Odroid C1+ - missing pthreads

[mjbogusz]

Hi,
Sorry to miss use this project, but i could not find a issues option in your wiringPi project.

I have odroid C1+ and i want to connect a VL6180X Time-of-Flight Distance sensor.
I was very pleased to find your project.
The odroid has Ubuntu OS.
I downloaden the wiringPI and want to compile it but i get an error.
It misses pthreads if i understand correctly, could you help me ?

Regard,
Peter

Copied from mjbogusz/rapp-elektron-cupholder issue#1
by @Bodata

[mjbogusz]

Can you post complete compilation log here? (Just remember to put it in triple backticks).
And, just to make things clearer, paste also results of following commands:
cmake --version
gcc --version
lsb_release -a

Also a quick search through the internet suggest that to install pthreads on Ubuntu you could try the following command:
apt-get install libpthread-stubs0-dev
but I'd be honestly surprised if you didn't have that package already.

[Bodata]

Hi,

In reponse of you the following:

1. when i run "cmake .." i get:

/build$ cmake ..
CMake Error at CMakeCPack.cmake:42 (message):
Unrecognized processor architecture! Want it added? Create a pull request.
Call Stack (most recent call first):
CMakeLists.txt:21 (include)

-- Configuring incomplete, errors occurred!
See also "/home/odroid/wiringPi-master/build/CMakeFiles/CMakeOutput.log".
See also "/home/odroid/wiringPi-master/build/CMakeFiles/CMakeError.log".

2. When i look into the /home/odroid/wiringPi-master/build/CMakeFiles/CMakeError.log

/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec359680296.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create CMakeFiles/cmTryCompileExec359680296.dir/CheckFunctionExists.c.o -o cmTryCompileExec359680296 -rdynamic -lpthreads
/usr/bin/ld.bfd.real: cannot find -lpthreads
collect2: error: ld returned 1 exit status
make[1]: Leaving directory `/home/odroid/wiringPi-master/build/CMakeFiles/CMakeTmp'
make[1]: *** [cmTryCompileExec359680296] Error 1
make: *** [cmTryCompileExec359680296/fast] Error 2

Only copied the end of this file

3. versions

cmake version 2.8.12.2

gcc-4.9.real (Ubuntu/Linaro 4.9.2-0ubuntu1~14.04) 4.9.2
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.5 LTS
Release: 14.04
Codename: trusty

Does this explain the problem ?

Regards,
Peter

[mjbogusz]

The real error is the one printed by cmake in the beggining:

CMake Error at CMakeCPack.cmake:42 (message):
Unrecognized processor architecture! Want it added? Create a pull request.

The processor is recognized by running uname -m and for Odroid C1+ it should be armhf, but it seems it is not.
Could you paste results of running uname -m?

The pthreads error is, as far as I understand, just cmake checking which implementation is available.

PS. When including logs, code etc it's best to put it into backticks or triple backticks for better readability.

[Bodata]

Hi,

uname -m gives
armv7l

[mjbogusz]

Okay, I've fixed the bug in architecture recognition. Seems that uname -m can report various things for the same architecture, in this case it was the difference between armhf and arm7l.

Try building the git version now.

[mjbogusz]

Did it build properly? If so I'll push a new version with that fix.

[Bodata]

Sorry yesterday kingsday... so we have a day off.

I removed the directory wiringPi-master, downloaded the the zip file, extraced it.
Still get the exactly the same error.

I see you edited but you made arm7l should be armv7l (you missed the "v")

Regards,
Peter

[mjbogusz]

Indeed, should be fixed now.
Unfortunately, I have no ARMv7 board to test the code...

Try cloning the repo to your computer with
git clone https://github.com/mjbogusz/wiringPi.git (it will automatically create wiringPi directory), this way to update you have just to do git pull instead of re-downloading whole thing.

[Bodata]

Ok it is working.
With the installation i got an other problem

sudo dpkg -i wiringpi-odroid-*.deb

dpkg: error processing archive wiringpi-odroid-2.42.2-armhf.deb (--install):
 trying to overwrite '/usr/lib/libwiringPi.so', which is also in package wiringpi 20150113-c34db11-9

So i did a

sudo apt-get purge wiringpi

It removed the old wiringpi then i could install your wiringpi.

[mjbogusz]

It would mean that package conflickts are not parsed properly too, my fork conflicts with original wiringPi but dpkg should tell that explicitly. I'll look into that.

[Bodata]

It is no problem for me, the C1+ is out of the box, i did not install the wiringPi as far is i know.
Do you expect any problems because of the removal of the original wiringPi ?

[mjbogusz]

No, this one replaces and extends it only.
However I'm not sure what was the version of wiringPi was installed originally - I'd presume it was Hardkernel's version which was around 2.0, while my fork is at 2.42. It shouldn't introduce any breaking changes though.

[Bodata]

Hi,
Did not want to make an new issue in your vl5310x but i have the same problem

vl53l0x-linux-master/build$ cmake ..
-- Using system WiringPi library
CMake Error at cmake_modules/CPack.cmake:39 (message):
  Unrecognized processor architecture! Want it added? Create a pull request.

Perhaps you could fix this too.