On 10/11/20 23:24 +0000, Will Crawford wrote:
On Tue, 10 Nov 2020 at 11:56, Sandro Mani <manisandro@xxxxxxxxx> wrote:
/usr/bin/ld:
CMakeFiles/vtkIOXMLCxxTests.dir/TestXMLHyperTreeGridIO.cxx.o (symbol
from plugin): undefined reference to symbol
'_ZZNSt8__detail18__to_chars_10_implIjEEvPcjT_E8__digits@@LLVM_11'
/usr/bin/ld: /usr/lib64/libLLVM-11.so: error adding symbols: DSO missing
from command line
...
I'm not sure why ld thinks LLVM is involved, vtk does not pull in LLVM
in any way.
I'm pretty much clueless, any ideas?
That looks like the object file requires a symbol from libLLVM, and gcc
isn't linking against it (hence the "DSO missing from command line" part).
That's not a symbol from libLLVM though, it's a static variable inside
a function template defined in the C++ standard library.
See <bits/charconv.h> in the libstdc++ sources:
template<typename _Tp>
void
__to_chars_10_impl(char* __first, unsigned __len, _Tp __val) noexcept
{
static_assert(is_integral<_Tp>::value, "implementation bug");
static_assert(is_unsigned<_Tp>::value, "implementation bug");
static constexpr char __digits[201] =
"0001020304050607080910111213141516171819"
"2021222324252627282930313233343536373839"
"4041424344454647484950515253545556575859"
"6061626364656667686970717273747576777879"
"8081828384858687888990919293949596979899";
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