[llvm-dev] ubsan no longer compiles when libc++ is the default

[Vedant Kumar via llvm-dev]

If we knew the value of SANITIZER_CXX_ABI_LIBRARY, it might be easier to get to the bottom of this. Could you try dumping it out a configure time with a call to message()? Alternatively, you could try reverting r309362 locally to see if that helps.

vedant

> On Aug 2, 2017, at 1:47 AM, İsmail Dönmez <ismail at i10z.com> wrote:
> 
> Hi,
> 
> I see the following variables in the CMakeCache.txt:
> 
> SANITIZER_CXX_ABI:STRING=default
> //STRINGS property for variable: SANITIZER_CXX_ABI
> SANITIZER_CXX_ABI-STRINGS:INTERNAL=none;default;libcxxabi;libstdc++
> 
> Regards,
> ismail
> 
> 
> On Tue, Aug 1, 2017 at 7:32 PM, Vedant Kumar <vsk at apple.com> wrote:
>> 
>>> On Aug 1, 2017, at 7:07 AM, İsmail Dönmez via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>>> 
>>> Hi,
>>> 
>>> Trying to compile llvm with the following configuration on Linux x86-64:
>>> 
>>> cmake -G Ninja -DBUILD_SHARED_LIBS=ON \
>>>                         -DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=gold"
>>> \
>>> -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=gold"\
>>>                         -DCMAKE_BUILD_TYPE=RelWithDebInfo ' \
>>>                         -DCMAKE_C_FLAGS="-O2 -g"  \
>>>                         -DCMAKE_CXX_FLAGS="-O2 -g" \
>>>                         -DENABLE_LINKER_BUILD_ID=ON \
>>>                         -DLLVM_ENABLE_ASSERTIONS=ON \
>>>                         -DLLVM_ENABLE_PIC=ON \
>>>                         -DLLVM_BINUTILS_INCDIR=/usr/include \
>>>                         -DLLVM_TARGETS_TO_BUILD=host \
>>>                         -DLLVM_TARGET_ARCH=host \
>>>                         -DLLVM_LIBDIR_SUFFIX=64 \
>>>                         -DCLANG_DEFAULT_CXX_STDLIB=libc++ \
>>>                         -DLLVM_ENABLE_LIBCXX=ON ..
>>> 
>>> results in the following build error:
>>> 
>>> ../projects/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:233:
>>> error: undefined reference to 'typeinfo for std::type_info'
>>> ../projects/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:233:
>>> error: undefined reference to 'typeinfo for
>>> __cxxabiv1::__class_type_info'
>>> ../projects/compiler-rt/lib/ubsan/ubsan_type_hash_itanium.cc:233:
>>> error: undefined reference to '__dynamic_cast'
>>> [...]
>>> 
>>> Looks like ubsan no longer links to libc++abi ? (I see -lgcc_s -lc
>>> -ldl -lrt -lpthread on the linker line.)
>>> 
>>> This configuration has worked with r308719 so I am guessing this is a
>>> regression.
>> 
>> This might have done it:
>> r309362 Support libc++abi in addition to libstdc++
>> 
>> Can you spot SANITIZER_CXX_ABI_LIBRARY, SANITIZER_CXX_ABI_LIBNAME, SANITIZER_CXX_ABI_INTREE, and SANITIZER_CXX_ABI_SYSTEM in your CMakeCache.txt? If so do they have the right values?
>> 
>> vedant
>> 
>>> 
>>> Regards,
>>> ismail
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>