pkgconf_dependency_add
PKGCONF_API pkgconf_dependency_t *pkgconf_dependency_add(pkgconf_client_t *client, pkgconf_list_t *list, const char *package, const char *version, pkgconf_pkg_comparator_t compare, unsigned int flags);
pkgconf_dependency_t *dep = pkgconf_dependency_add(client, &pkg->provides, pkg->id, pkg->version, PKGCONF_CMP_EQUAL, 0);