[PATCH v2] MIPS: Don't move __gnu_lto_slim to .scommon

[Alan Modra]

I think the patch is OK, but the same should be applied to another
place to stop objcopy modifying __gnu_lto_slim.

mips-linux-gnu testcase after running make check:
  binutils/objcopy ld/tmpdir/pr15323a-r.o ld/tmpdir/xxx
then inspect ld/tmpdir/xxx with readelf.

I'm going to apply the following to mainline, and will also apply to
the 2.41 branch tomorrow if no one objects.

	* elfxx-mips.c (_bfd_mips_elf_symbol_processing): Don't treat
	__gnu_lto_slim as SHN_MIPS_SCOMMON.
	(_bfd_mips_elf_add_symbol_hook): Likewise.

diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c
index 71f2dc9d779..1e9851c3190 100644
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -7176,10 +7176,11 @@ _bfd_mips_elf_symbol_processing (bfd *abfd, asymbol *asym)
 
     case SHN_COMMON:
       /* Common symbols less than the GP size are automatically
-	 treated as SHN_MIPS_SCOMMON symbols on IRIX5.  */
+	 treated as SHN_MIPS_SCOMMON symbols, with some exceptions.  */
       if (asym->value > elf_gp_size (abfd)
 	  || ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_TLS
-	  || IRIX_COMPAT (abfd) == ict_irix6)
+	  || IRIX_COMPAT (abfd) == ict_irix6
+	  || strcmp (asym->name, "__gnu_lto_slim") == 0)
 	break;
       /* Fall through.  */
     case SHN_MIPS_SCOMMON:
@@ -7862,10 +7863,11 @@ _bfd_mips_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
     {
     case SHN_COMMON:
       /* Common symbols less than the GP size are automatically
-	 treated as SHN_MIPS_SCOMMON symbols.  */
+	 treated as SHN_MIPS_SCOMMON symbols, with some exceptions.  */
       if (sym->st_size > elf_gp_size (abfd)
 	  || ELF_ST_TYPE (sym->st_info) == STT_TLS
-	  || IRIX_COMPAT (abfd) == ict_irix6)
+	  || IRIX_COMPAT (abfd) == ict_irix6
+	  || strcmp (*namep, "__gnu_lto_slim") == 0)
 	break;
       /* Fall through.  */
     case SHN_MIPS_SCOMMON:

-- 
Alan Modra
Australia Development Lab, IBM