--- /dev/null
+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include <ctype.h>
+
+static const char *can_build(struct manifest *m)
+{
+ if (safe_mode)
+ return "Safe mode enabled";
+ return NULL;
+}
+
+static char *obj_list(const struct manifest *m)
+{
+ char *list = talloc_strdup(m, "");
+ struct ccan_file *i;
+
+ /* Objects from all the C files. */
+ list_for_each(&m->c_files, i, list)
+ list = talloc_asprintf_append(list, "%s ", i->compiled);
+
+ return list;
+}
+
+static void *do_build(struct manifest *m)
+{
+ char *filename, *err;
+
+ if (list_empty(&m->c_files)) {
+ /* No files? No score, but we "pass". */
+ build.total_score = 0;
+ return NULL;
+ }
+ filename = link_objects(m, obj_list(m), &err);
+ if (filename) {
+ char *realname = talloc_asprintf(m, "../%s.o", m->basename);
+ /* We leave this object file around, all built. */
+ if (rename(filename, realname) != 0)
+ return talloc_asprintf(m, "Failed to rename %s to %s",
+ filename, realname);
+ return NULL;
+ }
+ return err;
+}
+
+static const char *describe_build(struct manifest *m, void *check_result)
+{
+ return talloc_asprintf(check_result,
+ "The object file for the module didn't build:\n"
+ "%s", (char *)check_result);
+}
+
+struct ccanlint build = {
+ .name = "Module can be built",
+ .total_score = 1,
+ .check = do_build,
+ .describe = describe_build,
+ .can_run = can_build,
+};
+
+REGISTER_TEST(build, &depends_built, NULL);