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[platform-swt-dev] Re: platform-swt-dev Digest, Vol 41, Issue 22 
Yolian Ignatov wrote:

Silenio,
Thanks for your prompt answer. I needed a bit of time to bring our macosx SWT build procedure in sync with the one outlined at http://www.eclipse.org/swt/jnigen.php
this route is actually really straightforward.. better than to try to replicate the SWT JNI coding pattern manually (I know... I tried to do it a few years ago.... :( )
Before we used the make_macosx.mak file that comes with macosx SWT. The produced binaries are identical however, so the problem lies somewhere else. 

I should emphasize that the problem is PPC specific, i.e. the libswt-pi-
carbon-xxx.jnilib fails to start on PPC machines running the latest version of Tiger. We are not using any Leopard specific API; we use GetDataBrowserItems, GetHandleSize, HLock, HUnlock, and DisposeHandle - all methods you guys already use. That's why we suspected that there's something in the way we [re]build the library that cases it to fail on PPC macs. Now that we follow the http://www.eclipse.org/swt/jnigen.php procedure that the SWT team uses as well, it gets even less obvious what the problem might be. If you think it might be of use, I could send you the exact changes we've made. It was quite an effort to get things to compile all the way through on mac os x. We used the latest versions of the various libraries and tools involved. I imagine you have the specifics e.g. recommended versions of those tools and libraries, would you be kind enough to share them e.g. should we build on Tiger vs. Leopard, do we need a specific version of Xcode, specific version of Mac OS X SDKs, etc.
been working on SWT source on Mac OS since tiger without ever thinking about which version of what I was using (ie. works out of the box using whatever latest flavor of XCode is). I am currently running Leopard and have even built Cairo 1.6 and built a GC version that uses it. all along never wandering about versions for anything (well except for Cairo dependancies, but that is Cairo). in other words, the SWT build process is really working. .. that said, I never test my code on PPC. 

cheers
I'd think that's something that'd be of general usefulness and merits a place on http://www.eclipse.org/swt/jnigen.php.
Unfortunately, and somewhat ironically, we just discovered that our Windows [re]build of the win32 swt library (swt-win32-3448.dll) fails to load on XP. Nothing changed in the way we build it using make_win32.mak, we upgraded the swt source from 3.4 M4 to the official 3.4 release. We now get and SWTError from the CoolBar saying ~'Item not found'. The same build runs fine on Vista. I wonder if a specific version of the Windows Common Controls is required, yet not enforced by the build procedure? Would you be kind enough to send us the recommended versions of the tools/SDKs/libraries required for building the Windows SWT with the windows build as well? 

Thanks,
Yolian

On Mon, 21 Jul 2008 12:00:12 -0400 (EDT), platform-swt-dev-request wrote

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Today's Topics:

   1. Re: libswt-pi-carbon-xxx.jnilib rebult on	Leopard	Intel
      doesn't work on Tiger PPC (Silenio Quarti)

----------------------------------------------------------------------

Message: 1
Date: Mon, 21 Jul 2008 10:22:27 -0400
From: Silenio Quarti <Silenio_Quarti@xxxxxxxxxx>
Subject: Re: [platform-swt-dev] libswt-pi-carbon-xxx.jnilib rebult on
	Leopard	Intel doesn't work on Tiger PPC
To: "Eclipse Platform SWT component developers list."
	<platform-swt-dev@xxxxxxxxxxx>
Message-ID:
	<OF0343520C.32971880-ON8525748D.004E1194-

8525748D.004ECC14@xxxxxxxxxx>

Content-Type: text/plain; charset="us-ascii"
What function are you trying to use? If the function is only available in Leopard, you have to load it dynamically and only call it using a version check. Use the JNIGeneratorAppUI tool from org.eclipse.swt.tools project to mark the function dynamic and generate the source of "os.c". See this page for some instructions: 

http://www.eclipse.org/swt/jnigen.php

Silenio
"Yolian Ignatov" <yolian@xxxxxxxxxxxx> Sent by: platform-swt-dev-bounces@xxxxxxxxxxx 
07/18/2008 12:55 PM
Please respond to
"Eclipse Platform SWT component developers list." <platform-swt-dev@xxxxxxxxxxx> 

To
platform-swt-dev@xxxxxxxxxxx
cc

Subject
[platform-swt-dev] libswt-pi-carbon-xxx.jnilib rebult on Leopard Intel doesn't work on Tiger PPC
In the context of the Eclipse plug-in org.eclipse.swt.carbon.macosx, I need to define a new native function in org.eclipse.swt.internal.carbon.OS
which will work on DataBrowser and which I will use then in org.eclipse.swt.widgets.Tree. 

1. I import the mentioned plug-in as source in my Eclipse workspace.
2. I declare my native function in org.eclipse.swt.internal.carbon.OS.
3. I provide the implementation and the other details in the respective os*.{c,h} files just like the other functions officially-defined functions.
4. Then I rebuild libswt-pi-carbon-xxx.jnilib on Leopard with Xcode 3.0 in the following way: 4.1. I change into the root of the org.eclipse.swt.carbon.macosx plug-in source tree in Terminal. 4.2. I execute "export MACOSX_DEPLOYMENT_TARGET=10.3". 4.3. Then I run "make -f make_macosx.mak libswt-pi-carbon-3448.jnilib" (the 3448 really depends on the SWT version with which I'm working).
The resulting library and the added function work as expected on Leopard Intel and Tiger Intel. It's part of an RCP product.
Unfortunately, another person trying to use the modified library on Tiger PPC (i.e. run the RCP product I provide) reports that it doesn't work. The added problem is that I cannot get more specifics.
Could you please advise as to what could the reason for the failure of the rebuilt library on Tiger PPC could be and how I should try to fix it? 

Thanks in advance,
Yolian
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--
Laurent Mihalkovic, co-author SWT/JFace in Action (www.manning.com/scarpino)

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