[Bug binutils/18025] dwarf2 debug info after rebasing DLLs unusable

[jon.turney at dronecode dot org.uk]

https://sourceware.org/bugzilla/show_bug.cgi?id=18025

--- Comment #13 from Jon Turney <jon.turney at dronecode dot org.uk> ---
(In reply to Nick Clifton from comment #11)
> Have you tried using the latest binutils ?  We did make some improvements to
> line number caching recent.  (Although I think that this was with DWARF not
> STABS.  Darn).

Yes, I'm testing with binutils git master.

> Is there a way to reproduce this problem in a Linux environment ?  (I ask
> because it is much easier for me to debug and fix problems in this
> environment).
> I did try uploading a copy of libstdc++.a from old cygwin installation
> (based upon gcc 5.4.0) and then running "nm -l" on it with a newly built
> x86_64-pc-cygin toolchain.  It took 7 seconds to complete.  So there must be
> something that I am doing that does not match what you are doing.

I would think that binutils built to handle pe-i386 targets would show the same
behaviour on any host.

I've attached a tar file containing an unstripped x86 cygstdc++.dll.

For me, 'nm -l' on that is very slow, only managing to output a few symbols
per second.  Reverting 425bd9e1 makes it fast again.

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