--- /dev/null
+#include <tools/ccanlint/ccanlint.h>
+#include <ccan/foreach/foreach.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 <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include <ccan/str_talloc/str_talloc.h>
+
+static void check_license_file_compat(struct manifest *m,
+ bool keep,
+ unsigned int *timeleft,
+ struct score *score)
+{
+ struct list_head *list;
+
+ /* FIXME: Ignore unknown licenses for now. */
+ if (m->license == LICENSE_UNKNOWN) {
+ score->pass = true;
+ score->score = score->total = 0;
+ return 0;
+ }
+
+ foreach_ptr(list, &m->c_files, &m->h_files) {
+ struct ccan_file *f;
+
+ list_for_each(list, f, list) {
+ enum license l;
+
+ /* Check they don't have boilerplate for incompatible
+ * license! */
+ for (l = 0; l < LICENSE_UNKNOWN; l++) {
+ if (!find_boilerplate(f, l))
+ continue;
+ if (license_compatible[m->license][l])
+ break;
+ score_file_error(score, f, 0,
+ "Found boilerplate for license '%s' which is incompatible with '%s'",
+ licenses[l].name,
+ licenses[m->license].name);
+ break;
+ }
+ }
+ }
+
+ if (list_empty(&score->per_file_errors)) {
+ score->pass = true;
+ score->score = score->total;
+ }
+}
+
+struct ccanlint license_file_compat = {
+ .key = "license_file_compat",
+ .name = "Source files don't contain incompatible licenses",
+ .check = check_license_file_compat,
+ .needs = "license_exists"
+};
+REGISTER_TEST(license_file_compat);