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From: Ismail Donmez <ismail AT i10z DOT com>
Date: Tue, 7 Jun 2016 19:23:24 +0300
Message-ID: <CAFo71_6UOvDv2eNRWVix96iJDXw3+bXg1CxoMe-WRxFy8+aXyQ@mail.gmail.com>
Subject: Re: nm for .exe extensions?
To: cygwin AT cygwin DOT com
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Hi,

On Tue, Jun 7, 2016 at 7:12 PM, Corinna Vinschen
<corinna-cygwin AT cygwin DOT com> wrote:
> On Jun  7 08:43, Bill Smith wrote:
>> Warren Young-2 wrote
>> > On May 24, 2016, at 6:43 AM, Benjamin Cao &lt;
>>
>> > becao@
>>
>> > &gt; wrote:
>> >>
>> >> The executable, when run with nm in Cygwin, results in a "no symbols"
>> >> result, whereas it generates a symbol table in unix.
>> >
>> > That’s not what I see here.  Given hello.c containing a “Hello, world!”
>> > program:
>> >
>> >   $ make hello
>> >   cc     hello.c   -o hello
>> >   $ nm hello.exe | wc -l
>> >   389
>> >
>> > If I strip the exe, I get “No symbols,” as expected.  There’s no reason a
>> > finished executable should have much in the way of exported symbols
>> > without debug info, since it is self-contained.  You would only expect to
>> > get useful output from nm on a stripped binary if it’s an object file or a
>> > DLL.
>>
>> Hi, I'm picking this issue up from my colleague, Ben Cao.  We're using
>> Visual Studio C++ to compile the executables/objects.  Is the issue that
>> Visual Studio places the information in the .pdb file?  That's why nm
>> doesn't display any info on an *.exe ?
>
> PDB is an undocumented and potentially patent-encumbered format, that's
> why the binutils tools can't read or write it.

This will hopefully be no longer true in the future:
https://github.com/Microsoft/microsoft-pdb

ismail

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