Add header guard to several header files.

2014-09-19  Kito Cheng  <kito@0xlab.org>

	* except.h: Fix header guard.
	* addresses.h: Add missing header guard.
	* cfghooks.h: Likewise.
	* collect-utils.h: Likewise.
	* collect2-aix.h: Likewise.
	* conditions.h: Likewise.
	* cselib.h: Likewise.
	* dwarf2asm.h: Likewise.
	* graphds.h: Likewise.
	* graphite-scop-detection.h: Likewise.
	* gsyms.h: Likewise.
	* hw-doloop.h: Likewise.
	* incpath.h: Likewise.
	* ipa-inline.h: Likewise.
	* ipa-ref.h: Likewise.
	* ira-int.h: Likewise.
	* ira.h: Likewise.
	* lra-int.h: Likewise.
	* lra.h: Likewise.
	* lto-section-names.h: Likewise.
	* read-md.h: Likewise.
	* reload.h: Likewise.
	* rtl-error.h: Likewise.
	* sdbout.h: Likewise.
	* targhooks.h: Likewise.
	* tree-affine.h: Likewise.
	* xcoff.h: Likewise.
	* xcoffout.h: Likewise.

From-SVN: r215365

29 files changed, 162 insertions, 2 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index de52a05..37749c7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,34 @@
+2014-09-19  Kito Cheng  <kito@0xlab.org>
+
+	* except.h: Fix header guard.
+	* addresses.h: Add missing header guard.
+	* cfghooks.h: Likewise.
+	* collect-utils.h: Likewise.
+	* collect2-aix.h: Likewise.
+	* conditions.h: Likewise.
+	* cselib.h: Likewise.
+	* dwarf2asm.h: Likewise.
+	* graphds.h: Likewise.
+	* graphite-scop-detection.h: Likewise.
+	* gsyms.h: Likewise.
+	* hw-doloop.h: Likewise.
+	* incpath.h: Likewise.
+	* ipa-inline.h: Likewise.
+	* ipa-ref.h: Likewise.
+	* ira-int.h: Likewise.
+	* ira.h: Likewise.
+	* lra-int.h: Likewise.
+	* lra.h: Likewise.
+	* lto-section-names.h: Likewise.
+	* read-md.h: Likewise.
+	* reload.h: Likewise.
+	* rtl-error.h: Likewise.
+	* sdbout.h: Likewise.
+	* targhooks.h: Likewise.
+	* tree-affine.h: Likewise.
+	* xcoff.h: Likewise.
+	* xcoffout.h: Likewise.
+
 2014-09-18  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR debug/63285
diff --git a/gcc/addresses.h b/gcc/addresses.h
index e323b58..3f0089a 100644
--- a/gcc/addresses.h
+++ b/gcc/addresses.h
@@ -21,6 +21,9 @@ along with GCC; see the file COPYING3.  If not see
    MODE_BASE_REG_REG_CLASS, MODE_BASE_REG_CLASS and BASE_REG_CLASS.
    Arguments as for the MODE_CODE_BASE_REG_CLASS macro.  */
 
+#ifndef GCC_ADDRESSES_H
+#define GCC_ADDRESSES_H
+
 static inline enum reg_class
 base_reg_class (enum machine_mode mode ATTRIBUTE_UNUSED,
 		addr_space_t as ATTRIBUTE_UNUSED,
@@ -82,3 +85,5 @@ regno_ok_for_base_p (unsigned regno, enum machine_mode mode, addr_space_t as,
 
   return ok_for_base_p_1 (regno, mode, as, outer_code, index_code);
 }
+
+#endif /* GCC_ADDRESSES_H */
diff --git a/gcc/cfghooks.h b/gcc/cfghooks.h
index 8ff808c..1b8587a 100644
--- a/gcc/cfghooks.h
+++ b/gcc/cfghooks.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_CFGHOOKS_H
+#define GCC_CFGHOOKS_H
+
 /* Only basic-block.h includes this.  */
 
 struct cfg_hooks
@@ -221,3 +224,4 @@ extern void gimple_register_cfg_hooks (void);
 extern struct cfg_hooks get_cfg_hooks (void);
 extern void set_cfg_hooks (struct cfg_hooks);
 
+#endif /* GCC_CFGHOOKS_H */
diff --git a/gcc/collect-utils.h b/gcc/collect-utils.h
index 2989c6b..ba1985e 100644
--- a/gcc/collect-utils.h
+++ b/gcc/collect-utils.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_COLLECT_UTILS_H
+#define GCC_COLLECT_UTILS_H
+
 /* Provided in collect-utils.c.  */
 extern void notice (const char *, ...)
   __attribute__ ((format (printf, 1, 2)));
@@ -42,3 +45,5 @@ extern const char tool_name[];
 /* Called by utils_cleanup.  */
 extern void tool_cleanup (bool);
 extern void maybe_unlink (const char *);
+
+#endif /* GCC_COLLECT_UTILS_H */
diff --git a/gcc/collect2-aix.h b/gcc/collect2-aix.h
index 953b877..40f855e 100644
--- a/gcc/collect2-aix.h
+++ b/gcc/collect2-aix.h
@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_COLLECT2_AIX_H
+#define GCC_COLLECT2_AIX_H
 /* collect2-aix.c requires mmap support.  It should otherwise be
    fairly portable.  */
 #if defined(CROSS_DIRECTORY_STRUCTURE) \
@@ -300,3 +302,5 @@ extern int ldtbread (LDFILE *, long, SYMENT *);
 extern int ldclose (LDFILE *);
 
 #endif
+
+#endif /* GCC_COLLECT2_AIX_H */
diff --git a/gcc/conditions.h b/gcc/conditions.h
index 837fff3..5162957 100644
--- a/gcc/conditions.h
+++ b/gcc/conditions.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_CONDITIONS_H
+#define GCC_CONDITIONS_H
+
 /* None of the things in the files exist if we don't use CC0.  */
 
 #ifdef HAVE_cc0
@@ -115,3 +118,5 @@ extern CC_STATUS cc_status;
   CC_STATUS_MDEP_INIT)
 
 #endif
+
+#endif /* GCC_CONDITIONS_H */
diff --git a/gcc/cselib.h b/gcc/cselib.h
index ecf53e1..205f180 100644
--- a/gcc/cselib.h
+++ b/gcc/cselib.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_CSELIB_H
+#define GCC_CSELIB_H
+
 /* Describe a value.  */
 struct cselib_val {
   /* The hash value.  */
@@ -120,3 +123,5 @@ canonical_cselib_val (cselib_val *val)
   gcc_checking_assert (canonical_cselib_val (canon) == canon);
   return canon;
 }
+
+#endif /* GCC_CSELIB_H */
diff --git a/gcc/dwarf2asm.h b/gcc/dwarf2asm.h
index ca76bf6..1122c85 100644
--- a/gcc/dwarf2asm.h
+++ b/gcc/dwarf2asm.h
@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_DWARF2ASM_H
+#define GCC_DWARF2ASM_H
 
 extern void dw2_assemble_integer (int, rtx);
 
@@ -86,3 +88,5 @@ extern void dw2_asm_output_delta_sleb128 (const char *, const char *,
 					  const char *, ...)
      ATTRIBUTE_NULL_PRINTF_3;
 #endif
+
+#endif /* GCC_DWARF2ASM_H */
diff --git a/gcc/except.h b/gcc/except.h
index 3259151..d01a3a0 100644
--- a/gcc/except.h
+++ b/gcc/except.h
@@ -22,8 +22,7 @@ along with GCC; see the file COPYING3.  If not see
    that the compiler can keep track of where this file is included.  This
    is e.g. used to avoid including this file in front-end specific files.  */
 #ifndef GCC_EXCEPT_H
-#  define GCC_EXCEPT_H
-#endif
+#define GCC_EXCEPT_H
 
 #include "hash-map.h"
 #include "hashtab.h"
@@ -333,3 +332,5 @@ ehr_next (eh_region r, eh_region start)
   for ((R) = (FN)->eh->region_tree; (R) != NULL; (R) = ehr_next (R, NULL))
 
 #define FOR_ALL_EH_REGION(R) FOR_ALL_EH_REGION_FN (R, cfun)
+
+#endif
diff --git a/gcc/graphds.h b/gcc/graphds.h
index 03f969a..fbae09c 100644
--- a/gcc/graphds.h
+++ b/gcc/graphds.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_GRAPHDS_H
+#define GCC_GRAPHDS_H
+
 /* Structure representing edge of a graph.  */
 
 struct graph_edge
@@ -59,3 +62,5 @@ void graphds_domtree (struct graph *, int, int *, int *, int *);
 typedef void (*graphds_edge_callback) (struct graph *, struct graph_edge *);
 void for_each_edge (struct graph *, graphds_edge_callback);
 void free_graph (struct graph *g);
+
+#endif /* GCC_GRAPHDS_H */
diff --git a/gcc/graphite-scop-detection.h b/gcc/graphite-scop-detection.h
index 8ec7fdc..71b8827 100644
--- a/gcc/graphite-scop-detection.h
+++ b/gcc/graphite-scop-detection.h
@@ -19,7 +19,11 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_GRAPHITE_SCOP_DETECTION_H
+#define GCC_GRAPHITE_SCOP_DETECTION_H
 
 extern void build_scops (vec<scop_p> *);
 extern void dot_all_scops (vec<scop_p> );
 extern void dot_scop (scop_p);
+
+#endif /* GCC_GRAPHITE_SCOP_DETECTION_H */
diff --git a/gcc/gsyms.h b/gcc/gsyms.h
index 3547692..3aeb1da 100644
--- a/gcc/gsyms.h
+++ b/gcc/gsyms.h
@@ -18,6 +18,8 @@ along with GCC; see the file COPYING3.  If not see
 
 /* For cross compilation, use the portable definitions from the COFF
    documentation.  */
+#ifndef GCC_GSYMS_H
+#define GCC_GSYMS_H
 
 #define __GNU_SYMS__
 
@@ -102,3 +104,5 @@ enum sdb_masks
 #endif
   N_TSHIFT = 2
 };
+
+#endif /* GCC_GSYMS_H */
diff --git a/gcc/hw-doloop.h b/gcc/hw-doloop.h
index 52b344d..1e2a87f 100644
--- a/gcc/hw-doloop.h
+++ b/gcc/hw-doloop.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_HW_DOLOOP_H
+#define GCC_HW_DOLOOP_H
+
 /* We need to keep a vector of loops */
 typedef struct hwloop_info_d *hwloop_info;
 
@@ -153,3 +156,5 @@ struct hw_doloop_hooks
 };
 
 extern void reorg_loops (bool, struct hw_doloop_hooks *);
+
+#endif /* GCC_HW_DOLOOP_H */
diff --git a/gcc/incpath.h b/gcc/incpath.h
index e86130f..0826d26 100644
--- a/gcc/incpath.h
+++ b/gcc/incpath.h
@@ -15,6 +15,9 @@
    along with this program; see the file COPYING3.  If not see
    <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_INCPATH_H
+#define GCC_INCPATH_H
+
 extern void split_quote_chain (void);
 extern void add_path (char *, int, int, bool);
 extern void register_include_chains (cpp_reader *, const char *,
@@ -32,3 +35,5 @@ struct target_c_incpath_s {
 extern struct target_c_incpath_s target_c_incpath;
 
 enum { QUOTE = 0, BRACKET, SYSTEM, AFTER };
+
+#endif /* GCC_INCPATH_H */
diff --git a/gcc/ipa-inline.h b/gcc/ipa-inline.h
index 8cbb39f..7597323 100644
--- a/gcc/ipa-inline.h
+++ b/gcc/ipa-inline.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_IPA_INLINE_H
+#define GCC_IPA_INLINE_H
+
 #include "ipa-prop.h"
 
 /* Representation of inline parameters that do depend on context function is
@@ -347,3 +350,5 @@ reset_edge_growth_cache (struct cgraph_edge *edge)
       edge_growth_cache[edge->uid] = zero;
     }
 }
+
+#endif /* GCC_IPA_INLINE_H */
diff --git a/gcc/ipa-ref.h b/gcc/ipa-ref.h
index b8b1f9e..6709933 100644
--- a/gcc/ipa-ref.h
+++ b/gcc/ipa-ref.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_IPA_REF_H
+#define GCC_IPA_REF_H
+
 struct cgraph_node;
 class varpool_node;
 class symtab_node;
@@ -127,3 +130,5 @@ public:
      or GGC will try to mark middle of references vectors.  */
   vec<ipa_ref_ptr>  GTY((skip)) referring;
 };
+
+#endif /* GCC_IPA_REF_H */
diff --git a/gcc/ira-int.h b/gcc/ira-int.h
index 1db0641..e3db1c7 100644
--- a/gcc/ira-int.h
+++ b/gcc/ira-int.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_IRA_INT_H
+#define GCC_IRA_INT_H
+
 #include "cfgloop.h"
 #include "ira.h"
 #include "alloc-pool.h"
@@ -1507,3 +1510,5 @@ ira_allocate_and_set_or_copy_costs (int **vec, enum reg_class aclass,
 
 extern rtx ira_create_new_reg (rtx);
 extern int first_moveable_pseudo, last_moveable_pseudo;
+
+#endif /* GCC_IRA_INT_H */
diff --git a/gcc/ira.h b/gcc/ira.h
index 1d1ec65..a3bcbdc 100644
--- a/gcc/ira.h
+++ b/gcc/ira.h
@@ -19,6 +19,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_IRA_H
+#define GCC_IRA_H
+
 /* True when we use LRA instead of reload pass for the current
    function.  */
 extern bool ira_use_lra_p;
@@ -195,3 +198,5 @@ extern bool ira_better_spill_reload_regno_p (int *, int *, rtx, rtx, rtx);
 extern bool ira_bad_reload_regno (int, rtx, rtx);
 
 extern void ira_adjust_equiv_reg_cost (unsigned, int);
+
+#endif /* GCC_IRA_H */
diff --git a/gcc/lra-int.h b/gcc/lra-int.h
index 5afc68c..28903e1 100644
--- a/gcc/lra-int.h
+++ b/gcc/lra-int.h
@@ -18,6 +18,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.	If not see
 <http://www.gnu.org/licenses/>.	 */
 
+#ifndef GCC_LRA_INT_H
+#define GCC_LRA_INT_H
+
 #include "lra.h"
 #include "bitmap.h"
 #include "recog.h"
@@ -501,3 +504,5 @@ lra_assign_reg_val (int from, int to)
   lra_reg_info[to].val = lra_reg_info[from].val;
   lra_reg_info[to].offset = lra_reg_info[from].offset;
 }
+
+#endif /* GCC_LRA_INT_H */
diff --git a/gcc/lra.h b/gcc/lra.h
index 4d67484..fcdea70 100644
--- a/gcc/lra.h
+++ b/gcc/lra.h
@@ -19,6 +19,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.	If not see
 <http://www.gnu.org/licenses/>.	 */
 
+#ifndef GCC_LRA_H
+#define GCC_LRA_H
+
 extern bool lra_simple_p;
 
 /* Return the allocno reg class of REGNO.  If it is a reload pseudo,
@@ -37,3 +40,5 @@ extern rtx lra_eliminate_regs (rtx, enum machine_mode, rtx);
 extern void lra (FILE *);
 extern void lra_init_once (void);
 extern void lra_finish_once (void);
+
+#endif /* GCC_LRA_H */
diff --git a/gcc/lto-section-names.h b/gcc/lto-section-names.h
index 19a992d..cb75230 100644
--- a/gcc/lto-section-names.h
+++ b/gcc/lto-section-names.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_LTO_SECTION_NAMES_H
+#define GCC_LTO_SECTION_NAMES_H
+
 /* The string that is the prefix on the section names we make for lto.
    For decls the DECL_ASSEMBLER_NAME is appended to make the section
    name for the functions and static_initializers.  For other types of
@@ -26,3 +29,5 @@ along with GCC; see the file COPYING3.  If not see
 /* Segment name for LTO sections.  This is only used for Mach-O.  */
 
 #define LTO_SEGMENT_NAME "__GNU_LTO"
+
+#endif /* GCC_LTO_SECTION_NAMES_H */
diff --git a/gcc/read-md.h b/gcc/read-md.h
index be26bdd..cb328b8 100644
--- a/gcc/read-md.h
+++ b/gcc/read-md.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_READ_MD_H
+#define GCC_READ_MD_H
+
 #include "obstack.h"
 #include "hashtab.h"
 
@@ -138,3 +141,5 @@ extern void traverse_enum_types (htab_trav, void *);
 extern struct enum_type *lookup_enum_type (const char *);
 extern bool read_md_files (int, char **, bool (*) (const char *),
 			   directive_handler_t);
+
+#endif /* GCC_READ_MD_H */
diff --git a/gcc/reload.h b/gcc/reload.h
index eb4ccd3..e9c1095 100644
--- a/gcc/reload.h
+++ b/gcc/reload.h
@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_RELOAD_H
+#define GCC_RELOAD_H
 
 /* If secondary reloads are the same for inputs and outputs, define those
    macros here.  */
@@ -458,3 +460,5 @@ extern rtx reload_adjust_reg_for_mode (rtx, enum machine_mode);
 
 /* Allocate or grow the reg_equiv tables, initializing new entries to 0.  */
 extern void grow_reg_equivs (void);
+
+#endif /* GCC_RELOAD_H */
diff --git a/gcc/rtl-error.h b/gcc/rtl-error.h
index 479e2e5..ad38545 100644
--- a/gcc/rtl-error.h
+++ b/gcc/rtl-error.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_RTL_ERROR_H
+#define GCC_RTL_ERROR_H
+
 #include "rtl.h"
 #include "diagnostic-core.h"
 
@@ -24,3 +27,5 @@ extern void error_for_asm (const rtx_insn *, const char *,
 			   ...) ATTRIBUTE_GCC_DIAG(2,3);
 extern void warning_for_asm (const rtx_insn *, const char *,
 			     ...) ATTRIBUTE_GCC_DIAG(2,3);
+
+#endif /* GCC_RTL_ERROR_H */
diff --git a/gcc/sdbout.h b/gcc/sdbout.h
index 00368b6..3d8a886 100644
--- a/gcc/sdbout.h
+++ b/gcc/sdbout.h
@@ -17,5 +17,10 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_SDBOUT_H
+#define GCC_SDBOUT_H
+
 extern void sdbout_symbol (tree, int);
 extern void sdbout_types (tree);
+
+#endif /* GCC_SDBOUT_H */
diff --git a/gcc/targhooks.h b/gcc/targhooks.h
index dad9520..9178c30 100644
--- a/gcc/targhooks.h
+++ b/gcc/targhooks.h
@@ -17,6 +17,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_TARGHOOKS_H
+#define GCC_TARGHOOKS_H
+
 extern bool default_legitimate_address_p (enum machine_mode, rtx, bool);
 
 extern void default_external_libcall (rtx);
@@ -212,3 +215,5 @@ extern tree std_gimplify_va_arg_expr (tree, tree, gimple_seq *, gimple_seq *);
 extern bool can_use_doloop_if_innermost (const widest_int &,
 					 const widest_int &,
 					 unsigned int, bool);
+
+#endif /* GCC_TARGHOOKS_H */
diff --git a/gcc/tree-affine.h b/gcc/tree-affine.h
index 48dd2a7..5cf3124 100644
--- a/gcc/tree-affine.h
+++ b/gcc/tree-affine.h
@@ -20,6 +20,9 @@ along with GCC; see the file COPYING3.  If not see
 /* Affine combination of trees.  We keep track of at most MAX_AFF_ELTS elements
    to make things simpler; this is sufficient in most cases.  */
 
+#ifndef GCC_TREE_AFFINE_H
+#define GCC_TREE_AFFINE_H
+
 #include "hash-map.h"
 #include "wide-int.h"
 
@@ -99,3 +102,5 @@ aff_combination_zero_p (aff_tree *aff)
 
   return false;
 }
+
+#endif /* GCC_TREE_AFFINE_H */
diff --git a/gcc/xcoff.h b/gcc/xcoff.h
index 9a07173..af55ebd 100644
--- a/gcc/xcoff.h
+++ b/gcc/xcoff.h
@@ -16,6 +16,9 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_XCOFF_H
+#define GCC_XCOFF_H
+
 /* Storage classes in XCOFF object file format designed for DBX's use.
    This info is from the `Files Reference' manual for IBM's AIX version 3
    for the RS6000.  */
@@ -33,3 +36,5 @@ along with GCC; see the file COPYING3.  If not see
 #define C_DECL		0x8c
 #define C_ENTRY		0x8d
 #define C_FUN		0x8e
+
+#endif /* GCC_XCOFF_H */
diff --git a/gcc/xcoffout.h b/gcc/xcoffout.h
index 3373c8e..b45518c 100644
--- a/gcc/xcoffout.h
+++ b/gcc/xcoffout.h
@@ -18,6 +18,8 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
+#ifndef GCC_XCOFFOUT_H
+#define GCC_XCOFFOUT_H
 
 /* Tags and typedefs are C_DECL in XCOFF, not C_LSYM.  */
 
@@ -184,3 +186,5 @@ extern void xcoffout_end_block (unsigned, unsigned);
 extern int xcoff_assign_fundamental_type_number (tree);
 extern void xcoffout_declare_function (FILE *, tree, const char *);
 extern void xcoffout_source_line (unsigned int, const char *, int, bool);
+
+#endif /* GCC_XCOFFOUT_H */