ld --auto-imports

[Robert Collins]

----- Original Message -----
From: "Ralf Habacker" <Ralf.Habacker@saght.tessag.com>
To: "Binutils" <binutils@sources.redhat.com>
Cc: "Robert Collins" <robert.collins@itdomain.com.au>
Sent: Monday, June 11, 2001 6:07 PM
Subject: AW: ld --auto-imports


> > > I have tried to mark this with ^^^^, but there are tabs in my
mail, so
> > they
> > > don't fit the correct columns.
> > >
> > > > However it works with -lcygwin first in the link line. Do you
know
> > why
> > > > that fixes it? Maybe more symbols need to be stripped... I'll
roll
> > my
> > > > own and have a look and see why -lcygwin is needed (it's not
needed
> > with
> > > > an unaltered ld).
> > > The reason is, that hello.dll uses _cygwin_dll_entry@12 from
greet.dll
> > and
> > > not from cygwin1.dll. This doesn't work, but I don't know why.
> >
> > Yes - I tracked that down just now myself :]. Use
> > -Wl,--exclude-symbols=_cygwin_dll_entry@12
> >  on the .dll link line, and you will no longer need -lcygwin in the
link
> > command.
> >
> > Thats fixed the segfaulting for me, and I'm back to libtool. I
suspect
> > that there are a number of symbols that will need to be excluded
from
> > automatic exporting, and I'll generate a patch to ld that will
include
> > Pauls' patch, and exclude those extra symbols.
>
> I have seens, that impure_ptr is although used in this way. Should
this be
> excluded too ? It seems, that is doesn't matter, but I'm not familiar
with
> the internal of cygwin1.dll
>
> Ralf
>

_cygwin_crt0_common@8
_cygwin_noncygwin_dll_entry@12
_fmode
_impure_ptr
cygwin_attach_dll
cygwin_premain0
cygwin_premain1
cygwin_premain2
cygwin_premain3
environ

are also candidates for not being automatically exported.

I haven't looked into this with any depth yet. Once I've got libtool
passing the entire test suite, I'll be looking at this part of it more.

Rob