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X-HELO:	calimero.vinschen.de
Date:	Tue, 7 Jun 2016 18:12:21 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: nm for .exe extensions?
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On Jun  7 08:43, Bill Smith wrote:
> Warren Young-2 wrote
> > On May 24, 2016, at 6:43 AM, Benjamin Cao <
>=20
> > becao@
>=20
> > > wrote:
> >>=20
> >> The executable, when run with nm in Cygwin, results in a "no symbols"
> >> result, whereas it generates a symbol table in unix.
> >=20
> > That=E2=80=99s not what I see here.  Given hello.c containing a =E2=80=
=9CHello, world!=E2=80=9D
> > program:
> >=20
> >   $ make hello
> >   cc     hello.c   -o hello
> >   $ nm hello.exe | wc -l
> >   389
> >=20
> > If I strip the exe, I get =E2=80=9CNo symbols,=E2=80=9D as expected.  T=
here=E2=80=99s 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=E2=80=99s an objec=
t file or a
> > DLL.
>=20
> 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.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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