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Message-ID: <001f01c05ea0$9f54ffa0$65308cd4@emerald>
From: "Steven O'Brien" <steven_obrien AT lineone DOT net>
To: <cygwin AT cygwin DOT com>
References: <001401c05df0$e4dd0c80$95698cd4 AT emerald> <3A2BB6BB DOT 4353B8D4 AT ece DOT gatech DOT edu>
Subject: Re: building dlls, C and C++
Date: Tue, 5 Dec 2000 09:47:28 -0000
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Thanks for the examples, Chuck. I think  I now understand why the ncurses++
dll fails to build corrrectly. The bug in egcs that Mumit refers to in the
c++ example appears to still exist in gcc-2.95.2. To build cygncurses++5.dll
and c++/demo.exe, the following mods are necessary:

1) the gcc bug - static *data* members do not pick up the "NCURSES_IMPEXP"
decoration correctly from the class declaration, so you have to add this
explicitly. (see dllclass.h in the dllhelpers pack  you attached for an
example) Files affected:
  c++/cursesapp.h
  c++/cursesf.h
  c++/cursesp.h
  c++/cursesw.h
  c++/cursslk.h

2) main() function - A correct main() for this example would be:
    int main() { return Demo(); }

3) remove the #defines in c++/etip.h.in that force definition of
NCURSES_STATIC

with these changes, then the instructions in ncurses-5.2-2-src.tar.gz
produce a working cygncurses++5.dll and c++/demo.exe

Steve

----- Original Message -----
From: Charles S. Wilson <cwilson AT ece DOT gatech DOT edu>
To: Steven O'Brien <steven_obrien AT lineone DOT net>
Cc: <cygwin AT cygwin DOT com>
Sent: Monday, December 04, 2000 3:22 PM
Subject: Re: building dlls, C and C++


> I don't see this problem.  Here's an example, cooked up from Mumit's
> outdated dllhelpers kit, but redone to fit the more recent ld/gcc
> combinations and their capabilities.
>
> --Chuck


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