bfd_merge_private_bfd_data tidy

bfd_merge_private_bfd_data and _bfd_generic_verify_endian_match are
linker functions, so move them to linker.c.

bfd/
	* Makefile.am (LIBBFD_H_FILES): Update.
	* doc/Makefile.am (LIBBFD_H_DEP): Likewise.
	* cpu-sh.c (sh_merge_bfd_arch): Move to..
	* elf32-sh.c: ..here, and make static.
	* elf32-arc.c (arc_elf_merge_private_bfd_data): Delete extraneous
	error.
	* elf32-cris.c (cris_elf_merge_private_bfd_data): Don't call
	_bfd_generic_verify_endian_match.
	* elf32-microblaze.c (microblaze_elf_merge_private_bfd_data): Delete.
	(bfd_elf32_bfd_merge_private_bfd_data): Define as
	_bfd_generic_verify_endian_match.
	* elf32-mt.c (mt_elf_merge_private_bfd_data): Don't test
	boolean == FALSE.
	* elf32-xgate.c (_bfd_xgate_elf_merge_private_bfd_data): Delete.
	(bfd_elf32_bfd_merge_private_bfd_data): Don't define.
	* elf32-xgate.h (_bfd_xgate_elf_merge_private_bfd_data): Delete.
	* libbfd-in.h (_bfd_generic_verify_endian_match): Delete.
	* libbfd.c (_bfd_generic_verify_endian_match): Move to..
	* linker.c: ..here, and make internal.
	* bfd.c (bfd_merge_private_bfd_data): Move to..
	* linker.c: ..here.
	* Makefile.in: Regenerate.
	* doc/Makefile.in: Regenerate.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.
opcodes/
	* sh-opc.h (sh_merge_bfd_arch): Delete prototype.

19 files changed, 155 insertions, 162 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index a276240..d500e3f 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,31 @@
+2016-10-07  Alan Modra  <amodra@gmail.com>
+
+	* Makefile.am (LIBBFD_H_FILES): Update.
+	* doc/Makefile.am (LIBBFD_H_DEP): Likewise.
+	* cpu-sh.c (sh_merge_bfd_arch): Move to..
+	* elf32-sh.c: ..here, and make static.
+	* elf32-arc.c (arc_elf_merge_private_bfd_data): Delete extraneous
+	error.
+	* elf32-cris.c (cris_elf_merge_private_bfd_data): Don't call
+	_bfd_generic_verify_endian_match.
+	* elf32-microblaze.c (microblaze_elf_merge_private_bfd_data): Delete.
+	(bfd_elf32_bfd_merge_private_bfd_data): Define as
+	_bfd_generic_verify_endian_match.
+	* elf32-mt.c (mt_elf_merge_private_bfd_data): Don't test
+	boolean == FALSE.
+	* elf32-xgate.c (_bfd_xgate_elf_merge_private_bfd_data): Delete.
+	(bfd_elf32_bfd_merge_private_bfd_data): Don't define.
+	* elf32-xgate.h (_bfd_xgate_elf_merge_private_bfd_data): Delete.
+	* libbfd-in.h (_bfd_generic_verify_endian_match): Delete.
+	* libbfd.c (_bfd_generic_verify_endian_match): Move to..
+	* linker.c: ..here, and make internal.
+	* bfd.c (bfd_merge_private_bfd_data): Move to..
+	* linker.c: ..here.
+	* Makefile.in: Regenerate.
+	* doc/Makefile.in: Regenerate.
+	* bfd-in2.h: Regenerate.
+	* libbfd.h: Regenerate.
+
 2016-10-06  Alan Modra  <amodra@gmail.com>
 
 	* coff-h8300.c: Spell fall through comments consistently.
diff --git a/bfd/Makefile.am b/bfd/Makefile.am
index 53563e1..e04be5a 100644
--- a/bfd/Makefile.am
+++ b/bfd/Makefile.am
@@ -1002,8 +1002,8 @@ BFD_H_FILES = bfd-in.h init.c opncls.c libbfd.c \
 	syms.c bfd.c archive.c corefile.c targets.c format.c \
 	linker.c simple.c compress.c
 BFD64_H_FILES = archive64.c
-LIBBFD_H_FILES = libbfd-in.h init.c libbfd.c bfdio.c bfdwin.c \
-	cache.c reloc.c archures.c elf.c
+LIBBFD_H_FILES = libbfd-in.h libbfd.c bfdio.c bfdwin.c \
+	cache.c reloc.c archures.c linker.c
 LIBCOFF_H_FILES = libcoff-in.h coffcode.h
 
 # Could really use a "copy-if-change"...
diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index 125a6c8..64658c5 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -1176,8 +1176,8 @@ BFD_H_FILES = bfd-in.h init.c opncls.c libbfd.c \
 	linker.c simple.c compress.c
 
 BFD64_H_FILES = archive64.c
-LIBBFD_H_FILES = libbfd-in.h init.c libbfd.c bfdio.c bfdwin.c \
-	cache.c reloc.c archures.c elf.c
+LIBBFD_H_FILES = libbfd-in.h libbfd.c bfdio.c bfdwin.c \
+	cache.c reloc.c archures.c linker.c
 
 LIBCOFF_H_FILES = libcoff-in.h coffcode.h
 MOSTLYCLEANFILES = ofiles stamp-ofiles
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index 1dc1c74..35302ea 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -6975,11 +6975,6 @@ bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
 #define bfd_copy_private_bfd_data(ibfd, obfd) \
      BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
                (ibfd, obfd))
-bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
-
-#define bfd_merge_private_bfd_data(ibfd, obfd) \
-     BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
-               (ibfd, obfd))
 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
 
 #define bfd_set_private_flags(abfd, flags) \
@@ -7620,6 +7615,11 @@ bfd_boolean bfd_link_check_relocs
 bfd_boolean _bfd_generic_link_check_relocs
    (bfd *abfd, struct bfd_link_info *info);
 
+bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
+
+#define bfd_merge_private_bfd_data(ibfd, obfd) \
+     BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
+               (ibfd, obfd))
 /* Extracted from simple.c.  */
 bfd_byte *bfd_simple_get_relocated_section_contents
    (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
diff --git a/bfd/bfd.c b/bfd/bfd.c
index 0526742..03875d0 100644
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -1408,27 +1408,6 @@ DESCRIPTION
 
 /*
 FUNCTION
-	bfd_merge_private_bfd_data
-
-SYNOPSIS
-	bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
-
-DESCRIPTION
-	Merge private BFD information from the BFD @var{ibfd} to the
-	the output file BFD @var{obfd} when linking.  Return <<TRUE>>
-	on success, <<FALSE>> on error.  Possible error returns are:
-
-	o <<bfd_error_no_memory>> -
-	Not enough memory exists to create private data for @var{obfd}.
-
-.#define bfd_merge_private_bfd_data(ibfd, obfd) \
-.     BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
-.		(ibfd, obfd))
-
-*/
-
-/*
-FUNCTION
 	bfd_set_private_flags
 
 SYNOPSIS
diff --git a/bfd/cpu-sh.c b/bfd/cpu-sh.c
index 9b14173..f920826 100644
--- a/bfd/cpu-sh.c
+++ b/bfd/cpu-sh.c
@@ -496,50 +496,3 @@ sh_get_bfd_mach_from_arch_set (unsigned int arch_set)
 
   return result;
 }
-
-
-/* Merge the architecture type of two BFD files, such that the
-   resultant architecture supports all the features required
-   by the two input BFDs.
-   If the input BFDs are multually incompatible - i.e. one uses
-   DSP while the other uses FPU - or there is no known architecture
-   that fits the requirements then an error is emitted.  */
-
-bfd_boolean
-sh_merge_bfd_arch (bfd *ibfd, bfd *obfd)
-{
-  unsigned int old_arch, new_arch, merged_arch;
-
-  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
-    return FALSE;
-
-  old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
-  new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
-
-  merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
-
-  if (!SH_VALID_CO_ARCH_SET (merged_arch))
-    {
-      _bfd_error_handler
-	("%B: uses %s instructions while previous modules use %s instructions",
-	 ibfd,
-	 SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
-	 SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
-      bfd_set_error (bfd_error_bad_value);
-      return FALSE;
-    }
-  else if (!SH_VALID_ARCH_SET (merged_arch))
-    {
-      _bfd_error_handler
-	("internal error: merge of architecture '%s' with architecture '%s' produced unknown architecture\n",
-	 bfd_printable_name (obfd),
-	 bfd_printable_name (ibfd));
-      bfd_set_error (bfd_error_bad_value);
-      return FALSE;
-    }
-
-  bfd_default_set_arch_mach (obfd, bfd_arch_sh,
-			     sh_get_bfd_mach_from_arch_set (merged_arch));
-
-  return TRUE;
-}
diff --git a/bfd/doc/Makefile.am b/bfd/doc/Makefile.am
index c44c803..1ec5856 100644
--- a/bfd/doc/Makefile.am
+++ b/bfd/doc/Makefile.am
@@ -252,14 +252,13 @@ linker.stamp: $(srcdir)/../linker.c $(srcdir)/doc.str $(MKDOC)
 
 LIBBFD_H_DEP = \
 	$(srcdir)/../libbfd-in.h	\
-	$(srcdir)/../init.c		\
 	$(srcdir)/../libbfd.c		\
 	$(srcdir)/../bfdio.c		\
 	$(srcdir)/../bfdwin.c		\
 	$(srcdir)/../cache.c		\
 	$(srcdir)/../reloc.c		\
 	$(srcdir)/../archures.c		\
-	$(srcdir)/../elf.c		\
+	$(srcdir)/../linker.c		\
 	$(srcdir)/header.sed		\
 	$(srcdir)/proto.str		\
 	$(MKDOC)
diff --git a/bfd/doc/Makefile.in b/bfd/doc/Makefile.in
index b992872..1a6d811 100644
--- a/bfd/doc/Makefile.in
+++ b/bfd/doc/Makefile.in
@@ -379,14 +379,13 @@ AM_CPPFLAGS = -I.. -I$(srcdir)/.. -I$(srcdir)/../../include \
 
 LIBBFD_H_DEP = \
 	$(srcdir)/../libbfd-in.h	\
-	$(srcdir)/../init.c		\
 	$(srcdir)/../libbfd.c		\
 	$(srcdir)/../bfdio.c		\
 	$(srcdir)/../bfdwin.c		\
 	$(srcdir)/../cache.c		\
 	$(srcdir)/../reloc.c		\
 	$(srcdir)/../archures.c		\
-	$(srcdir)/../elf.c		\
+	$(srcdir)/../linker.c		\
 	$(srcdir)/header.sed		\
 	$(srcdir)/proto.str		\
 	$(MKDOC)
diff --git a/bfd/elf32-arc.c b/bfd/elf32-arc.c
index 9fb83b5..002674b 100644
--- a/bfd/elf32-arc.c
+++ b/bfd/elf32-arc.c
@@ -552,12 +552,7 @@ arc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 
    /* Check if we have the same endianess.  */
   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
-    {
-      _bfd_error_handler (_("ERROR: Endian Match failed. Attempting to link "
-			    "%B with binary %s of opposite endian-ness"),
-			  ibfd, bfd_get_filename (obfd));
-      return FALSE;
-    }
+    return FALSE;
 
   /* Collect ELF flags.  */
   in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK;
diff --git a/bfd/elf32-cris.c b/bfd/elf32-cris.c
index 1722b75..255a9fd 100644
--- a/bfd/elf32-cris.c
+++ b/bfd/elf32-cris.c
@@ -4233,18 +4233,14 @@ cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 static bfd_boolean
 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
 {
-  /* Call the base function.  */
-  if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
-    return FALSE;
-
-  /* If output is big-endian for some obscure reason, stop here.  */
-  if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
-    return FALSE;
-
   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
     return TRUE;
 
+  /* Call the base function.  */
+  if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
+    return FALSE;
+
   /* Do what we really came here for.  */
   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
 }
diff --git a/bfd/elf32-microblaze.c b/bfd/elf32-microblaze.c
index 778c6f0..b29ac04 100644
--- a/bfd/elf32-microblaze.c
+++ b/bfd/elf32-microblaze.c
@@ -1596,21 +1596,6 @@ microblaze_elf_relocate_section (bfd *output_bfd,
 
   return ret;
 }
-
-/* Merge backend specific data from an object file to the output
-   object file when linking.
-
-   Note: We only use this hook to catch endian mismatches.  */
-static bfd_boolean
-microblaze_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
-{
-  /* Check if we have the same endianess.  */
-  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
-    return FALSE;
-
-  return TRUE;
-}
-
 
 /* Calculate fixup value for reference.  */
 
@@ -3500,7 +3485,7 @@ microblaze_elf_add_symbol_hook (bfd *abfd,
 #define bfd_elf32_bfd_is_local_label_name       microblaze_elf_is_local_label_name
 #define elf_backend_relocate_section		microblaze_elf_relocate_section
 #define bfd_elf32_bfd_relax_section             microblaze_elf_relax_section
-#define bfd_elf32_bfd_merge_private_bfd_data    microblaze_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_merge_private_bfd_data    _bfd_generic_verify_endian_match
 #define bfd_elf32_bfd_reloc_name_lookup		microblaze_elf_reloc_name_lookup
 
 #define elf_backend_gc_mark_hook		microblaze_elf_gc_mark_hook
diff --git a/bfd/elf32-mt.c b/bfd/elf32-mt.c
index f3e7a5b..9f7d3fc 100644
--- a/bfd/elf32-mt.c
+++ b/bfd/elf32-mt.c
@@ -508,7 +508,7 @@ mt_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
   bfd_boolean  ok = TRUE;
 
   /* Check if we have the same endianness.  */
-  if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
+  if (!_bfd_generic_verify_endian_match (ibfd, obfd))
     return FALSE;
 
   /* If they're not both mt, then merging is meaningless, so just
diff --git a/bfd/elf32-sh.c b/bfd/elf32-sh.c
index 7f108fb..6a027c3 100644
--- a/bfd/elf32-sh.c
+++ b/bfd/elf32-sh.c
@@ -6414,6 +6414,54 @@ sh_find_elf_flags (unsigned int arch_set)
   return sh_elf_get_flags_from_mach (bfd_mach);
 }
 
+/* Merge the architecture type of two BFD files, such that the
+   resultant architecture supports all the features required
+   by the two input BFDs.
+   If the input BFDs are multually incompatible - i.e. one uses
+   DSP while the other uses FPU - or there is no known architecture
+   that fits the requirements then an error is emitted.  */
+
+static bfd_boolean
+sh_merge_bfd_arch (bfd *ibfd, bfd *obfd)
+{
+  unsigned int old_arch, new_arch, merged_arch;
+
+  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
+    return FALSE;
+
+  old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
+  new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
+
+  merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
+
+  if (!SH_VALID_CO_ARCH_SET (merged_arch))
+    {
+      _bfd_error_handler
+	("%B: uses %s instructions while previous modules "
+	 "use %s instructions",
+	 ibfd,
+	 SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
+	 SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+  else if (!SH_VALID_ARCH_SET (merged_arch))
+    {
+      _bfd_error_handler
+	("internal error: merge of architecture '%s' with "
+	 "architecture '%s' produced unknown architecture",
+	 bfd_printable_name (obfd),
+	 bfd_printable_name (ibfd));
+      bfd_set_error (bfd_error_bad_value);
+      return FALSE;
+    }
+
+  bfd_default_set_arch_mach (obfd, bfd_arch_sh,
+			     sh_get_bfd_mach_from_arch_set (merged_arch));
+
+  return TRUE;
+}
+
 /* This routine initialises the elf flags when required and
    calls sh_merge_bfd_arch() to check dsp/fpu compatibility.  */
 
diff --git a/bfd/elf32-xgate.c b/bfd/elf32-xgate.c
index d48c658..13cdf66 100644
--- a/bfd/elf32-xgate.c
+++ b/bfd/elf32-xgate.c
@@ -654,16 +654,6 @@ _bfd_xgate_elf_set_private_flags (bfd *abfd ATTRIBUTE_UNUSED,
   return TRUE;
 }
 
-/* Merge backend specific data from an object file to the output
-   object file when linking.  */
-
-bfd_boolean
-_bfd_xgate_elf_merge_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
-				       bfd *obfd ATTRIBUTE_UNUSED)
-{
-  return TRUE;
-}
-
 bfd_boolean
 _bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
 {
@@ -722,7 +712,6 @@ elf32_xgate_post_process_headers (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_in
 #define elf_backend_add_symbol_hook          elf32_xgate_add_symbol_hook
 
 #define bfd_elf32_bfd_link_hash_table_create xgate_elf_bfd_link_hash_table_create
-#define bfd_elf32_bfd_merge_private_bfd_data _bfd_xgate_elf_merge_private_bfd_data
 #define bfd_elf32_bfd_set_private_flags      _bfd_xgate_elf_set_private_flags
 #define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
 
diff --git a/bfd/elf32-xgate.h b/bfd/elf32-xgate.h
index 8ea069a..8002861 100644
--- a/bfd/elf32-xgate.h
+++ b/bfd/elf32-xgate.h
@@ -29,7 +29,6 @@
 #include "elf/xgate.h"
 
 /* Set and control ELF flags in ELF header.  */
-extern bfd_boolean _bfd_xgate_elf_merge_private_bfd_data (bfd*,bfd*);
 extern bfd_boolean _bfd_xgate_elf_set_private_flags (bfd*,flagword);
 extern bfd_boolean _bfd_xgate_elf_print_private_bfd_data (bfd*, void*);
 
diff --git a/bfd/libbfd-in.h b/bfd/libbfd-in.h
index f27adc9..83ddd8b 100644
--- a/bfd/libbfd-in.h
+++ b/bfd/libbfd-in.h
@@ -749,10 +749,6 @@ extern bfd_size_type _bfd_stringtab_add
 /* Write out a string table.  */
 extern bfd_boolean _bfd_stringtab_emit
   (bfd *, struct bfd_strtab_hash *);
-
-/* Check that endianness of input and output file match.  */
-extern bfd_boolean _bfd_generic_verify_endian_match
-  (bfd *, bfd *);
 
 /* Macros to tell if bfds are read or write enabled.
 
diff --git a/bfd/libbfd.c b/bfd/libbfd.c
index 4583335..7a6f381 100644
--- a/bfd/libbfd.c
+++ b/bfd/libbfd.c
@@ -922,32 +922,6 @@ bfd_generic_is_local_label_name (bfd *abfd, const char *name)
   return name[0] == locals_prefix;
 }
 
-/*  Can be used from / for bfd_merge_private_bfd_data to check that
-    endianness matches between input and output file.  Returns
-    TRUE for a match, otherwise returns FALSE and emits an error.  */
-bfd_boolean
-_bfd_generic_verify_endian_match (bfd *ibfd, bfd *obfd)
-{
-  if (ibfd->xvec->byteorder != obfd->xvec->byteorder
-      && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
-      && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
-    {
-      const char *msg;
-
-      if (bfd_big_endian (ibfd))
-	msg = _("%B: compiled for a big endian system and target is little endian");
-      else
-	msg = _("%B: compiled for a little endian system and target is big endian");
-
-      _bfd_error_handler (msg, ibfd);
-
-      bfd_set_error (bfd_error_wrong_format);
-      return FALSE;
-    }
-
-  return TRUE;
-}
-
 /* Give a warning at runtime if someone compiles code which calls
    old routines.  */
 
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index 99ff2d3..c6f8ecc 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -1,6 +1,6 @@
 /* DO NOT EDIT!  -*- buffer-read-only: t -*-  This file is automatically 
-   generated from "libbfd-in.h", "init.c", "libbfd.c", "bfdio.c", 
-   "bfdwin.c", "cache.c", "reloc.c", "archures.c" and "elf.c".
+   generated from "libbfd-in.h", "libbfd.c", "bfdio.c", "bfdwin.c", 
+   "cache.c", "reloc.c", "archures.c" and "linker.c".
    Run "make headers" in your build bfd/ to regenerate.  */
 
 /* libbfd.h -- Declarations used by bfd library *implementation*.
@@ -754,10 +754,6 @@ extern bfd_size_type _bfd_stringtab_add
 /* Write out a string table.  */
 extern bfd_boolean _bfd_stringtab_emit
   (bfd *, struct bfd_strtab_hash *);
-
-/* Check that endianness of input and output file match.  */
-extern bfd_boolean _bfd_generic_verify_endian_match
-  (bfd *, bfd *);
 
 /* Macros to tell if bfds are read or write enabled.
 
@@ -868,7 +864,6 @@ extern bfd_vma read_unsigned_leb128 (bfd *, bfd_byte *, unsigned int *);
 extern bfd_signed_vma read_signed_leb128 (bfd *, bfd_byte *, unsigned int *);
 extern bfd_vma safe_read_leb128 (bfd *, bfd_byte *, unsigned int *,
 				 bfd_boolean, const bfd_byte * const);
-/* Extracted from init.c.  */
 /* Extracted from libbfd.c.  */
 bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
 
@@ -3157,7 +3152,10 @@ void *bfd_arch_default_fill (bfd_size_type count,
     bfd_boolean is_bigendian,
     bfd_boolean code);
 
-/* Extracted from elf.c.  */
+/* Extracted from linker.c.  */
+bfd_boolean _bfd_generic_verify_endian_match
+   (bfd *ibfd, bfd *obfd);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/bfd/linker.c b/bfd/linker.c
index 8dff5a0..7830b29 100644
--- a/bfd/linker.c
+++ b/bfd/linker.c
@@ -3332,3 +3332,58 @@ _bfd_generic_link_check_relocs (bfd *abfd ATTRIBUTE_UNUSED,
 {
   return TRUE;
 }
+
+/*
+FUNCTION
+	bfd_merge_private_bfd_data
+
+SYNOPSIS
+	bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
+
+DESCRIPTION
+	Merge private BFD information from the BFD @var{ibfd} to the
+	the output file BFD @var{obfd} when linking.  Return <<TRUE>> on success,
+	<<FALSE>> on error.  Possible error returns are:
+
+	o <<bfd_error_no_memory>> -
+	Not enough memory exists to create private data for @var{obfd}.
+
+.#define bfd_merge_private_bfd_data(ibfd, obfd) \
+.     BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
+.		(ibfd, obfd))
+
+*/
+
+/*
+INTERNAL_FUNCTION
+	_bfd_generic_verify_endian_match
+
+SYNOPSIS
+	bfd_boolean _bfd_generic_verify_endian_match
+	  (bfd *ibfd, bfd *obfd);
+
+DESCRIPTION
+	Can be used from / for bfd_merge_private_bfd_data to check that
+	endianness matches between input and output file.  Returns
+	TRUE for a match, otherwise returns FALSE and emits an error.
+*/
+
+bfd_boolean
+_bfd_generic_verify_endian_match (bfd *ibfd, bfd *obfd)
+{
+  if (ibfd->xvec->byteorder != obfd->xvec->byteorder
+      && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
+      && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
+    {
+      if (bfd_big_endian (ibfd))
+	_bfd_error_handler (_("%B: compiled for a big endian system "
+			      "and target is little endian"), ibfd);
+      else
+	_bfd_error_handler (_("%B: compiled for a little endian system "
+			      "and target is big endian"), ibfd);
+      bfd_set_error (bfd_error_wrong_format);
+      return FALSE;
+    }
+
+  return TRUE;
+}