+/* Actual compiler and cflags (defaults to CCAN_COMPILER and CCAN_CFLAGS). */
+extern const char *compiler, *cflags;
+
+/* This compiles up the _info file into a temporary. */
+char *compile_info(const void *ctx, const char *dir);
+
+/* This actually compiles and runs the info file to get dependencies. */
+char **get_deps(const void *ctx, const char *dir, const char *style,
+ bool recurse,
+ char *(*get_info)(const void *ctx, const char *dir));
+
+/* This is safer: just looks for ccan/ strings in info */
+char **get_safe_ccan_deps(const void *ctx, const char *dir, const char *style,
+ bool recurse);
+
+/* This also needs to compile the info file:
+ * style == NULL: don't recurse.
+ * style == depends: recurse dependencies.
+ * style == testdepends: recurse testdepends and depends.
+ */
+char **get_libs(const void *ctx, const char *dir, const char *style,
+ char *(*get_info)(const void *ctx, const char *dir));
+
+char **get_cflags(const void *ctx, const char *dir,
+ char *(*get_info)(const void *ctx, const char *dir));
+
+/* From tools.c */
+/* If set, print all commands run, all output they give and exit status. */
+extern bool tools_verbose;
+bool PRINTF_FMT(4,5) run_command(const void *ctx,
+ unsigned int *time_ms,
+ char **output,
+ const char *fmt, ...);
+char *run_with_timeout(const void *ctx, const char *cmd,
+ bool *ok, unsigned *timeout_ms);
+const char *temp_dir(void);
+void keep_temp_dir(void);
+bool move_file(const char *oldname, const char *newname);