+static bool depends_on(struct ccanlint *i, struct ccanlint *target)
+{
+ const struct dependent *d;
+
+ if (i == target)
+ return true;
+
+ list_for_each(&i->dependencies, d, node) {
+ if (depends_on(d->dependent, target))
+ return true;
+ }
+ return false;
+}
+
+/* O(N^2), who cares? */
+static void skip_unrelated_tests(struct ccanlint *target)
+{
+ struct ccanlint *i;
+ struct list_head *list;
+
+ foreach_ptr(list, &compulsory_tests, &normal_tests)
+ list_for_each(list, i, list)
+ if (!depends_on(i, target))
+ i->skip = "not relevant to target";
+}
+
+static char *demangle_string(char *string)
+{
+ unsigned int i;
+ const char mapfrom[] = "abfnrtv";
+ const char mapto[] = "\a\b\f\n\r\t\v";
+
+ if (!strchr(string, '"'))
+ return NULL;
+ string = strchr(string, '"') + 1;
+ if (!strrchr(string, '"'))
+ return NULL;
+ *strrchr(string, '"') = '\0';
+
+ for (i = 0; i < strlen(string); i++) {
+ if (string[i] == '\\') {
+ char repl;
+ unsigned len = 0;
+ const char *p = strchr(mapfrom, string[i+1]);
+ if (p) {
+ repl = mapto[p - mapfrom];
+ len = 1;
+ } else if (strlen(string+i+1) >= 3) {
+ if (string[i+1] == 'x') {
+ repl = (string[i+2]-'0')*16
+ + string[i+3]-'0';
+ len = 3;
+ } else if (cisdigit(string[i+1])) {
+ repl = (string[i+2]-'0')*8*8
+ + (string[i+3]-'0')*8
+ + (string[i+4]-'0');
+ len = 3;
+ }
+ }
+ if (len == 0) {
+ repl = string[i+1];
+ len = 1;
+ }
+
+ string[i] = repl;
+ memmove(string + i + 1, string + i + len + 1,
+ strlen(string + i + len + 1) + 1);
+ }
+ }
+
+ return string;
+}
+
+
+static void read_config_header(void)
+{
+ char *fname = talloc_asprintf(NULL, "%s/config.h", ccan_dir);
+ char **lines;
+ unsigned int i;
+
+ config_header = grab_file(NULL, fname, NULL);
+ if (!config_header) {
+ talloc_free(fname);
+ return;
+ }
+
+ lines = strsplit(config_header, config_header, "\n");
+ for (i = 0; i < talloc_array_length(lines) - 1; i++) {
+ char *sym;
+ const char **line = (const char **)&lines[i];
+
+ if (!get_token(line, "#"))
+ continue;
+ if (!get_token(line, "define"))
+ continue;
+ sym = get_symbol_token(lines, line);
+ if (streq(sym, "CCAN_COMPILER") && !compiler) {
+ compiler = demangle_string(lines[i]);
+ if (!compiler)
+ errx(1, "%s:%u:could not parse CCAN_COMPILER",
+ fname, i+1);
+ if (verbose > 1)
+ printf("%s: compiler set to '%s'\n",
+ fname, compiler);
+ } else if (streq(sym, "CCAN_CFLAGS") && !cflags) {
+ cflags = demangle_string(lines[i]);
+ if (!cflags)
+ errx(1, "%s:%u:could not parse CCAN_CFLAGS",
+ fname, i+1);
+ if (verbose > 1)
+ printf("%s: compiler flags set to '%s'\n",
+ fname, cflags);
+ }
+ }
+ if (!compiler)
+ compiler = CCAN_COMPILER;
+ if (!cflags)
+ compiler = CCAN_CFLAGS;
+}
+
+static char *opt_set_const_charp(const char *arg, const char **p)
+{
+ return opt_set_charp(arg, cast_const2(char **, p));
+}
+