+extern const char *const lang_names[];
+extern const unsigned int cl_lang_count;
+
+#define CL_PARAMS (1 << 17) /* Fake entry. Used to display --param info with --help. */
+#define CL_WARNING (1 << 18) /* Enables an (optional) warning message. */
+#define CL_OPTIMIZATION (1 << 19) /* Enables an (optional) optimization. */
+#define CL_TARGET (1 << 20) /* Target-specific option. */
+#define CL_COMMON (1 << 21) /* Language-independent. */
+
+#define CL_MIN_OPTION_CLASS CL_PARAMS
+#define CL_MAX_OPTION_CLASS CL_COMMON
+
+/* From here on the bits describe attributes of the options.
+ Before this point the bits have described the class of the option.
+ This distinction is important because --help will not list options
+ which only have these higher bits set. */
+
+#define CL_SAVE (1 << 22) /* Target-specific option for attribute. */
+#define CL_DISABLED (1 << 23) /* Disabled in this configuration. */
+#define CL_REPORT (1 << 24) /* Report argument with -fverbose-asm */
+#define CL_JOINED (1 << 25) /* If takes joined argument. */
+#define CL_SEPARATE (1 << 26) /* If takes a separate argument. */
+#define CL_REJECT_NEGATIVE (1 << 27) /* Reject no- form. */
+#define CL_MISSING_OK (1 << 28) /* Missing argument OK (joined). */
+#define CL_UINTEGER (1 << 29) /* Argument is an integer >=0. */
+#define CL_UNDOCUMENTED (1 << 30) /* Do not output with --help. */
+
+/* Input file names. */
+
+extern const char **in_fnames;
+
+/* The count of input filenames. */
+
+extern unsigned num_in_fnames;