Build in Win10 VM using conda toolchain

Install miniconda3 (in \conda2-32-bld)

c:\conda2-32-bld\Scripts\activate

conda update -y --all

conda install -y numpy m2w64-toolchain libpython scons svn

cd GSASII\fsource

scons -c

scons install=T

in separate installation use conda install m2w64-gcc-libgfortran. Copy  
from \conda2-32\Library\mingw-w64\bin\*.dll 
into ..\AllBinaries\win_32_p2.7_n1.13\ 
(files libgcc_s_dw2-1.dll, libgmp-10.dll, libquadmath-0.dll, 
libgfortran-3.dll, libgmpxx-4.dll, libwinpthread-1.dll)

Note: see https://anaconda.org/msys2/m2w64-ntldd-git for a utility
that can find dependencies.