capnp missing include path

[breznak]

when running python setup.py build --cmake_options="-DNUPIC_CORE=/my/nupiccore/release"

I had a successful built of both nupic & nupic.core, but python setup.py develop fails with

Installed /home/mmm/nupic/nupic-source
Processing dependencies for nupic==0.0.26-dev
Searching for pycapnp==0.5.1
Reading https://pypi.python.org/simple/pycapnp/
Best match: pycapnp 0.5.1
Downloading https://pypi.python.org/packages/source/p/pycapnp/pycapnp-0.5.1.tar.gz#md5=526534727701677b7552febdedfc0482
Processing pycapnp-0.5.1.tar.gz
Writing /tmp/easy_install-0w_uAE/pycapnp-0.5.1/setup.cfg
Running pycapnp-0.5.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-0w_uAE/pycapnp-0.5.1/egg-dist-tmp-X7wf1w
/tmp/easy_install-0w_uAE/pycapnp-0.5.1/temp/tmpT7FLBW/tmp/easy_install-0w_uAE/pycapnp-0.5.1/temp/timer_create0kVOmo.o: In function `main':
timer_create0kVOmo.c:(.text+0x15): undefined reference to `timer_create'
collect2: error: ld returned 1 exit status
/tmp/easy_install-0w_uAE/pycapnp-0.5.1/temp/tmpT7FLBW/vers.cpp:4:26: fatal error: capnp/common.h: No such file or directory
 #include "capnp/common.h"
                          ^
compilation terminated.
*WARNING* no libcapnp detected. Will download and build it from source now. If you have C++ Cap'n Proto installed, it may be out of date or is not being detected. Downloading and building libcapnp may take a while.
fetching https://capnproto.org/capnproto-c++-0.5.0.tar.gz into /tmp/easy_install-0w_uAE/pycapnp-0.5.1/bundled
error: Setup script exited with error: [Errno 13] Permission denied
(env_py)mmm@mmm-U2442:~/nupic/nupic-source$ git pull
Already up-to-date.
(env_py)mmm@mmm-U2442:~/nupic/nupic-source$ find . -name common.h
./extensions/core/external/common/include/capnp/common.h
./extensions/core/external/common/include/kj/common.h
./extensions/core/external/common/include/kj/parse/common.h

[breznak]

CC @scottpurdy

[scottpurdy]

@breznak - it looks like the error happens when pycapnp is being installed via pip. It should be able to do this without any prebuilt Cap'n Proto files. So I don't think this is an includes issue but rather a permissions issue. pip is trying to use a /tmp path that it doesn't have permissions for.

[breznak]

@scottpurdy you're right! Seems like a bug in pip package/ubuntu - the tmp/tmpXXXX dir pip mentions is not even created (/tmp has normal 1777 permissions).
Workaround was to pip install pycapnp manually, it failed with same err, but pip fallbacked to some alternative install method and finished OK.

[rhyolight]

Is there any action to be taken?

[breznak]

@rhyolight I dont know..maybe notify pycapnp upstream..? or point people who encounter the problem here for workaround.

[rhyolight]

@scottpurdy Can you create an issue on pycapnp and I'll update the developer FAQ with this issue.

[ghost]

pip install pycapnp --install-option '--force-bundled-libcapnp'

[rhyolight]

@kyle-sorensen

pip install pycapnp --install-option '--force-bundled-libcapnp'

Thanks for the tip. I did not know that option existed.