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diff --git a/gcc/gcc.h b/gcc/gcc.h
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+++ b/gcc/gcc.h
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+/* Header file for modules that link with gcc.c
+   Copyright (C) 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.  */
+
+#ifndef GCC_GCC_H
+#define GCC_GCC_H
+
+#include "version.h"
+
+/* The mapping of a spec function name to the C function that
+   implements it.  */
+struct spec_function
+{
+  const char *name;
+  const char *(*func) (int, const char **);
+};
+
+/* This defines which switch letters take arguments.  */
+
+#define DEFAULT_SWITCH_TAKES_ARG(CHAR) \
+  ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \
+   || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \
+   || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x' \
+   || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V' \
+   || (CHAR) == 'B' || (CHAR) == 'b')
+
+/* This defines which multi-letter switches take arguments.  */
+
+#define DEFAULT_WORD_SWITCH_TAKES_ARG(STR)		\
+ (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext")	\
+  || !strcmp (STR, "Tbss") || !strcmp (STR, "include")	\
+  || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \
+  || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \
+  || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \
+  || !strcmp (STR, "iquote") || !strcmp (STR, "isystem") \
+  || !strcmp (STR, "isysroot") \
+  || !strcmp (STR, "-param") || !strcmp (STR, "specs") \
+  || !strcmp (STR, "MF") || !strcmp (STR, "MT") || !strcmp (STR, "MQ"))
+
+
+/* These are exported by gcc.c.  */
+extern int do_spec (const char *);
+extern void record_temp_file (const char *, int, int);
+extern void fatal (const char *, ...) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
+extern void error (const char *, ...) ATTRIBUTE_PRINTF_1;
+extern void pfatal_with_name (const char *) ATTRIBUTE_NORETURN;
+extern void set_input (const char *);
+
+/* Spec files linked with gcc.c must provide definitions for these.  */
+
+/* Called before processing to change/add/remove arguments.  */
+extern void lang_specific_driver (int *, const char *const **, int *);
+
+/* Called before linking.  Returns 0 on success and -1 on failure.  */
+extern int lang_specific_pre_link (void);
+
+extern int n_infiles;
+
+/* Number of extra output files that lang_specific_pre_link may generate.  */
+extern int lang_specific_extra_outfiles;
+
+/* A vector of corresponding output files is made up later.  */
+
+extern const char **outfiles;
+
+#endif /* ! GCC_GCC_H */