riscv64, s390x error: ‘aligned_mode’ in namespace ‘xsimd’ does not name a type; did you mean ‘aligned_free’?

[drew-parsons]

xtensor 0.24.7 tests are exposing an error in xsimd 10.0.0 on less common architectures ppc64el and s390x, seen in debian CI tests at https://ci.debian.net/packages/x/xtensor/

Test logs
https://ci.debian.net/data/autopkgtest/unstable/riscv64/x/xtensor/38875117/log.gz
https://ci.debian.net/data/autopkgtest/unstable/s390x/x/xtensor/38875118/log.gz

The same xtensor code is passing on other architectures (arm has other problems), so I guess the problem is in the definitions included via xsimd/xsimd.hpp when xtensor is used with use XTENSOR_USE_XSIMD on these architectures.

The error message on riscv64 is

217s /usr/bin/g++ -DXSIMD_ENABLE_XTL_COMPLEX -DXTENSOR_USE_XSIMD  -DXSIMD_ENABLE_XTL_COMPLEX=1 -std=c++14 -Wunused-parameter -Wextra -Wreorder -Wconversion -Wno-sign-conversion  -Wold-style-cast -Wunused-variable -ftemplate-backtrace-limit=0 -O3 -DNDEBUG -MD -MT CMakeFiles/test_xtensor_lib.dir/test_xarray.cpp.o -MF CMakeFiles/test_xtensor_lib.dir/test_xarray.cpp.o.d -o CMakeFiles/test_xtensor_lib.dir/test_xarray.cpp.o -c /tmp/autopkgtest-lxc.w6l32789/downtmp/autopkgtest_tmp/test_xarray.cpp
223s In file included from /usr/include/xtensor/xstorage.hpp:23,
223s                  from /usr/include/xtensor/xshape.hpp:23,
223s                  from /usr/include/xtensor/xstrides.hpp:21,
223s                  from /usr/include/xtensor/xaccessible.hpp:14,
223s                  from /usr/include/xtensor/xbroadcast.hpp:23,
223s                  from /usr/include/xtensor/xbuilder.hpp:29,
223s                  from /usr/include/xtensor/xmanipulation.hpp:19,
223s                  from /tmp/autopkgtest-lxc.w6l32789/downtmp/autopkgtest_tmp/test_common.hpp:16,
223s                  from /tmp/autopkgtest-lxc.w6l32789/downtmp/autopkgtest_tmp/test_xadaptor_semantic.cpp:10:
223s /usr/include/xtensor/xtensor_simd.hpp:37:33: error: ‘aligned_mode’ in namespace ‘xsimd’ does not name a type; did you mean ‘aligned_free’?
223s    37 |     using aligned_mode = xsimd::aligned_mode;
223s       |                                 ^~~~~~~~~~~~
223s       |                                 aligned_free
223s /usr/include/xtensor/xtensor_simd.hpp:38:35: error: ‘unaligned_mode’ in namespace ‘xsimd’ does not name a type; did you mean ‘aligned_free’?
223s    38 |     using unaligned_mode = xsimd::unaligned_mode;
223s       |                                   ^~~~~~~~~~~~~~
223s       |                                   aligned_free
223s /usr/include/xtensor/xtensor_simd.hpp:41:40: error: ‘allocator_alignment’ in namespace ‘xsimd’ does not name a template type
223s    41 |     using allocator_alignment = xsimd::allocator_alignment<A>;
223s       |                                        ^~~~~~~~~~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:44:42: error: ‘allocator_alignment_t’ in namespace ‘xsimd’ does not name a template type
223s    44 |     using allocator_alignment_t = xsimd::allocator_alignment_t<A>;
223s       |                                          ^~~~~~~~~~~~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:47:40: error: ‘container_alignment’ in namespace ‘xsimd’ does not name a template type
223s    47 |     using container_alignment = xsimd::container_alignment<C>;
223s       |                                        ^~~~~~~~~~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:50:42: error: ‘container_alignment_t’ in namespace ‘xsimd’ does not name a template type
223s    50 |     using container_alignment_t = xsimd::container_alignment_t<C>;
223s       |                                          ^~~~~~~~~~~~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:53:32: error: ‘simd_traits’ in namespace ‘xsimd’ does not name a template type
223s    53 |     using simd_traits = xsimd::simd_traits<T>;
223s       |                                ^~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:56:39: error: ‘revert_simd_traits’ in namespace ‘xsimd’ does not name a template type
223s    56 |     using revert_simd_traits = xsimd::revert_simd_traits<T>;
223s       |                                       ^~~~~~~~~~~~~~~~~~
223s /usr/include/xtensor/xtensor_simd.hpp:59:30: error: ‘simd_type’ in namespace ‘xsimd’ does not name a template type
&c

[serge-sans-paille]

looks like an issue that happens when XSIMD_NO_SUPPORTED_ARCHITECTURE is defined... cc @JohanMabille

[drew-parsons]

armel is also affected, https://ci.debian.net/data/autopkgtest/testing/armel/x/xtensor/38908134/log.gz
Sounds like XSIMD_NO_SUPPORTED_ARCHITECTURE, as you said.

edit: and ppc64el: https://ci.debian.net/data/autopkgtest/unstable/ppc64el/x/xtensor/38949306/log.gz

[JohanMabille]

Indeed, we are missing a bunch of definitions with XSIMD_NO_SUPPORTED_ARCHITECTURE. I am working on a fix, but this is not trivial.