[tlbuild] Lua extension modules on Windows

[Philipp Stephani]

Hello,

I'm deeply sorry, but the neverending story continues ... this time on Windows. There the Lua interpreter is contained in the library LUATEX.DLL, but that library doesn't export the Lua runtime functions that are needed for linking against the library. The TeX Live 2010 version exports only the function "dllluatexmain", and the TLcontrib version additionally exports several PNG-related function. But to use extension modules on Windows, all Lua functions should be exported as well. Would that be possible? Even better, could TeX Live provide a stock LUA51.DLL so that extension modules could link against that library instead?

Philipp