+char *temp_file(const void *ctx, const char *extension);
+
+/* From compile.c.
+ *
+ * These all compile into a temporary dir, and return the filename.
+ * On failure they return NULL, and errmsg is set to compiler output.
+ */
+/* Compile multiple object files into a single. */
+char *link_objects(const void *ctx, const char *objs, char **errmsg);
+/* Compile a single C file to an object file. Returns errmsg if fails. */
+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);