Control: severity -1 serious On Mon, Jul 20, 2026 at 07:57:43PM -0400, Lennart Sorensen wrote: > On Mon, Jul 20, 2026 at 07:43:03PM -0400, wrote: > > pinsrq is an SSE4.1 instruction. Debian amd64 is not supposed to require > > those, so probably numpy needs to be told explicitly at compile time to > > stick with SSE2. > > Building numpy on my machine I see: > > -DNPY_HAVE_X86_V2 -DNPY_HAVE_SSE -DNPY_HAVE_SSE2 -DNPY_HAVE_SSE3 > -DNPY_HAVE_SSSE3 -DNPY_HAVE_SSE41 -DNPY_HAVE_SSE42 -DNPY_HAVE_POPCNT > -DNPY_HAVE_LAHF -DNPY_HAVE_CX16 -DNPY_HAVE_X86_V3 -DNPY_HAVE_AVX > -DNPY_HAVE_AVX2 -DNPY_HAVE_FMA3 -DNPY_HAVE_BMI -DNPY_HAVE_BMI2 > -DNPY_HAVE_LZCNT -DNPY_HAVE_F16C -DNPY_HAVE_MOVBE -DNPY_HAVE_X86_V4 > -DNPY_HAVE_AVX512F -DNPY_HAVE_AVX512CD -DNPY_HAVE_AVX512VL > -DNPY_HAVE_AVX512BW -DNPY_HAVE_AVX512DQ -DNPY_HAVE_AVX512_SKX > -DNPY_HAVE_AVX512F_REDUCE -DNPY_HAVE_AVX512BW_MASK -DNPY_HAVE_AVX512DQ_MASK > -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mpopcnt -msahf -mcx16 > -DHWY_WANT_SSE4 -DHWY_DISABLE_PCLMUL_AES -mavx -mavx2 -mfma -mbmi -mbmi2 > -mlzcnt -mf16c -mmovbe -mavx512f -mavx512cd -mavx512vl -mavx512bw -mavx512dq > -DNPY_MTARGETS_CURRENT=X86_V4 > > So that looks problematic. > > Numpy 2.4.0 raised the default baseline to X86_V2 [..]
This is a baseline violation for Debian purposes. Either numpy needs to build without the new instructions, or it needs to add runtime CPU feature detection. Best, Chris
