--- /dev/null
+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include <ccan/str_talloc/str_talloc.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 <string.h>
+#include <ctype.h>
+
+static void check_hash_if(struct manifest *m,
+ bool keep,
+ unsigned int *timeleft, struct score *score)
+{
+ struct list_head *list;
+ const char *explanation =
+ "\n\t(#if works like #ifdef, but with gcc's -Wundef, we can detect\n"
+ "\tmistyped or unknown configuration options)";
+
+ foreach_ptr(list, &m->c_files, &m->h_files,
+ &m->run_tests, &m->api_tests,
+ &m->compile_ok_tests, &m->compile_fail_tests,
+ &m->other_test_c_files) {
+ struct ccan_file *f;
+
+ list_for_each(list, f, list) {
+ unsigned int i;
+ char **lines = get_ccan_file_lines(f);
+
+ for (i = 0; lines[i]; i++) {
+ const char *line = lines[i];
+ char *sym;
+
+ if (!get_token(&line, "#"))
+ continue;
+ if (!(get_token(&line, "if")
+ && get_token(&line, "defined")
+ && get_token(&line, "("))
+ && !get_token(&line, "ifdef"))
+ continue;
+
+ sym = get_symbol_token(lines, &line);
+ if (!sym || !strstarts(sym, "HAVE_"))
+ continue;
+ score_file_error(score, f, i+1,
+ "%s should be tested with #if"
+ "%s",
+ sym, explanation);
+ explanation = "";
+ }
+ }
+ }
+
+ if (!score->error) {
+ score->pass = true;
+ score->score = score->total;
+ }
+}
+
+struct ccanlint hash_if = {
+ .key = "hash_if",
+ .name = "Features are checked with #if not #ifdef",
+ .check = check_hash_if,
+ .needs = ""
+};
+
+REGISTER_TEST(hash_if);