Linking Release+Asserts Shared Library cygLLVM-3.5.0svn.dll fails

Hi

On a cygwin/win7/x86_64 platform, building LLVM 3.4 fails as

llvm[1]: Linking Release+Asserts Shared Library cygLLVM-3.5.0svn.dll
Cannot export ZGVZN4llvm7hashing6detail18get_execution_seedEvE4seed: symbol
not defined
Cannot export ZN15BaseIndexOffset5matchEN4llvm7SDValueE: symbol not defined
Cannot export ZN16LTOCodeGenerator12setDebugInfoE15lto_debug_model: symbol
not defined
Cannot export ZN16LTOCodeGenerator15compile_to_fileEPPKcbbbRSs: symbol not
defined
Cannot export ZN16LTOCodeGenerator15determineTargetERSs: symbol not defined
Cannot export ZN16LTOCodeGenerator15setCodePICModelE17lto_codegen_model:
symbol not defined
Cannot export
ZN16LTOCodeGenerator16applyRestrictionERN4llvm11GlobalValueERKNS0_8ArrayRefINS0_9StringRefEEERSt6vect
...
configure.log is
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by LLVM configure 3.5.0svn, which was
generated by GNU Autoconf 2.60. Invocation command line was

  $ ../llvm/configure --enable-targets=x86_64 --enable-optimized
--enable-shared=yes --disable-embed-stdcxx

Any idea what could be wrong in building LLVM?

TIA

zos

context
$ uname -a
CYGWIN_NT-6.1 idefix 1.7.28(0.271/5/3) 2014-02-09 21:06 x86_64 Cygwin

$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with:
/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2/configure
--srcdir=/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2
--prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
--libexecdir=/usr/libexec --datadir=/usr/share --localstatedir=/var
--sysconfdir=/etc --libdir=/usr/lib --datarootdir=/usr/share
--docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C
--build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin
--without-libiconv-prefix --without-libintl-prefix --enable-shared
--enable-shared-libgcc --enable-static
--enable-version-specific-runtime-libs --enable-bootstrap
--disable-__cxa_atexit --with-dwarf2 --with-tune=generic
--enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite
--enable-threads=posix --enable-libatomic --enable-libgomp --disable-libitm
--enable-libquadmath --enable-libquadmath-support --enable-libssp
--enable-libada --enable-libgcj-sublibs --disable-java-awt --disable-symvers
--with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as
--with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix
--without-libintl-prefix --with-system-zlib --libexecdir=/usr/lib
Thread model: posix
gcc version 4.8.2 (GCC)