https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66180
--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
/home/trippels/gcc_6/usr/local/include/c++/6.0.0/bits/stl_pair.h:96:12:
warning: type ‘struct pair’ violates one definition rule [-Wodr]
struct pair
^
/home/trippels/gcc_6/usr/local/include/c++/6.0.0/bits/stl_pair.h:96:12: note: a
different type is defined in another translation unit
struct pair
^
/home/trippels/gcc_6/usr/local/include/c++/6.0.0/bits/stl_pair.h:102:11: note:
the first difference of corresponding definitions is field ‘second’
_T2 second; /// @c second is a copy of the second object
^
/home/trippels/gcc_6/usr/local/include/c++/6.0.0/bits/stl_pair.h:102:11: note:
a field of same name but different type is defined in another translation unit
_T2 second; /// @c second is a copy of the second object
^
/home/trippels/llvm/tools/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp:131:10:
note: type ‘struct GroupInfo’ defined in anonymous namespace can not match type
‘struct GroupInfo’
struct GroupInfo {
^
/home/trippels/llvm/tools/clang/utils/TableGen/ClangSACheckersEmitter.cpp:73:8:
note: the incompatible type defined in anonymous namespace in another
translation unit
struct GroupInfo {
^
This looks like a real LLVM bug. If you do
class bar {
anonymous_namespace_type foo;
}
then definin bar in non-anonymous namespace in more than one unit is ODR
violation (because the type of field FOO is different in each of units). I
think that it is what the warning is about: the instantiation is non-anonymous
of type _T2=GroupInfo that is anonymous.
