Strange error when using included Object

[Mike Rollins]

Whenever I attempt to create an object from an included file (here, it's 
called "TokenStack") I get the following error:

/tmp/ccup0g6N.o:  In function '__static_initialization_and_destruction_0': 
/.../parser.y:24:  undefined reference to 
'TokenStack::TokenStack[in-charge]()'

I'm using Bison 1.875a and I'm compiling with the following options:

g++ -Wno-deprectation y.tab.c lex.yy.c -lm -ly -g -o parser

Is this a problem with bison, or something with g++?

Thanks,

Mike