--- /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 (list_empty(&m->c_files))
+ return "No C files in module";
+ if (safe_mode)
+ return "Safe mode enabled";
+ return NULL;
+}
+
+static bool compile_obj(struct ccan_file *c_file, char *objfile, char **report)
+{
+ char *contents;
+
+ contents = run_command(objfile, "cc " CFLAGS " -o %s -c %s",
+ objfile, c_file->name);
+ if (contents) {
+ if (*report)
+ *report = talloc_append_string(*report, contents);
+ else
+ *report = contents;
+ return false;
+ }
+ return true;
+}
+
+static int cleanup_obj(char *objfile)
+{
+ unlink(objfile);
+ return 0;
+}
+
+static void *check_objs_build(struct manifest *m)
+{
+ char *report = NULL;
+ struct ccan_file *i;
+
+ /* One point for each obj file. */
+ build_objs.total_score = 0;
+ list_for_each(&m->c_files, i, list)
+ build_objs.total_score++;
+
+ list_for_each(&m->c_files, i, list) {
+ char *objfile = talloc_strdup(m, i->name);
+ objfile[strlen(objfile)-1] = 'o';
+
+ if (compile_obj(i, objfile, &report))
+ talloc_set_destructor(objfile, cleanup_obj);
+ }
+ return report;
+}
+
+static const char *describe_objs_build(struct manifest *m, void *check_result)
+{
+ return talloc_asprintf(check_result,
+ "%s", (char *)check_result);
+}
+
+struct ccanlint build_objs = {
+ .name = "Module object files can be built",
+ .total_score = 1,
+ .check = check_objs_build,
+ .describe = describe_objs_build,
+ .can_run = can_build,
+};
+
+REGISTER_TEST(build_objs, &depends_exist, NULL);