Compiling kaldi for armv7 on Ubuntu18.04

[www.e...@gmail.com]

I need to compile kaldi on a Cortex-A9 board with armv7l architecture (2 cores, 32bit, Gentoo OS) on an x86_64 (8 cores, 64bit) machine running Ubuntu18.04.

I tried to compile, but the error occurred already at the compilation stage of OpenBLAS. Launched with the command:
make -C OpenBLAS ONLY_CBLAS = 1 TARGET = "ARMV7" HOSTCC = gcc USE_LOCKING = 1 USE_THREAD = 0 NUM_THREADS = 32 all

Error:
ar: `u 'modifier ignored since` D' is the default (see `U ')
ar: sgemm_kernel.o: No such file or directory
../Makefile.tail:40: recipe for target 'libs' failed
make [1]: *** [libs] Error 1
make [1]: Leaving directory '/ home / *** / kaldi-master / tools / OpenBLAS / kernel'
Makefile: 149: recipe for target 'libs' failed
make: *** [libs] Error 1
make: Leaving directory '/ home / *** / kaldi-master / tools / OpenBLAS'


On the board itself, it is impossible to compile due to lack of RAM (at the stage of executing the "make -j 1" command, a fatal error appears in the tools / folder).
Maybe someone came across a similar question?

[Daniel Povey]

Remember that OpenBLAS is not the only choice for BLAS library.

Our compilation with OpenBLAS+Arm may not have been tested, you may have to look upstream.

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[www.e...@gmail.com]

As a result of my experiments, I can say that OpenBLAS compiles correctly on the arm architecture (at least the OpenBLAS and clapack compilation stage is successful to the end). The only problem is that I cannot continue compiling the following libraries (cub, openfst ...) on the board , since I run into a lack of memory when starting even with one processor.
Thus, I assume that the whole problem in the fact that I somehow incorrectly start the generation of OpenBLAS on my main computer for the arm architecture, since the error appears.

четверг, 14 января 2021 г. в 13:46:46 UTC+3, Dan Povey:

[Daniel Povey]

It should be possible to cross-compile.  I'm afraid I am not very familiar with cross-compilation issues myself, although the `configure` script does support it.

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[Jan Trmal]

For one undisclosed project of mine, I used this: 

https://github.com/dockcross/dockcross

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[Эрнест Касимов]

Thank you! I'll try it soon.

чт, 14 янв. 2021 г. в 16:26, Jan Trmal <jtr...@gmail.com>:

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[Ho Yin Chan]

You need cross compiler e.g. GNU Arm Embedded Toolchain