+/* O(n^2) but n is small. */
+static char **add_deps(char **deps1, char **deps2)
+{
+ unsigned int i, len;
+
+ len = tal_count(deps1);
+
+ for (i = 0; deps2[i]; i++) {
+ if (have_dep(deps1, deps2[i]))
+ continue;
+ tal_resize(&deps1, len + 1);
+ deps1[len-1] = tal_strdup(deps1, deps2[i]);
+ deps1[len++] = NULL;
+ }
+ return deps1;
+}
+
+char **get_cflags(const void *ctx, const char *dir,
+ char *(*get_info)(const void *ctx, const char *dir))
+{
+ char **flags;
+ unsigned int len;
+ flags = get_one_cflags(ctx, dir, get_info);
+ len = tal_count(flags);
+ tal_resize(&flags, len + 1);
+ flags[len] = NULL;
+ return flags;
+}
+
+char **get_libs(const void *ctx, const char *dir, const char *style,
+ char *(*get_info)(const void *ctx, const char *dir))
+{
+ char **deps, **libs;
+ unsigned int i, len;
+
+ libs = get_one_libs(ctx, dir, get_info);
+ len = tal_count(libs);
+
+ if (style) {
+ deps = get_deps(ctx, dir, style, true, get_info);
+ if (streq(style, "testdepends"))
+ deps = add_deps(deps,
+ get_deps(ctx, dir, "depends", true,
+ get_info));
+
+ for (i = 0; deps[i]; i++) {
+ char **newlibs, *subdir;
+ size_t newlen;
+
+ if (!strstarts(deps[i], "ccan/"))
+ continue;
+
+ subdir = path_join(ctx, find_ccan_dir(dir), deps[i]);
+
+ newlibs = get_one_libs(ctx, subdir, get_info);
+ newlen = tal_count(newlibs);
+ tal_resize(&libs, len + newlen);
+ memcpy(&libs[len], newlibs,
+ sizeof(newlibs[0])*newlen);
+ len += newlen;
+ }
+ }
+
+ /* Append NULL entry. */
+ tal_resize(&libs, len + 1);
+ libs[len] = NULL;