http://llvm.org/bugs/show_bug.cgi?id=17964
Bug ID: 17964
Summary: [regression] weak_odr global crashes linker on OS X
Product: libraries
Version: trunk
Hardware: PC
OS: MacOS X
Status: NEW
Severity: release blocker
Priority: P
Component: MC
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
For this module
---
; ModuleID = 'booltest.ll'
@foo = weak_odr thread_local global i8 1
define i32 @main() {
ret i32 0
}
---
running "llc -filetype=obj booltest.ll && clang booltest.o" yields:
---
0 0x10feeb098 __assert_rtn + 144
1 0x10ff78b48 ld::passes::tlvp::doPass(Options const&, ld::Internal&) + 1674
2 0x10feeb416 main + 520
3 0x10fedccd4 start + 52
A linker snapshot was created at:
/tmp/a.out-2013-10-17-022718.ld-snapshot
ld: Assertion failed: (0 && "wrong content type for target in tlv defs"),
function doPass, file /SourceCache/ld64/ld64-136/src/ld/passes/tlvp.cpp, line
278.
clang: error: linker command failed with exit code 1 (use -v to see invocation)
---
(LLVM r94929, ld64-136)
Because of this bug, LDC is still stuck with LLVM 3.2 on OS X (also see bug
15972). It also means that the following is likely not going to work with Clang
either:
---
template <int N> struct Foo { __thread static int a; };
template <int N> __thread int Foo<N>::a = N;
int main() { return Foo<0>::a; }
---
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