[Openmp-dev] Loading RTLs for other architectures

[Lukas Sommer via Openmp-dev]

Hi Itaru,

as far as I can tell, libomptarget only tries to load these libraries,
but will not actually load them, because they are not present on your
system. The RTLs for the architectures other than CUDA and POWER are not
built during compilation of libomptarget.

If you still want to get rid of this behavior, you can probably remove
the other RTLs from

> static const char *RTLNames[] = ...
in line 24ff. in file /openmp/libomptarget/src/rtl.cpp and stop
libomptarget from trying to load this libraries.

Best,

Lukas

Lukas Sommer, M.Sc.
TU Darmstadt
Embedded Systems and Applications Group (ESA)
Hochschulstr. 10, 64289 Darmstadt, Germany
Phone: +49 6151 1622429
www.esa.informatik.tu-darmstadt.de

On 11/7/19 5:14 AM, Itaru Kitayama via Openmp-dev wrote:
> Hi,
> Is there a way to avoid loading RTLs for aarch64 and x86_64, as I am
> executing my app on PowerPC?
>
> [...]
> Libomptarget --> Loading RTLs...
> Libomptarget --> Loading library 'libomptarget.rtl.ppc64.so
> <http://libomptarget.rtl.ppc64.so>'...
> Libomptarget --> Successfully loaded library
> 'libomptarget.rtl.ppc64.so <http://libomptarget.rtl.ppc64.so>'!
> Libomptarget --> Registering RTL libomptarget.rtl.ppc64.so
> <http://libomptarget.rtl.ppc64.so> supporting 4 devices!
> Libomptarget --> Loading library 'libomptarget.rtl.x86_64.so
> <http://libomptarget.rtl.x86_64.so>'...
> Libomptarget --> Unable to load library 'libomptarget.rtl.x86_64.so
> <http://libomptarget.rtl.x86_64.so>': libomptarget.rtl.x86_64.so
> <http://libomptarget.rtl.x86_64.so>: cannot open shared object file:
> No such file or directory!
> Libomptarget --> Loading library 'libomptarget.rtl.cuda.so
> <http://libomptarget.rtl.cuda.so>'...
> Target CUDA RTL --> Start initializing CUDA
> ==82963== NVPROF is profiling process 82963, command:
> /p/project/cpcp0/pcp0151/opt/nest-clang-offload/bin/nest debug.sli
> Libomptarget --> Successfully loaded library 'libomptarget.rtl.cuda.so
> <http://libomptarget.rtl.cuda.so>'!
> Libomptarget --> Registering RTL libomptarget.rtl.cuda.so
> <http://libomptarget.rtl.cuda.so> supporting 1 devices!
> Libomptarget --> Loading library 'libomptarget.rtl.aarch64.so
> <http://libomptarget.rtl.aarch64.so>'...
> Libomptarget --> Unable to load library 'libomptarget.rtl.aarch64.so
> <http://libomptarget.rtl.aarch64.so>': libomptarget.rtl.aarch64.so
> <http://libomptarget.rtl.aarch64.so>: cannot open shared object file:
> No such file or directory!
> Libomptarget --> RTLs loaded!
> [...]
>
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