update:
Still encountering aligment problem (maybe due to eigen aligment?)
1>objToEggConverter.cxx
1>eggToDXFLayer.cxx
1>eggToObjConverter.cxx
1>c:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\vector(717) : error C2719: '_Val': formal parameter with __declspec(align('16')) won't be aligned
1> c:\users\jc\desktop\panda_build_bot\source maj\panda3d\built\include\pvector.h(39) : see reference to class template instantiation 'std::vector<_Ty,_Ax>' being compiled
1> with
1> [
1> _Ty=LVecBase4,
1> _Ax=pallocator_array<LVecBase4>
1> ]
1> c:\users\jc\desktop\panda_build_bot\source maj\panda3d\pandatool\src\objegg\objToEggConverter.h(80) : see reference to class template instantiation 'pvector<Type>' being compiled
1> with
1> [
1> Type=LVecBase4
1> ]
1>pandatool/src/objegg/objToEggConverter.cxx(739) : warning C4018: '>' : signed/unsigned mismatch
1>The following command returned a non-zero value: cl /wd4996 /wd4275 /wd4267 /wd4101 /wd4273 /DWINVER=0x601 /Fobuilt/tmp/p3objegg_objToEggConverter.obj /nologo /c /arch:SSE2 /Ipandatool/src/objegg /Ibuilt/tmp /Ibuilt/include /Ithirdparty/win-python/include /Ithirdparty/win-libs-vc9/eigen\include /DMAKEPANDA= /MD /Zi /O2 /Ob2 /Oi /Ot /fp:fast /DFORCE_INLINING /Fdbuilt/tmp/p3objegg_objToEggConverter.pdb /EHa /Zm300 /DWIN32_VC /DWIN32 /W3 pandatool/src/objegg/objToEggConverter.cxx
1>Storing dependency cache.
1>Elapsed Time: 57 sec
1>Build process aborting.
1>Build terminated.
1>Build log was saved at "file://c:\Users\jc\Desktop\PANDA_BUILD_BOT\Source MAJ\panda3d\built\BuildLog.htm"
1>makepanda - 1 error(s), 1 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========