Linux 64bits bug on libudev

[Laurent Bourdette]

hello,
On Linux 64 bits a bug due to differences between 32/64 on libudev
can be corrected "by hand" but need to be corrected in library ...

Thank's for your very good job, I continue to evaluate the library.
Laurent Bourdette from France.


./build-and-run.sh
Executing FindPorts application
Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/scm_tuartx1/linux_1.0.4_x86_64.so: libudev.so.0: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type = ( can't open, file not found )
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1938)
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1821)
    at java.lang.Runtime.load0(Runtime.java:809)
    at java.lang.System.load(System.java:1086)
    at com.embeddedunveiled.serial.internal.SerialComPortJNIBridge.loadNativeLibrary(SerialComPortJNIBridge.java:252)
    at com.embeddedunveiled.serial.SerialComManager.<init>(SerialComManager.java:469)
    at FindPorts.main(FindPorts.java:25)

Explanation of the problem :

>For 64-bit Ubuntu, it is in the 32-bit libudev0 package.

>You can install that with the following command:

>sudo apt-get install libudev0:i386

>This package was removed from Ubuntu in 14.04.

More explanation and solving :
http://askubuntu.com/questions/288821/how-do-i-resolve-a-cannot-open-shared-object-file-libudev-so-0-error


The ( bad ) solution :

sudo ln -sf /lib/$(arch)-linux-gnu/libudev.so.1 /lib/$(arch)-linux-gnu/libudev.so.0

After, work fine.
 ./build-and-run.sh
Executing FindPorts application
/dev/console
/dev/ptmx
/dev/pts/0
/dev/pts/1
/dev/pts/ptmx
/dev/tty

[rishi gupta]

Hi Laurent, Thanks for details. Here is the dependency SCM have on other libraries.

# ldd linux_1.0.4_x86.so 

linux-gate.so.1 =>  (0xf7729000)

libudev.so.0 => /lib/i386-linux-gnu/libudev.so.0 (0xf767b000)

libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf74d2000)

librt.so.1 => /lib/i386-linux-gnu/librt.so.1 (0xf74c8000)

/lib/ld-linux.so.2 (0xf772a000)

libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf74ad000)

# ldd linux_1.0.4_x86_64.so

linux-vdso.so.1 =>  (0x00007fff081fe000)

libudev.so.0 => /lib/x86_64-linux-gnu/libudev.so.0 (0x00007f51715c9000)

libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f517120b000)

librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f5171002000)

/lib64/ld-linux-x86-64.so.2 (0x00007f5171a8d000)

libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f5170de5000)

I use 12.04 because I need it to build android. I am fully aware of 32/64 bit udev.

For 32 bit on ubuntu 12.04

sudo apt-get install libudev0:i386

sudo apt-get install libudev-dev:i386

For 64 bit on ubuntu 12.04

sudo apt-get install libudev-dev

For embedded linux

libudev.so.1

Please explain a bit how this can be solved in library itself. Different Linux distro uses different packges.

I planned to add support for systemd daemon but have to wait until ubuntu 12.06 is released in April 2016 :)

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