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Okay, I included lua.hpp (with 5.1) and got rid of everything except
those last two errors:

% make
g++ -g -Wall -pedantic -L/usr/local/lib -framework Cocoa -o test
main.o qux.o tolua_test.o -ltolua++ -llua -llualib
ld: Undefined symbols:
make: *** [test] Error 1

I did 
`grep _lua_setgcthreshold *` and
`nm *.a | grep _lua_setgc`
in the src directory of the 5.1 distribution and turned up nothing.
Odd. These functions don't look particularly useful to me (says the
programmer who has no idea what they do); I'm open to suggestions on
dodging this problem so I can get my program compiled and running. I'm
also open to suggestions on proper ways to deal with this, of coure.


> > Try adding
> > extern "C" { }

> In 5.1 you can include lua.hpp, which will do this for you. It's in etc/.
> --lhf