extern tree c_omp_check_context_selector (location_t, tree);
extern tree c_omp_get_context_selector (tree, const char *, const char *);
extern void c_omp_mark_declare_variant (location_t, tree, tree);
-extern int c_omp_context_selector_matches (tree);
/* Return next tree in the chain for chain_next walking of tree nodes. */
static inline tree