https://sourceware.org/bugzilla/show_bug.cgi?id=25828

--- Comment #1 from Stephen Casner <casner at acm dot org> ---
Created attachment 12462
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12462&action=edit
Patch to fix undefined symbols and sign extension

When bfd/pdp11.c was copied from bfd/aoutx.h, the #defines for external symbol
types N_TEXT etc. were #undef'd and then #define'd with new values.  But N_STAB
was not changed even though the new value for N_EXT overlapped with it.  This
caused aout_link_write_symbols() to treat global symbols referenced in the
source but defined in a linker script as undefined.

Separately, in translate_symbol_table() the 16-bit symbol values were sign
extended to unsigned long (e.g., 64 bits) when they really should be treated as
unsigned so the value remains 16 bits.

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