Fwd: Fw: [Mingw-users] Whats the latest on libtool and the stub dlllibraries?

[Jason Tishler <jason at tishler dot net>]

Norman,

Please post instead of sending private email.

On Fri, Sep 27, 2002 at 10:53:26PM -0400, Norman Vine wrote:
> Is it the -mdll flag that is causing our dll relocation problems
> with the extension modules that are built with setup.py ???

No.  IMO, the above is not relevant to the Cygwin fork()/rebase issue.
Note that the "-mdll" flag is used when building Win32 Python shared
extension modules with Cygwin gcc in "-mno-cygwin" mode -- not when
building Cygwin Python shared extensions.

BTW, Cygwin fork() has rebase issues with Apache, Perl, etc. too.

On Sat, Sep 28, 2002 at 12:14:49AM -0400, Norman Vine wrote:
> and the following (3) modules had the remap error for cygssl.dll
> when run from inside the test-suite
>   test_fork1.py
>   test_popen2.py
>   test_pty.py
> but ran successfully when run directly

The above is the expected behavior.  When the entire Python regression
test is run, the probability of a DLL base address conflict is much
higher than when individual regression tests are run separately.

Jason

--- Begin Message ---

• From: Norman Vine <nhv at cape dot com>
• To: Jason Tishler <jason at tishler dot net>
• Date: Sat, 28 Sep 2002 00:14:49 -0400
• Subject: Fw: [Mingw-users] Whats the latest on libtool and the stub dlllibraries?
• Reply-to: Norman Vine <nhv at cape dot com>

Hi Jason

I just did a quick test compilng a ~month old CVS version
of Python after making the following change in distutills.cygwincompiler

        # Hard-code GCC because that's what this is all about.
        # XXX optimization, warnings etc. should be customizable.
        self.set_executables(compiler='gcc -mcygwin -O -Wall',
#                             compiler_so='gcc -mcygwin -mdll -O -Wall',
                             compiler_so='gcc -mcygwin -shared -O -Wall',
                             linker_exe='gcc -mcygwin',
#                             linker_so=('%s -mcygwin -mdll -static' %
                             linker_so=('%s -mcygwin -shared' %
                                        self.linker_dll))

and the following (3) modules had the remap error for cygssl.dll
when run from inside the test-suite
  test_fork1.py
  test_popen2.py
  test_pty.py
but ran successfully when run directly

HTH

Norman

< I actually changed all occurences of gcc in cygwincompiler to gcc-2
    in that I am using the 'beta' compiler >

----- Original Message -----
From: "Norman Vine" <nhv@cape.com>
To: "Jason Tishler" <jason@tishler.net>
Sent: Friday, September 27, 2002 10:53 PM
Subject: Fw: [Mingw-users] Whats the latest on libtool and the stub dll
libraries?


> Jason
>
> FYI
>
> from distutils.cygwinccompiler ~line 100
>
>         self.set_executables(compiler='gcc -mcygwin -O -Wall',
>                              compiler_so='gcc -mcygwin -mdll -O -Wall',
>                              linker_exe='gcc -mcygwin',
>                              linker_so=('%s -mcygwin -mdll -static' %
>                                         self.linker_dll))
>
> Is it the -mdll flag that is causing our dll relocation problems
> with the extension modules that are built with setup.py ???
>
> Norman
>
> ----- Original Message -----
> From: "Danny Smith" <dannysmith@clear.net.nz>
> To: "Elizabeth Barham" <soggytrousers@yahoo.com>
> Cc: <mingw-users@lists.sourceforge.net>
> Sent: Friday, September 27, 2002 10:39 PM
> Subject: Re: [Mingw-users] Whats the latest on libtool and the stub dll
> libraries?
>
>
> >
> > ----- Original Message -----
> > From: "Earnie Boyd" <earnie_boyd@yahoo.com>
> > To: "Elizabeth Barham" <soggytrousers@yahoo.com>
> > Cc: <mingw-users@lists.sourceforge.net>
> > Sent: Saturday, 28 September 2002 01:31
> > Subject: Re: [Mingw-users] Whats the latest on libtool and the stub dll
> > libraries?
> >
> >
> > > Elizabeth Barham wrote:
> > > >
> > > > Earnie Boyd <earnie_boyd@yahoo.com> writes:
> > > >
> > > > > I found the reason, and I must say Elizabeth did a nice job.
> > > >
> > > > Thanks, but.... it did not work on my copy of MSYS unfortunately.
> > When
> > > > building the dll, the -mdll was added onto the command line and gcc
> > > > errored out saying they were incompatible. Oh well.
> > > >
> > > Hmm...  I didn't get that at all.  Make sure you remove
> > > /etc/config.site.  As for -mdll, it may be useful on the object build.
> > > Danny Smith, can you speak to the -mdll switch effect in cc1?  The
> > > --help gives, "Generate code for a DLL".
> > >
> >
> > -mdll doesn't set any internal flags for cc1.exe, nor does -shared.
> >
> > -mdll tells driver to pass dllcrt2.o rather than crt2.o as startup
> > object to ld
> > and  to use  _DllMainCRTStartup@12 as entry point address.  -shared does
> > this too.
> >
> >
> >  -mdll passes --dll to ld. -shared passes -shared to ld. This is where
> > the difference is:
> >
> > --dll only says: 'use default image base for dlls'.  It doesn't  do any
> > of the relocateability magic.
> > -shared says: "build a relocateable dll (or more generally, a shareable
> > library)"  ie, do all the things that dllwrap/dlltool would do
> >
> > HTH.
> > Danny
> >
> >
> >
> >
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>

--- End Message ---

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