extern void _mesa_symbol_table_push_scope(struct _mesa_symbol_table *table);
extern void _mesa_symbol_table_pop_scope(struct _mesa_symbol_table *table);
extern int _mesa_symbol_table_add_symbol(struct _mesa_symbol_table *symtab,
extern void _mesa_symbol_table_push_scope(struct _mesa_symbol_table *table);
extern void _mesa_symbol_table_pop_scope(struct _mesa_symbol_table *table);
extern int _mesa_symbol_table_add_symbol(struct _mesa_symbol_table *symtab,