Hi,

this is most likely because ant4eclipse doesn't detect your eclipse 
platform environment correctly.

In Eclipse the runtime environment is configured with some osgi.* 
properties (as osgi.ws for the window system, osgi.os for your operating 
system etc). Normally, when you launch Eclipse, those properties are set 
automatically, matching perfectly with your operating system, your 
window system and so on. If those properties are *not* specified, 
Equinox tryes to "guess" them (for example by interpreting the java 
"os.name" system property). This "guessing" is used by ant4eclipse as 
well, and in your case the guess is probably wrong.

(See 
http://help.eclipse.org/ganymede/index.jsp?topic=/org.eclipse.platform.doc.isv/reference/misc/runtime-options.html
 
for a reference of the configuration options)

The properties ant4eclipse uses when it tries to resolve the plug-in 
dependencies, are written to the log - search for "Initializing 
TargetPlatform with properties". Most probably the properties doesn't 
match the "Eclipse-PlatformFilter" specified in the Manifest of the 
launcher.gtk.linux.x86-plug-in.

To set this properties explizitly set the following three properties 
using the ANT_OPTS environment variable before launching ant:

export ANT_OPTS=-Dosgi.ws=gtk -Dosgi.os=linux -Dosgi.arch=x86

Please let me know if it helps!

Regards,
Nils




Oleg Mikheev schrieb:
> I'm trying to build an Eclipse plugin with ant4eclipse 0.5.0-RC1
> and Eclipse PDE 3.4
> This is what I get:
> 
> ERROR - [ERROR] firstplugin/actions/SampleAction.java#35: The type 
> org.eclipse.swt.widgets.Shell cannot be resolved. It is indirectly 
> referenced from required .class files
> 
> The main cause is inability to match platform filter.
> There are lots of messages like this one:
> 
> WARN - Could not resolve 
> 'org.eclipse.equinox.launcher.gtk.linux.x86_1.0.100.v20080606@/usr/local/eclipse_pde/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.0.100.v20080606':
> WARN -   Platform filter did not match: (& (osgi.ws=gtk) (osgi.os=linux) 
> (osgi.arch=x86))
> WARN -   Missing Constraint: Fragment-Host: 
> org.eclipse.equinox.launcher; bundle-version="[1.0.0,1.1.0)"
> 
> 
> I don't understand how come platform doesn't match?
> This is my simple build.xml:
> 
> <project name="FirstPlugin">
>       <taskdef resource="net/sf/ant4eclipse/antlib.xml"/>
>       <property name="build.workspace" location="${basedir}/../"/>
>       <property name="build.dest" location="/tmp/q/"/>
>       <property name="plugin.id" value="FirstPlugin"/>
>       <property name="ant4eclipse.trace" value="true"/>
> 
>       <targetPlatform id="eclipse-32">
>               <location dir="/usr/local/eclipse_pde"/>
>       </targetPlatform>
> 
>       <target name="build-plugin">
>               <buildPlugin destDir="${build.dest}" projectName="${plugin.id}" 
> workspace="${build.workspace}"
>                               packageasjar="true">
>                       <eclipselibrarycompiler />
>                       <targetplatform refid="eclipse-32"/>
>               </buildPlugin>
>       </target>
> 
> </project>
> 
> 
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