Hi Don,
Indeed, mpi_cxx is linked against libstdc++, but that has not been a problem
been so far (i.e., with previous versions of clang).
Anyhow, the problem resolved itself after I installed yet another trunk version
(r272243). Apparently it was something related to the version of llvm/clang
that I used before (r271230), but now the problem has disappeared.
Thanks for your input!
Michael
On 06 Jun 2016, at 21:48 , don hinton
mailto:hinto...@gmail.com>> wrote:
Btw, did you build all you dependencies yourself, including libmpi_cxx, and
link them to libc++? Otherwise, I'd bet one of them links to libstdc++.
On Monday, June 6, 2016, don hinton
mailto:hinto...@gmail.com>> wrote:
The only thing odd that I noticed is that although you specifically requested
libc++, the linker tried to link libstdc++ and complained about a symbol it
couldn't find.
The symbol looks like std::string::_Rep::destroy which would be found in the
standard library, so I'd guess some sort of mis-compile. Wish I could be of
more help.
hth...
Don
On Sunday, June 5, 2016, Schlottke-Lakemper, Michael via cfe-users
>
wrote:
*bump*
Is there really nobody here who has a possible answer? If not, do you have any
suggestions where else I could turn to for help? While I’m not an expert on
LLVM/Clang, I’ve done my share of compiling & linking other tools and programs,
so I think that I’ve exhausted all “obvious” explanations (without success).
Yours
Michael
On 31 May 2016, at 15:14 , Michael Schlottke-Lakemper
wrote:
Hi folks,
When trying to link to libLLVMSuport.a in our CFD application, we get the
following error at link time:
/usr/lib64/gcc/x86_64-suse-linux/4.9/../../../../x86_64-suse-linux/bin/ld:
/pds/opt/llvm-20160530-r271230/lib/libLLVMSupport.a(Path.cpp.o): undefined
reference to symbol '_ZNSs4_Rep10_M_destroyERKSaIcE@@GLIBCXX_3.4'
/usr/lib64/libstdc++.so.6: error adding symbols: DSO missing from command line
For the full command & output of ‘—verbose’ see at the end of the mail. This is
not really understandable for me, since the only thing I changed was to switch
to a newer version of clang (before we used r253770, now it is r271230).
Any idea what I’m doing wrong or what I could try to fix this?
P.S.: This is the command we used to compile clang (if it matters):
cmake ../llvm-20160530-r271230-src/
-DCMAKE_INSTALL_PREFIX=/pds/opt/llvm-20160530-r271230
-DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=On -DCMAKE_C_COMPILER=clang
-DCMAKE_CXX_COMPILER=clang++ -DCLANG_DEFAULT_CXX_STDLIB=libc++
P.P.S.: Here is the full command + error output:
/pds/opt/llvm-20160530-r271230/bin/clang++ -O0 -g3 -fno-inline
-DCOMPILER_ATTRIBUTES -std=c++14 -stdlib=libc++ -Wall -Wextra -pedantic
-Wshadow -Wfloat-equal -Wcast-align -Wfloat-equal -Wdisabled-optimization
-Wformat=2 -Winvalid-pch -Winit-self -Wmissing-include-dirs -Wredundant-decls
-Wpacked -Wpointer-arith -Wstack-protector -Wswitch-default -Wwrite-strings
-Wno-type-safety -Werror -Wunused -Wno-infinite-recursion
-Wno-undefined-var-template -L/pds/opt/llvm-20160530-r271230/lib
-Wl,-rpath,/pds/opt/openmpi/lib64:/pds/opt/PointwiseV17.0R2/linux_x86_64/plugins:/pds/opt/intel-16.0.3/lib/intel64/:/pds/opt/llvm-20160530-r271230/lib:/pds/opt/StarCD/lib:/pds/opt/torque/lib
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