Raspberry Pi Forums

Hello! I'm using Raspberry Pi B+ with Raspbian on board. I want to install library libftd2xx 1.1.12. I already compiled that (http://www.ftdichip.com/Support/Documen ... nux%20.pdf) but when I wan to execute some example I get the error like "error while loading shared libraries: libftd2xx.so: cannot open shared object file: No such file or directory". I put the same symlink in other directories according to files in /etc/ld.so.conf.d". I changed also "LD_LIBRARY_PATH" to "/usr/local/lib". I saw similar topic but there was no solution. Have some ideas?

After you update /etc/ld.so.conf.d you MUST run depmod -a to ensure all the library info is built into the system files. It's not good enough to just reboot, you may need to do that after running depmod.

DougieLawson wrote:After you update /etc/ld.so.conf.d you MUST run depmod -a to ensure all the library info is built into the system files. It's not good enough to just reboot, you may need to do that after running depmod.

I didn't change nothing in /etc/ld.so.conf.d". I mean I checked what directories with libraries are written there and then I made symlinks accordingly.

If you add any new library or symlink to a library run depmod.

DougieLawson wrote:If you add any new library or symlink to a library run depmod.

I think you've confused depmod (which rebuilds the kernel module dependency tables) and ldconfig (which rebuilds the system library tables).

There's no kernel modules involved here, so sudo ldconfig should be run.

rpdom wrote:

DougieLawson wrote:If you add any new library or symlink to a library run depmod.

I think you've confused depmod (which rebuilds the kernel module dependency tables) and ldconfig (which rebuilds the system library tables).

There's no kernel modules involved here, so sudo ldconfig should be run.

I was puting "ldconfig" usually always after some changes in library paths.

Have you followed the instructions here: http://www.ftdichip.com/Drivers/D2XX/Li ... -linux.txt

DougieLawson wrote:Have you followed the instructions here: http://www.ftdichip.com/Drivers/D2XX/Li ... -linux.txt

I wrote in the first post I did it.

Then you'll need to ask FTDI for support.

DougieLawson wrote:Then you'll need to ask FTDI for support.

But I don't think it's a problem with device. It's a problem with OS.

seprob wrote:

DougieLawson wrote:Then you'll need to ask FTDI for support.

But I don't think it's a problem with device. It's a problem with OS.

It's their library code that you're trying to install.

DougieLawson wrote:

seprob wrote:

DougieLawson wrote:Then you'll need to ask FTDI for support.

But I don't think it's a problem with device. It's a problem with OS.

It's their library code that you're trying to install.

But when I want to execute the program it doesn't see the shared object.

Go and ask the people who wrote the code. Because there's no other way to get this thing to work.

DougieLawson wrote:Go and ask the people who wrote the code. Because there's no other way to get this thing to work.

I am so surprised but it helped. They send me back correct files (libftd2xx.so.1.1.12 and libftd2xx.a) and I replaced them and then everything went good.

Who did you ask for the libftd2xx.so.1.1.12 and libftd2xx.a from, FTDI?
I've encountered the same problem and do not know where to go.
Thanks very much in advance,
Jason