webstart with nativelibs

[emzic]

hello, when i look at some webstart files, i see that they use something called nativelib. these jars seem to contain just the nativelibraries (dlls, so, ...)

example:

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<resources os="Linux">       <nativelib href="lwjgl-native.jar"/>    </resources>        <resources os="Windows">       <nativelib href="lwjgl-native.jar"/>    </resources>    <resources os="Mac OS X">       <nativelib href="lwjgl-native.jar"/>      </resources>

my questions is: how do you create these nativelib-jars? is there an ant task for this?

thanks!

[broumbroum]

of course, native .jar are are common packages that may be built using jar command or ant <jar> tasks.
Those jar have to be signed with the same certificate (same person) as the main .jar that holds your jnlp app.
One single rule is necessary : all native libs must be found on the / root path of the .jar.
e.g.

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- myNative.jar      - META-INF/          + Manifest      - myJNINativeLib.dll|jnilib|dylib|so      - anotherJNINativeLib.dll|jnilib|dylib|so      - myPackage/        + myClass.class      -...

[Nate]

They are just zip files containing the native libs named as ".jar". My native lib JARs don't even contain a META-INF folder.

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[emzic]

thank you!

one more question: how do i differentiate between 32bit and 64bit natives in the jnlp file?

[Nate]

You don't, only by OS. Put both 32 and 64 bit libs in the JAR for each OS.

[emzic]

thanks.

(although i dont like this, cause it makes the users download stuff that they dont gonna need)

[gouessej]

Use "arch" value:
http://lopica.sourceforge.net/os.html
If it is amd64 or x86_64, use 64-bits natives, otherwise use 32-bits natives. I don't know if you wish to support ppc, sparc, sparcv9, etc...

However, the default JNLP file of LWJGL does not do this distinction and it works fine.