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Message-ID: <3A2E5262.9413477D@ece.gatech.edu>
Date: Wed, 06 Dec 2000 09:51:14 -0500
From: "Charles S. Wilson" <cwilson AT ece DOT gatech DOT edu>
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To: "Steven O'Brien" <steven_obrien AT lineone DOT net>
CC: cygwin AT sources DOT redhat DOT com
Subject: Re: cygncurses++5.dll [WAS Re: building dlls, C and C++]
References: <000c01c05f8c$0b61e8c0$04288cd4 AT emerald>
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Very cool -- thanks.  I'll take a look at this over the weekend.

--Chuck


Steven O'Brien wrote:
> 
> The only outstanding issue from my previous mail on ncurses++ is the need to
> invent a main() function in the dll build which was not needed in the static
> build.
> 
> The c++ sources include a default main() (in c++/cursesmain.cc) which is
> linked into the static lib and therefore picked up by a static link, so no
> need for the application writer to provide one.
> 
> However, when the main() is put into a DLL, the linker can no longer find it
> when building an exe - hence the link error about WinMain AT 16. Modifying
> c++/Makefile so that c++/cursesmain.o is ommited fro the dll, but then added
> to the import library with ar, means that the shared build now works without
> an application main() just like the static build.
> 
> As far as I can tell, the runtime behaviour of c++/demo.exe is now identical
> whether linked shared or static. I attach a patch which includes all the
> mods I made doing these trials. It replaces
> CYGWIN-PATCHES/ncurses-5.2-c++-dll.patch. So to build ncurses, using dynamic
> linking, from the cygwin sources:
> 
> tar zxvf ncurses-5.2-2-src.tar.gz
> cd ncurses-5.2
> export CFLAGS=-DNCURSES_DLL
> export CXXFLAGS=$CFLAGS
>  ./configure --enable-symlinks --enable-sigwinch --enable-colorfgbg   \
>                     --enable-tcap-names --with-manpage-symlinks --without-de
> bug   \
>                     --with-normal --disable-termcap --prefix=/usr  \
>                     --with-default-terminfo-dir=/usr/share/terminfo   \
>                     --enable-echo --with-manpage-symlinks
> patch -p1 < CYGWIN-PATCHES/ncurses-5.2-2-dll.patch
> patch -p1 < ncurses-5.2-c++-dll-2.patch
> make
> 
> In the above, replace "ncurses-5.2-c++-dll-2.patch" with the path where you
> have placed (and unzipped) the attached patch file.
> 
> Steve
> 
>   ------------------------------------------------------------------------
>                                      Name: ncurses-5.2-c++-dll-2.patch.gz
>    ncurses-5.2-c++-dll-2.patch.gz    Type: application/x-unknown-content-type-patch_auto_file
>                                  Encoding: base64
> 
>   ------------------------------------------------------------------------
> --
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