PyCLBlast fails to build due to clblast_c.h not found

[enzomich]

I'm running on Manjaro-Cinnamon 17.1.4 and have installed CLBlast through its package manager Pamac; the file clblast_c.h is under /usr/include/CLBlast :

$ ls -l /usr/include/CLBlast/clblast_c.h 
-rw-r--r-- 1 root root 131484 Feb 26 16:33 /usr/include/CLBlast/clblast_c.h

However, sudo pip install pyclblast fails because gcc can't find it:

    gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -fPIC -I/usr/include/python3.6m -c src/pyclblast.cpp -o build/temp.linux-x86_64-3.6/src/pyclblast.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
    src/pyclblast.cpp:537:10: fatal error: clblast_c.h: No such file or directory
     #include "clblast_c.h"
              ^~~~~~~~~~~~~
    compilation terminated.
    error: command 'gcc' failed with exit status 1

[CNugteren]

Thanks for reporting. So it seems you've installed CLBlast in a non-default path, but that's maybe the fault of the package manager? What if you copy clblast_c.h into /usr/include instead?

Do you have a reference to the CLBlast package in Pamac? I'm not maintaining that myself, so not sure how to change anything there.

[enzomich]

Hi Cedric,
Thanks for the prompt reply. The installation does complete successfully after creating suitable symbolic links:
sudo ln -s /usr/include/CLBlast/clblast* /usr/include/

The CLBlast package installed by Pamac, clblast-git, is actually sourced not from the Manjaro repository but from AUR, the Arch User Archive (Manjaro is a derivative from the Arch distribution). Here is its page: https://aur.archlinux.org/packages/clblast-git .
Upon registration, from that page it's possible to submit requests to the package maintainer.

[CNugteren]

OK, good to hear, and thanks for the link - I'll add it to the CLBlast README as well.

Alternatively, I can ship a clblast_c.h with the Python package, perhaps that's a better idea? I've seen other cases (e.g. pyclblas) where this is done.

[enzomich]

Alternatively, I can ship a clblast_c.h with the Python package, perhaps that's a better idea? I've seen other cases (e.g. pyclblas) where this is done.

That would work, but then you'd have to keep it aligned with any change in the original clblast_c.h . I'd rather try to persuade the maintainer of the AUR package to place the header files in standard locations...

[Schmetzler]

I changed the PKGBUILD it should now install in the standard location. I had a reason why I put it in this non-standard location, but I forgot it.

[CNugteren]

@Schmetzler Thanks for the quick fix!

@enzomich Can you confirm that this is solved and close the issue if this is indeed the case?

[enzomich]

Yes, I confirm. Thank you @Schmetzler!

[JaniKallankari]

In Windows 10 this error is still present in pip-19.0.2-py2.py3-none-any.whl :

src\pyclblast.cpp(538): fatal error C1083: Cannot open include file: 'clblast_c.h': No such file or directory

Do you have any ideas how to fix this in windows?

[Schmetzler]

In Windows 10 this error is still present in pip-19.0.2-py2.py3-none-any.whl :

src\pyclblast.cpp(538): fatal error C1083: Cannot open include file: 'clblast_c.h': No such file or directory

Do you have any ideas how to fix this in windows?

This seems not like an issue like the original post. I think it is a problem that clblast is not correctly installed or it is not in the path..

I guess this is more or less a windows issue, as in windows the libraries (and header files) are not in a common location but somewhere in the system. My advice is that you should check the installation of clblast first and put the directory -- where the clblast_c.h is located -- to the PATH.

[robotics-dev-0101]

I didn't manage to install the pyclblast in windows I always get this error:

src\pyclblast.cpp(611): fatal error C1083: Cannot open include file: 'clblast_c.h': No such file or directory
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\HostX86\x64\cl.exe' failed with exit status 2

ERROR: Failed building wheel for pyclblast

could anyone help please?

[CNugteren]

But did you indeed install CLBlast itself first? And if so, are the paths properly set as mentioned above? Again, this is unrelated to the original issue.