https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107701
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2022-11-15
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
D'oh, not sure how I missed this. For some reason, the ios_base::Init __ioinit
initializer disappears when statically linking.
$ nm libstdc++.a | grep _GLOBAL__sub
0000000000000000 t _GLOBAL__sub_I_eh_alloc.cc
0000000000000000 t _GLOBAL__sub_I_bitmap_allocator.cc
0000000000000000 t _GLOBAL__sub_I.00090_ios_init.cc
0000000000000000 t _GLOBAL__sub_I_parallel_settings.cc
0000000000000000 t _GLOBAL__sub_I_cxx11_locale_inst.cc
0000000000000000 t _GLOBAL__sub_I_cxx11_wlocale_inst.cc
0000000000000000 t _GLOBAL__sub_I_future.cc
0000000000000000 t _GLOBAL__sub_I_ios_errcat.cc
0000000000000000 t _GLOBAL__sub_I_locale_inst.cc
0000000000000000 t _GLOBAL__sub_I_system_error.cc
0000000000000000 t _GLOBAL__sub_I_wlocale_inst.cc
0000000000000000 t _GLOBAL__sub_I_memory_resource.cc
$ ./a.out # g++ -static gcc/testsuite/g++.old-deja/g++.benjamin/15071.C
Segmentation fault
$ nm a.out | grep _GLOBAL__sub
0000000000403c00 t _GLOBAL__sub_I_cxx11_locale_inst.cc
0000000000403c80 t _GLOBAL__sub_I_cxx11_wlocale_inst.cc
0000000000403a10 t _GLOBAL__sub_I_eh_alloc.cc
0000000000403d00 t _GLOBAL__sub_I_ios_errcat.cc
0000000000403890 t _GLOBAL__sub_I_locale_inst.cc
0000000000403d20 t _GLOBAL__sub_I_system_error.cc
0000000000403950 t _GLOBAL__sub_I_wlocale_inst.cc
I'm not sure why some global initializers (notably
_GLOBAL__sub_I.00090_ios_init.cc) are missing in the statically linked
executable vs libstdc++.a?
If we define the __ioinit object in e.g. c++11/ios_errcat.cc instead of
c++98/ios_init.cc then the ios_base::Init initializer runs and static linking
works, not sure why that is.
diff --git a/libstdc++-v3/src/c++11/ios_errcat.cc
b/libstdc++-v3/src/c++11/ios_errcat.cc
index 12192447b8b..aa778810009 100644
--- a/libstdc++-v3/src/c++11/ios_errcat.cc
+++ b/libstdc++-v3/src/c++11/ios_errcat.cc
@@ -76,6 +76,8 @@ namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
+#include "../c++98/ios_base_init.h"
+
const error_category&
iostream_category() noexcept
{ return io_category_instance.cat; }
diff --git a/libstdc++-v3/src/c++98/ios_init.cc
b/libstdc++-v3/src/c++98/ios_init.cc
index 4016fcab785..1b5132f1c2d 100644
--- a/libstdc++-v3/src/c++98/ios_init.cc
+++ b/libstdc++-v3/src/c++98/ios_init.cc
@@ -75,8 +75,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
extern wostream wclog;
#endif
-#include "ios_base_init.h"
-
ios_base::Init::Init()
{
if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 1) == 0)
