Building shared libraries doesn't work properly on Windows

[asylvest]

At least with Visual Studio 2015, the build fails:

[ 4/53] cxxshlib: target\modules\c++\except\source\Context.cpp.1.o target\modules\c++\except\source\Throwable.cpp.1.o target\modules\c++\except\source\Trace.cpp.1.o -> target\modules\c++\except\except-c++.dll target\modules\c++\except\except-c++.lib target\modules\c++\except\except-c++.dll.manifest
Waf: Leaving directory `C:\Users\Adam\Documents\Code\checkout\coda-oss\target'
Build failed
-> missing file: 'C:\\Users\\Adam\\Documents\\Code\\checkout\\coda-oss\\target\\modules\\c++\\except\\except-c++.lib'

It does properly build the DLL but then waf is expecting a .lib file too.

I thought this built ok previously (but then there are declspec issues where we'd need a macro around our class definitions to handle this properly).

Shared libraries work fine on Linux.