-char *compile_object(const void *ctx, const char *cfile, char **errmsg);
-/* Compile and link single C file, with object files, libs, etc. */
-char *compile_and_link(const void *ctx, const char *cfile, const char *objs,
- const char *extra_cflags, const char *libs,
- char **errmsg);
+char *compile_object(const void *ctx, const char *cfile, const char *ccandir,
+ const char *extra_cflags,
+ const char *outfile);
+/* Compile and link single C file, with object files, libs, etc. NULL on
+ * success, error output on fail. */
+char *compile_and_link(const void *ctx, const char *cfile, const char *ccandir,
+ const char *objs, const char *extra_cflags,
+ const char *libs, const char *outfile);
+
+/* If in_pwd is false, return a file int temp_dir, otherwise a local file. */
+char *maybe_temp_file(const void *ctx, const char *extension, bool in_pwd,
+ const char *srcname);
+
+/* Default wait for run_command. Should never time out. */
+extern const unsigned int default_timeout_ms;
+