocator()
34: 0000000000000716 10 FUNC WEAK DEFAULT 11
__gnu_cxx::new_allocator<X>::new_allocator()
35: 0000000000000716 10 FUNC WEAK DEFAULT 11
__gnu_cxx::new_allocator<X>::new_allocator()
36: 0000000000001ae8 0 NOTYPE GLOBAL DEFAULT ABS _edata
37: 0000000000001ae8 0 NOTYPE GLOBAL DEFAULT ABS __bss_start
38: 0000000000001af8 0 NOTYPE GLOBAL DEFAULT ABS _end
if I add -flto visibility of the "local symbols is turned again to DEFAULT, not
sure if relevant though
g++ -fvisibility=hidden -fvisibility-inlines-hidden -fPIC bha.cc -Wall -shared
-o libx.so -flto
[vinavx0] ~/public/ctest $ readelf -sW libx.so | grep -v UND | sed 's/.local/
.local/g' | c++filt
Symbol table '.dynsym' contains 10 entries:
Num: Value Size Type Bind Vis Ndx Name
2: 0000000000000430 0 FUNC GLOBAL DEFAULT 9 _init
3: 0000000000000628 0 FUNC GLOBAL DEFAULT 12 _fini
6: 000000000000053c 30 FUNC GLOBAL DEFAULT 11 bar()
7: 00000000000019a8 0 NOTYPE GLOBAL DEFAULT ABS _edata
8: 00000000000019a8 0 NOTYPE GLOBAL DEFAULT ABS __bss_start
9: 00000000000019b8 0 NOTYPE GLOBAL DEFAULT ABS _end
Symbol table '.symtab' contains 36 entries:
Num: Value Size Type Bind Vis Ndx Name
1: 0000000000000470 0 FUNC LOCAL DEFAULT 11 call_gmon_start
2: 0000000000000000 0 FILE LOCAL DEFAULT ABS crtstuff.c
3: 0000000000001980 0 OBJECT LOCAL DEFAULT 19 __CTOR_LIST__
4: 0000000000001990 0 OBJECT LOCAL DEFAULT 20 __DTOR_LIST__
5: 00000000000019a0 0 OBJECT LOCAL DEFAULT 21 __JCR_LIST__
6: 0000000000000490 0 FUNC LOCAL DEFAULT 11
__do_global_dtors_aux
7: 00000000000019a8 1 OBJECT LOCAL DEFAULT 22 completed.5901
8: 00000000000019b0 8 OBJECT LOCAL DEFAULT 22 dtor_idx.5903
9: 0000000000000510 0 FUNC LOCAL DEFAULT 11 frame_dummy
10: 0000000000000000 0 FILE LOCAL DEFAULT ABS ccT50cVU.ltrans0.o
11: 000000000000055a 26 FUNC LOCAL DEFAULT 11 std::vector<X,
std::allocator<X> >::vector() .local.0.2256
12: 000000000000055a 26 FUNC LOCAL DEFAULT 11 std::vector<X,
std::allocator<X> >::vector() .local.1.2253
13: 0000000000000574 26 FUNC LOCAL DEFAULT 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_base() .local.3.2259
14: 000000000000058e 61 FUNC LOCAL DEFAULT 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl() .local.4.2265
15: 000000000000058e 61 FUNC LOCAL DEFAULT 11 std::_Vector_base<X,
std::allocator<X> >::_Vector_impl::_Vector_impl() .local.5.2262
16: 00000000000005cc 26 FUNC LOCAL DEFAULT 11
std::allocator<X>::allocator() .local.7.2268
17: 00000000000005e6 10 FUNC LOCAL DEFAULT 11
__gnu_cxx::new_allocator<X>::new_allocator() .local.9.2272
18: 0000000000000000 0 FILE LOCAL DEFAULT ABS crtstuff.c
19: 0000000000001988 0 OBJECT LOCAL DEFAULT 19 __CTOR_END__
20: 0000000000000710 0 OBJECT LOCAL DEFAULT 13 __FRAME_END__
21: 00000000000019a0 0 OBJECT LOCAL DEFAULT 21 __JCR_END__
22: 00000000000005f0 0 FUNC LOCAL DEFAULT 11
__do_global_ctors_aux
23: 0000000000001978 0 OBJECT LOCAL HIDDEN 18 __dso_handle
24: 0000000000001998 0 OBJECT LOCAL HIDDEN 20 __DTOR_END__
25: 0000000000001750 496 OBJECT LOCAL HIDDEN 15 _DYNAMIC
26: 0000000000001958 32 OBJECT LOCAL HIDDEN 17
_GLOBAL_OFFSET_TABLE_
28: 0000000000000430 0 FUNC GLOBAL DEFAULT 9 _init
29: 0000000000000628 0 FUNC GLOBAL DEFAULT 12 _fini
32: 000000000000053c 30 FUNC GLOBAL DEFAULT 11 bar()
33: 00000000000019a8 0 NOTYPE GLOBAL DEFAULT ABS _edata
34: 00000000000019a8 0 NOTYPE GLOBAL DEFAULT ABS __bss_start
35: 00000000000019b8 0 NOTYPE GLOBAL DEFAULT ABS _end
I think that, unless not imposed by the standard (why??) the visibility of
"namespace std" SHALL NOT BE forced to default
