CUDA and PyCUDA on ppc64el

[Tomasz Rybak]

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Hello everyone.
Playing a bit with PyCUDA packaging while trying to polish it
before upload I tried to build ppc64el package.
nvidia-cuda-toolkit is available for this architecture, so PyCUDA
should work with it.

I used sbuild with qemu to build it, prepared using:
$ sbuild-createchroot --arch=ppc64el --include=eatmydata,ccache,gnupg
- --components=main,contrib,non-free --chroot-suffix=-nonfree-sbuild
- --debootstrap=qemu-debootstrap
unstable /srv/chroot/unstable-ppc64el-nonfree-sbuild

I got an error during final linking:

powerpc64le-linux-gnu-g++ -pthread -shared -Wl,-Bsymbolic-functions
- -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall
- -Wstrict-prototypes -Wdate-time -D_FORTIFY_SOURCE=2 -g -fdebug-prefix-
map=/build/python2.7-2SyfSZ/python2.7-2.7.15=. -fstack-protector-strong
- -Wformat -Werror=format-security -fexceptions -Wl,-z,relro -Wl,-z,now -g
- -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong
- -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2
build/temp.linux-ppc64el-2.7/src/cpp/cuda.o build/temp.linux-ppc64el-
2.7/src/cpp/bitlog.o build/temp.linux-ppc64el-
2.7/src/wrapper/wrap_cudadrv.o build/temp.linux-ppc64el-
2.7/src/wrapper/mempool.o build/temp.linux-ppc64el-
2.7/src/wrapper/wrap_cudagl.o build/temp.linux-ppc64el-
2.7/src/wrapper/wrap_curand.o -L/usr/lib/stubs -L/usr/lib64/stubs
- -L/usr/lib/stubs -L/usr/lib64/stubs -lboost_python27 -lboost_thread
- -lcuda -lcurand -o
/<<PKGBUILDDIR>>/.pybuild/cpython2_2.7/build/pycuda/_driver.so
/usr/bin/ld: cannot find -lcuda
collect2: error: ld returned 1 exit status
error: command 'powerpc64le-linux-gnu-g++' failed with exit status 1
E: pybuild pybuild:338: build: plugin distutils failed with: exit
code=1: /usr/bin/python setup.py build 
dh_auto_build: pybuild --build -i python{version} -p 2.7 returned exit
code 13
make: *** [debian/rules:34: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit
status 2

It looks like there is no libcuda.so for ppc64el. This file is
in libcuda1, which is only available for armhf, amd64, and i386.

Has anybody tried (or succeeded) runing CUDA on ppc64el?
When I look at transition page, I can see packages only for amd64.

I'll also ask this question on PyCUDA mailing list, but wanted
to coordinate here, as this touched Debian packaging.

Best regards.

- -- 
Tomasz Rybak, Debian Developer <serpent at debian.org>
GPG: A565 CE64 F866 A258 4DDC F9C7 ECB7 3E37 E887 AA8C
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