patch for arm-elf bfd

[Philip Blundell]

Building Mozilla on Linux/ARM causes the linker to segfault while trying to 
generate a large shared library.  The problem is that this code in 
elf32_arm_relocate_section is being reached when sec->output_section is NULL:

	      if (relocation_needed)
		relocation = h->root.u.def.value
		  + sec->output_section->vma
		  + sec->output_offset;
	      else
		relocation = 0;

Since building without debugging avoids the problem, I came up with the 
following patch by analogy to the i386 code, which seems to fix the crash for 
me.  Is this correct?

Thanks

p.

2000-09-03  Philip Blundell  <philb@gnu.org>

	* elf32-arm.h (elf32_arm_relocate_section): Don't try to relocate
	references to undefined symbols in debugging sections.

Index: elf32-arm.h
===================================================================
RCS file: /cvs/src/src/bfd/elf32-arm.h,v
retrieving revision 1.34
diff -u -p -u -r1.34 elf32-arm.h
--- elf32-arm.h	2000/08/10 19:41:07	1.34
+++ elf32-arm.h	2000/09/03 13:12:24
@@ -1794,7 +1794,14 @@ elf32_arm_relocate_section (output_bfd, 
 	              	  (!info->symbolic && h->dynindx != -1)
 	                  || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
 			  )
-	              && ((input_section->flags & SEC_ALLOC) != 0)
+	              && ((input_section->flags & SEC_ALLOC) != 0
+			  /* DWARF will emit R_ARM_ABS32 relocations in its
+			     sections against symbols defined externally
+			     in shared libraries.  We can't do anything
+			     with them here.  */
+			  || ((input_section->flags & SEC_DEBUGGING) != 0
+			      && (h->elf_link_hash_flags
+				  & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
 		      )
 	            relocation_needed = 0;
 		  break;