missing package.txt

[dromer]

I'm trying to build this external under linux. It's my first time using flext and it seems to be needing a 'package.txt' with configuration.

Since I do not have any experience with this could you perhaps provide one (at least as example) in the repo?

regards, dromer

[dromer]

Ok, figured it out and was rather trivial. Compiling it was a little more work. Here is what I did:

package.txt

NAME=leapmotion
SRCDIR=.
SRCS=main.cpp Dispatcher.cpp

And to compile with flext:

LDFLAGS='-L../../leapmotion/Leap_Dev_Kit_0.7.9_3461/LeapSDK/lib/x86 -lLeap' CPLUS_INCLUDE_PATH=../../leapmotion/Leap_Dev_Kit_0.7.9_3461/LeapSDK/include bash ../flext/build.sh pd gcc

Now trying to figure out how it works, would be nice to set up a leapmotion-help.pd that shows some of the basics. If you have any comments, please don't hesitate to mention ;)

[jmmmp]

Hi,

I just installed leapmotion in my ubuntu 12.04. Could you tell me the steps necessary to compile there?

Thanks,

jmmmp

[dromer]

The exact steps are right there in my previous post.

First you install flext. Then you make a file 'package.txt' containing what I already showed. Then you run the line I put after this.

You have to make sure that all the paths are correct of course. Then you end up with a 'leapmotion.pd_linux' external that you put in the path of puredata to load.

[jmmmp]

Thanks. It worked with the compiling, but the external doesn't load. I get the message "load_object: Symbol "leapmotion_setup" not found". I compiled it in ubuntu 12.04 32b (under xfce). Besides that, the leapmotion seems to be working in my system.

[dromer]

Ok, I haven't tried it with the latest dev-kit, but my object was built with the version in my previous post and still works with the new API. (although I haven't had much time to play with it).

I really don't have time now, but next week I'll try compiling against the new sdk.

[jmmmp]

Ok. Could you send me your binary meanwhile? That would be great. My mail is jmmmpais at googlemail dot com.

[dromer]

http://mrtoasted.com/~dreamer/leapmotion.pd_linux

Not guaranteed, since I don't run Ubuntu ;)

[jmmmp]

Thanks. I got the line "/home/jmmmp/software/Pd_leapmotion_0.1/leapmotion.pd_linux: libLeap.so: cannot open shared object file: No such file or directory", even though I copied the .so file to the same folder of your binary. But strangely, I noticed that your file is ~200K big, and mine was only 5K. I guess the different distros might not be an enough reason for the different sizes? Or I'll just wait until you can try the latest sdk. I really don't know anything of programming, besides following instructions someone else wrote down.

[dromer]

I just followed the instructions that I found as well. Plus a little bit of tinkering perhaps ..

I haven't installed the SDK so I have to preload the library like this:

LD_PRELOAD=/<path-to>/Leap_Dev_Kit_0.7.9_3461/LeapSDK/lib/x86/libLeap.so pdextended

Check if this works for you.

Also, I am pretty sure you compiled the external wrong. Make sure to check the paths to the dependencies, the example was on my system.

[jmmmp]

Eh eh. A new error appears. Unless there are other steps you took to make the external work, it might be better to fix this at compiling level. /home/jmmmp/software/Pd_leapmotion_0.1/leapmotion.pd_linux: /home/jmmmp/software/Pd_leapmotion_0.1/leapmotion.pd_linux: undefined symbol: _ZN17flext_root_singlenwEj

About the compilation: I don't get any errors in the terminal, and all the paths are correct (tested them with ls). Here is the console output:

jmmmp@jmmmp-x61s:~/software/Pd_leapmotion_0.1$ LDFLAGS='-L../Leap_Developer_Kit_0.8.0_5302_Linux/LeapSDK/lib/x86 -lLeap' CPLUS_INCLUDE_PATH=../Leap_Developer_Kit_0.8.0_5302_Linux/LeapSDK/include bash ../flext/build.sh pd gcc make -f ../flext/buildsys/gnumake-sub.mak PLATFORM=lnx RTSYS=pd COMPILER=gcc BUILDPATH=../flext/buildsys/ PKGINFO=package.txt BUILDCLASS=ext TARGETMODE=release TARGETTYPE=single build make[1]: Betrete Verzeichnis '/home/jmmmp/software/Pd_leapmotion_0.1' mkdir -p pd-linux/release-single mkdir -p pd-linux/release-single/ g++ -c -msse -mfpmath=sse -ffast-math -DFLEXT_USE_CMEM -O3 -march=pentium4 -pthread -fPIC -fvisibility-inlines-hidden -DNDEBUG -DFLEXT_SYS=2 -DPD -I/usr//src -I/usr//include -I/usr//include/pd -I/usr/local/include/stk -I/usr/local/include/sndobj -I/usr/local/include/flext main.cpp -o pd-linux/release-single/main.opp mkdir -p pd-linux/release-single/ g++ -c -msse -mfpmath=sse -ffast-math -DFLEXT_USE_CMEM -O3 -march=pentium4 -pthread -fPIC -fvisibility-inlines-hidden -DNDEBUG -DFLEXT_SYS=2 -DPD -I/usr//src -I/usr//include -I/usr//include/pd -I/usr/local/include/stk -I/usr/local/include/sndobj -I/usr/local/include/flext Dispatcher.cpp -o pd-linux/release-single/Dispatcher.opp g++ -L../Leap_Developer_Kit_0.8.0_5302_Linux/LeapSDK/lib/x86 -lLeap -pthread -shared -Wl,-S -L/usr//bin -L/usr/local/lib -o pd-linux/release-single/leapmotion.pd_linux pd-linux/release-single/main.opp pd-linux/release-single/Dispatcher.opp -lflext-pd_s chmod 755 pd-linux/release-single/leapmotion.pd_linux strip --strip-unneeded pd-linux/release-single/leapmotion.pd_linux make[1]: Verlasse Verzeichnis '/home/jmmmp/software/Pd_leapmotion_0.1'

And it creates the pd-linux/release-single folder, with the files Dispatcher.opp, main.opp and the external (again with only 5Kb size).

[agitato816]

Hey jmmmp,

$ sudo LD_PRELOAD=path/to/folder/libLeap.so pd

I compiled it for Ubuntu 12.04(32bit) https://drive.google.com/folderview?id=0B42bn7ncw918RUVWWFFtZVZpVEE&usp=sharing

My blog, sorry it's written in korean, but it helps you. http://jonghyunkim816.blogspot.de/2013/12/compiling-leapmotionpdlinux-on-ubuntu.html

[mxa]

using that provided binary gives me: leapmotion.pd_linux: wrong ELF class: ELFCLASS32

[dromer]

^ you are trying to run a 32 bit binary on a 64 bit system.

Just compile it yourself, works fine with the latest SDK.

Also don't forget the help-patch included with the mac-zip here: http://puredatajapan.info/?page_id=1514

[mxa]

thanks - struggling with flext 64bit at the moment.