[yocto] prelink-cross with -fno-plt

[Shane Peelar]

Hi Everyone @ the Yocto project,

I'm Shane Peelar, a PhD Candidate at the University of Windsor.
I'm writing to you about prelink-cross, as part of the Yocto project.
Specifically, I'm looking at using it with executables built using
`-fno-plt` under GCC.
I wasn't quite sure where to send this email to, so I figured I'd try
here.  If there's a better place to send this, please let me know.

Right now, prelink-cross seems to fail an assertion in arch-x86_64.c, line
421, when
using it with an executable built with `-fno-plt`:

...
assert (i < dso->ehdr.e_shnum)
...

This snippet seems to be looking for the ".plt" section and, since it can't
find it, the assertion fires.  This makes sense because in `-fno-plt`
executables, the `.plt` section is missing entirely.
I'm not an expert on ELF stuff, although I am learning quickly.  It looks
like
this code wants to write into GOT[1] the address of ".plt" + 0x16 -- since
".plt" doesn't
exist, does it make sense to just change this assert to an if statement
like so:

...
      if (i < dso->ehdr.e_shnum)
      { ... }
...

and skip over that part?  Or is this a real error condition for
prelink-cross and it really should not continue?  The executable in
question is also non-PIE, if that makes a difference.

Thanks for your time,
Shane
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