http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55028
Bug #: 55028
Summary: _GLIBCXX_DEBUG is broken when using v7 namespace
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
I've just hit an issue when using _GLIBCXX_DEBUG together with gcc 4.7.2 built
using --enable-symvers=gnu-versioned-namespace flag. The issue is specific to
unordered_mulimap and can be reproduced using the following:
struct MyType
{
};
#if 1
using MyMap = std::multimap<std::string, MyType *>; // works
#else
using MyMap = std::unordered_multimap<std::string, MyType *>; // fails to link
#endif
MyMap m;
m.insert({"blah"}, new MyType});
The latter variant fails to link with the following message:
misc/libmisc.a(statmgr.o): In function
`__gnu_debug::_Safe_unordered_container_base::~_Safe_unordered_container_base()':
statmgr.cc:(.text._ZN11__gnu_debug30_Safe_unordered_container_baseD2Ev[_ZN11__gnu_debug30_Safe_unordered_container_baseD5Ev]+0x15):
undefined reference to
`__gnu_debug::_Safe_unordered_container_base::_M_detach_all()'
The compiler was configured as follows:
Configured with: ../gcc-4.7.2/configure --prefix=/opt/gcc-4.7-v7
--enable-languages=c,c++,lto --with-mpfr=/opt/gcc-4.6-rbt
--with-cloog=/opt/gcc-4.6-rbt --with-mpc=/opt/gcc-4.6-rbt
--with-gmp=/opt/gcc-4.6-rbt --with-system-zlib --disable-multilib --enable-lto
--with-build-config=bootstrap-lto --with-fpmath=sse --enable-build-with-cxx
--enable-gold=yes --enable-cloog-backend=isl --disable-cloog-version-check
--enable-symvers=gnu-versioned-namespace CFLAGS=-O3 CXXFLAGS=-O3
Thread model: posix
gcc version 4.7.2 (GCC)
