[resolved] Problem with liblwjgl.so in Eclipse

[Satscape]

I posted this on someone else's thread http://www.minecraftforge.net/forum/index.php/topic,9148.0.html, but they've [resolved] theirs, I have not, so.....

 

Hello, I'm getting this same issue, yesterday it was working fine, today not so much, running Mint Linux 15 64 bit

In Eclipse I get:

 

Caused by: java.lang.UnsatisfiedLinkError: /media/scott/Stuff/Java Source code/forge/mcp/jars/versions/1.6.2/1.6.2-natives/liblwjgl.so: /media/scott/Stuff/Java Source code/forge/mcp/jars/versions/1.6.2/1.6.2-natives/liblwjgl.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)

 

Reinstalled Eclipse, deleted my forge installation and done a clean ./install.sh of it.

 

Downloaded lwjgl, the zip contains exactly the same files I already have in forge/mcp/jar/versions/1.6.2/1.6.2-natives

 

From the error, it looks like it's using the 32-bit liblwjgl.so instead of liblwjgl64.so (which is in this folder), so how would I tell it to load the 64 bit one?

 

Also, tried stepping through the code where it loads the library and...

String library_path = System.getProperty("org.lwjgl.librarypath");

 

is getting a NULL, is that the problem? and if so, how would I fix that.

 

My next step is re-install Linux. :-O I'd rather not do that.

 

[luacs1998]

Try overwriting liblwjgl.so with liblwjgl64.so?

[LexManos]

Interesting it should pick the one based off your architecture.

You can try deleting the 32-bit version and seeing if it detects the 64.

Either way that env varible shouldnt be null.

We have the launch configurations that set that value.

[Satscape]

 

Removing "liblwjgl.so" - says java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path -

(liblwjgl64.so is definitely in there)

 

Renaming liblwjgl64.so to liblwjgl.so I get:

...liblwjgl.so: failed to map segment from shared object: Operation not permitted

 

I've switched back to my Windows pc for now, I'll take another look at this when I have time, thanks for your suggestions. One last thing, should I be using OracleJDK or OpenJDK...or do they both play well with Eclipse?...or is there some heated debate about which one is best? 

[ianc1215]

I had a similar problem when trying to just run minecraft.

 

You have to export the location of the java library files so minecraft(forge) can find them.

 

Here is what I did and it work(s/ed).

 

Open a terminal (not root / sudo) and type:

export LD_LIBRARY_PATH="/opt/java/jre/lib/amd64"

 

or change to i386 for 32-bit. Assuming this is where you java is installed. I personally use Oracle Java on Linux.

[Satscape]

Thanks for that, but still no luck. I did see something like that while googling, looks like it does fix Minecraft starting up, but no effect inside Eclipse.

 

Going to re-install linux this weekend, as it used to work, I must have done something to upset it :-(

 

UPDATE: Re-installed Linux, all is well again. Just wish I knew what it was that I did to break it, so I don't do it again! :-)