[Bug ld/12496] Linker fails with "could not read symbols: Bad value" message

[d.g.gorbachev at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12496

--- Comment #4 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 
2011-02-23 06:43:06 UTC ---
I can reproduce it with recent lto-mixed LD (and GCC 4.5/4.6; for 4.5, add
-fuse-linker-plugin to CFLAGS).

I see elf_link_add_archive_symbols() is called twice for libdiv.a:

#0  elf_link_add_archive_symbols (abfd=0x81914a8, info=0x8178ce0)
    at ../../binutils-hjl/bfd/elflink.c:5074
#1  0x080bc6b6 in bfd_elf_link_add_symbols (abfd=0x81914a8, info=0x8178ce0)
    at ../../binutils-hjl/bfd/elflink.c:5135
#2  0x08055d12 in load_symbols (entry=0x8184130, place=0xbfffedf8)
    at ../../binutils-hjl/ld/ldlang.c:2827
#3  0x080566ff in open_input_bfds (s=0x8184130, force=1)
    at ../../binutils-hjl/ld/ldlang.c:3258
#4  0x08056651 in open_input_bfds (s=0x81840fc, force=0)
    at ../../binutils-hjl/ld/ldlang.c:3228
#5  0x0805b551 in lang_process () at ../../binutils-hjl/ld/ldlang.c:6534
#6  0x080609ae in main (argc=31, argv=0xbfffef94)
    at ../../binutils-hjl/ld/ldmain.c:437

and second time:

#0  elf_link_add_archive_symbols (abfd=0x81914a8, info=0x8178ce0)
    at ../../binutils-hjl/bfd/elflink.c:5067
#1  0x080bc6b6 in bfd_elf_link_add_symbols (abfd=0x81914a8, info=0x8178ce0)
    at ../../binutils-hjl/bfd/elflink.c:5135
#2  0x08055d12 in load_symbols (entry=0x8184130, place=0xbfffedf8)
    at ../../binutils-hjl/ld/ldlang.c:2827
#3  0x080566ff in open_input_bfds (s=0x8184130, force=1)
    at ../../binutils-hjl/ld/ldlang.c:3258
#4  0x08056651 in open_input_bfds (s=0x81840fc, force=0)
    at ../../binutils-hjl/ld/ldlang.c:3228
#5  0x0805b551 in lang_process ()
    at ../../binutils-hjl/ld/ldlang.c:6534
#6  0x080609ae in main (argc=31, argv=0xbfffef94)
    at ../../binutils-hjl/ld/ldmain.c:437

This is suspicious:

ldlang.c:3244
/* If we are being called from within a group, and this 
   is an archive which has already been searched, then 
   force it to be researched unless the whole archive 
   has been loaded already.  */

elflink.c:5064
/* Doublecheck that we have not included this object 
   already--it should be impossible, but there may be 
   something wrong with the archive.  */

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