LDC - DMD sync strategy

[Trass3r via digitalmars-d-ldc]

Tried again with default compiler options but same result for 
tested Release and ReleaseWithDebInfo configs.

cmake.exe -G "Visual Studio 12 Win64" 
-DCMAKE_INSTALL_PREFIX=.../llvm/installed 
-DLLVM_TARGETS_TO_BUILD=X86
-DLLVM_BUILD_TOOLS=OFF -DLLVM_INCLUDE_TESTS=OFF 
-DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_ENABLE_ASSERTIONS=ON 
-DLLVM_APPEND_VC_REV=ON 
-DCMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO="/DEBUG /INCREMENTAL:NO 
/OPT:REF /OPT:ICF" 
-DCMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO="/DEBUG 
/INCREMENTAL:NO /OPT:REF /OPT:ICF" ..

cmake.exe -G "Visual Studio 12 Win64" 
-DCMAKE_INSTALL_PREFIX=.../ldc -DLLVM_ROOT_DIR=.../llvm/installed 
-DLIBCONFIG++_INCLUDE_DIR=../libconfig-1.4.9/lib 
-DLIBCONFIG++_LIBRARY="../libconfig-1.4.9/x64/Release/libconfig++.lib" 
..

Generating src/core/atomic.obj
Assertion failed: List && "Handle list is null?", file 
..\..\..\lib\IR\Value.cpp, line 528
Generating std/algorithm-debug.obj
Assertion failed: !N->getContext().pImpl->MDNodeSet.RemoveNode(N) 
&& "Deleting a non-temporary uniqued node!", file 
..\..\..\lib\IR\Metadata.cpp, line 296