http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55800
Bug #: 55800
Summary: Link failure with thread_local in unnamed namespace
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: vlu...@gmx.de
Considering this snippet:
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namespace {
struct X { X() { } };
thread_local X x;
}
int main() { x; }
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Compiling with "c++ -std=c++0x" results in:
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/tmp/cceAUNGB.o: In function `_ZTWN12_GLOBAL__N_11xE':
thread_local.link_failure.with_main.cc:(.text+0x55): undefined reference to
`_ZTHN12_GLOBAL__N_11xE'
collect2: error: ld returned 1 exit status
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Output of c++ -v is:
-----------------------------------------------------------
Using built-in specs.
COLLECT_GCC=/home/lima/vanilla_installs/gcc_and_tools/bin/c++
COLLECT_LTO_WRAPPER=/home/lima/vanilla_installs/gcc_and_tools/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc_svn/configure
--prefix=/home/lima/vanilla_installs/gcc_and_tools --enable-__cxa_atexit
--enable-languages=c,c++ --disable-nls --disable-multilib
Thread model: posix
gcc version 4.8.0 20121223 (experimental) (GCC)
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