bfd:

	* bfd-in.h (bfd_elf32_arm_set_target_relocs): Add new parameter.
	* bfd-in2.h: Regenerate.
	* elf32-arm.c (struct elf_arm_obj_tdata): Add field
	no_wchar_size_warning.
	(bfd_elf32_arm_set_target_relocs): Add new parameter
	no_wchar_warn.
	(elf32_arm_merge_eabi_attributes): Give a warning, not an error,
	for conflicting wchar_t attributes.  Do not warn if
	--no-wchar-size-warning.  Make diagnostic text more specific.

ld:
	* ld.texinfo (--no-wchar-size-warning): Document new ARM option.
	* emultempl/armelf.em (no_wchar_size_warning): New.
	(arm_elf_create_output_section_statements): Pass
	no_wchar_size_warning to arm_elf_create_output_section_statements.
	(OPTION_NO_WCHAR_SIZE_WARNING): New.
	(PARSE_AND_LIST_LONGOPTS): Add no-wchar-size-warning.
	(PARSE_AND_LIST_OPTIONS): List --no-wchar-size-warning.
	(PARSE_AND_LIST_ARGS_CASES): Handle --no-wchar-size-warning.

ld/testsuite:
	* ld-arm/attr-merge-wchar-0.s,ld-arm/attr-merge-wchar-2.s,
	ld-arm/attr-merge-wchar-4.s, ld-arm/attr-merge-wchar-00-nowarn.d,
	ld-arm/attr-merge-wchar-00.d, ld-arm/attr-merge-wchar-02-nowarn.d,
	ld-arm/attr-merge-wchar-02.d, ld-arm/attr-merge-wchar-04-nowarn.d,
	ld-arm/attr-merge-wchar-04.d, ld-arm/attr-merge-wchar-20-nowarn.d,
	ld-arm/attr-merge-wchar-20.d, ld-arm/attr-merge-wchar-22-nowarn.d,
	ld-arm/attr-merge-wchar-22.d, ld-arm/attr-merge-wchar-24-nowarn.d,
	ld-arm/attr-merge-wchar-24.d, ld-arm/attr-merge-wchar-40-nowarn.d,
	ld-arm/attr-merge-wchar-40.d, ld-arm/attr-merge-wchar-42-nowarn.d,
	ld-arm/attr-merge-wchar-42.d, ld-arm/attr-merge-wchar-44-nowarn.d,
	ld-arm/attr-merge-wchar-44.d: New.
	* ld-arm/arm-elf.exp: Run new tests.

4 files changed, 25 insertions, 7 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 4a676b1..fd30fd3 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,15 @@
+2008-07-18  Joseph Myers  <joseph@codesourcery.com>
+
+	* bfd-in.h (bfd_elf32_arm_set_target_relocs): Add new parameter.
+	* bfd-in2.h: Regenerate.
+	* elf32-arm.c (struct elf_arm_obj_tdata): Add field
+	no_wchar_size_warning.
+	(bfd_elf32_arm_set_target_relocs): Add new parameter
+	no_wchar_warn.
+	(elf32_arm_merge_eabi_attributes): Give a warning, not an error,
+	for conflicting wchar_t attributes.  Do not warn if
+	--no-wchar-size-warning.  Make diagnostic text more specific.
+
 2008-07-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/6748
diff --git a/bfd/bfd-in.h b/bfd/bfd-in.h
index 3a3fa3f..21f4f4c 100644
--- a/bfd/bfd-in.h
+++ b/bfd/bfd-in.h
@@ -860,7 +860,7 @@ extern bfd_boolean bfd_elf32_arm_process_before_allocation
 
 void bfd_elf32_arm_set_target_relocs
   (bfd *, struct bfd_link_info *, int, char *, int, int, bfd_arm_vfp11_fix,
-   int, int);
+   int, int, int);
 
 extern bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
   (bfd *, struct bfd_link_info *);
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index c1ad8c7..087eff8 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -867,7 +867,7 @@ extern bfd_boolean bfd_elf32_arm_process_before_allocation
 
 void bfd_elf32_arm_set_target_relocs
   (bfd *, struct bfd_link_info *, int, char *, int, int, bfd_arm_vfp11_fix,
-   int, int);
+   int, int, int);
 
 extern bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
   (bfd *, struct bfd_link_info *);
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c
index 8fbaa35..8fc1542 100644
--- a/bfd/elf32-arm.c
+++ b/bfd/elf32-arm.c
@@ -2167,6 +2167,9 @@ struct elf_arm_obj_tdata
 
   /* Zero to warn when linking objects with incompatible enum sizes.  */
   int no_enum_size_warning;
+
+  /* Zero to warn when linking objects with incompatible wchar_t sizes.  */
+  int no_wchar_size_warning;
 };
 
 #define elf_arm_tdata(bfd) \
@@ -5271,7 +5274,8 @@ bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
                                  int fix_v4bx,
 				 int use_blx,
                                  bfd_arm_vfp11_fix vfp11_fix,
-				 int no_enum_warn, int pic_veneer)
+				 int no_enum_warn, int no_wchar_warn,
+				 int pic_veneer)
 {
   struct elf32_arm_link_hash_table *globals;
 
@@ -5296,6 +5300,7 @@ bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd,
 
   BFD_ASSERT (is_arm_elf (output_bfd));
   elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
+  elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
 }
 
 /* Replace the target offset of a Thumb bl or b.w instruction.  */
@@ -8315,13 +8320,14 @@ elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
 	    out_attr[i].i = in_attr[i].i;
 	  break;
 	case Tag_ABI_PCS_wchar_t:
-	  if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i)
+	  if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i
+	      && !elf_arm_tdata (obfd)->no_wchar_size_warning)
 	    {
 	      _bfd_error_handler
-		(_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd);
-	      return FALSE;
+		(_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"),
+		 ibfd, in_attr[i].i, out_attr[i].i);
 	    }
-	  if (in_attr[i].i)
+	  else if (in_attr[i].i && !out_attr[i].i)
 	    out_attr[i].i = in_attr[i].i;
 	  break;
 	case Tag_ABI_align8_needed: