http://llvm.org/bugs/show_bug.cgi?id=17058
Bug ID: 17058
Summary: Shared library relocation R_X86_64_TPOFF32 with
__thread
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Driver
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
I don't know if the code is completely correct, but I get the following error
when trying to compile a shared library:
ld: /tmp/tsd-cGUFwW.o: relocation R_X86_64_TPOFF32 against `function.data' can
not be used when making a shared object; recompile with -fPIC
Of course, recompiling with -fPIC gives the same error.
The offending code is:
===========================
int function(void)
{
static __thread int data __attribute__ ((tls_model ("initial-exec")));
return data;
}
===========================
I compile it as a shared library:
clang -nostdlib -shared -fPIC file.c
Adding or removing the -fPIC option does nothing. Compiling as a normal
executable works. The code also works when I remove the final return of the
data, possibly because the variable is optimized away.
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