Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin AT sources DOT redhat DOT com
Message-ID: <035301c10410$41c67ec0$806410ac@local>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: "Julian Hall" <jules AT acris DOT co DOT uk>, <cygwin AT cygwin DOT com>, <java AT gcc DOT gnu DOT org>
References: <3B421165 DOT 1D114955 AT acris DOT co DOT uk>
Subject: Re: Compiling libgjc under cygwin
Date: Wed, 4 Jul 2001 08:33:59 +1000
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 5.50.4522.1200
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200
X-OriginalArrivalTime: 03 Jul 2001 22:21:26.0944 (UTC) FILETIME=[802B0200:01C1040E]


----- Original Message -----
From: "Julian Hall" <jules AT acris DOT co DOT uk>
To: <cygwin AT cygwin DOT com>; <java AT gcc DOT gnu DOT org>
Sent: Wednesday, July 04, 2001 4:39 AM
Subject: Compiling libgjc under cygwin


> Hi; I know that for the moment this is unsupported but I'm trying to get
> libgjc from the gcc-3.0 distribution to compile in a cygwin environment.

What target do you have (win32/mingw | cygwin | unix*) ?

> I've figured out the following:
>
> - I've looked at win32-threads.cc and the threads porting documentation,
> and guess from the looks of it that it should work OK as distributed (?)

Ah, no. Cygwin != win32. On cygwin, to ensure that fork() and fork()
dependant calls work properly I strongly recommend the use of pthreads. Some
serious bugs and have been corrected recently so they should :} be working
fine. Speed wise they are now comparable to the win32-pthreads library.

win32 threads _may_ work, but no guarantees.

> - I modified configure so that it would recognise gcc's win32 thread
> model and choose win32-threads.cc
> - The resulting makefile had java.awt packages that failed to compile,
> so I simply removed all of the awt and related sources.  I think the
> compilation errors here were due to the case-insensitivity of the file
> system: they were effectively errors about duplicate class definitions
> in (eg) image.java and Image.java.

There were patches posted by me and another cygwinner whose name escapes me
(sorry!) about 4-5 months ago. Search for cygwin in the java list archives.
I go the filename issues fixed at that point. Unfortunately the patches
weren't really ready for integration - they would likely have destabilised
unix platforms. Some enthusatic cygwin + java person probably needs to hop
on and stay on the java list.

> - java/util/natGregorianCalendar.cc wasn't compiling correctly; I had to
> forcibly undefine HAVE_TIMEZONE to persuade it to work, as the
> definition of 'timezone' it used was incompatible with the cygwin
> definition.

There are patches that dont' require breaking unix for this.

> - Fastjar required patching in order to function correctly; the patch I
> applied is attached, and simply causes files to be opened with the
> O_BINARY flag if it is defined.

I don't think we had tackled that (bin mounts were used) - thanks for the
patches.

> However, I am still faced with compile errors when it comes to linking
> the utilitty programs that are part of the library; the errors
> specifically are:
>
> ./.libs/libgcj.a(natClass.o): In function `ZN4java4lang5Class4sizeEv':
>
/usr/local/src/gcc-cygwin-w32threads/i686-pc-cygwin/libjava/../../../gcc-3.0
/libjava/java/lang/Class.h(.text$_ZN4java4lang5ClassC1Ev+0x0):
> multiple definition of `java::lang::Class::Class()'

This looks like the case sensivity thing we already squashed. Try looking up
our old patches.

Rob


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/