#include <lxc/lxccontainer.h>
-bool __criu_pre_dump(struct lxc_container *c, struct migrate_opts *opts);
-bool __criu_dump(struct lxc_container *c, struct migrate_opts *opts);
-bool __criu_restore(struct lxc_container *c, struct migrate_opts *opts);
-bool __criu_check_feature(uint64_t *features_to_check);
+extern bool __criu_pre_dump(struct lxc_container *c, struct migrate_opts *opts);
+extern bool __criu_dump(struct lxc_container *c, struct migrate_opts *opts);
+extern bool __criu_restore(struct lxc_container *c, struct migrate_opts *opts);
+extern bool __criu_check_feature(uint64_t *features_to_check);
#endif