On 24/05/2025 10:29, Peter Dyballa wrote:
Am 24.05.2025 um 01:37 schrieb Pádraig Brady <p...@draigbrady.com>: I suspect the following will avoid the issue:It does not: /usr/bin/clang -I. -I./lib -Ilib -I./lib -Isrc -I./src -I/opt/local/include -mavx -mpclmul -Wno-format-extra-args -Wno-tautological-constant-out-of-range-compare -pipe -Os -arch x86_64 -MT src/libcksum_pclmul_a-cksum_pclmul.o -MD -MP -MF src/.deps/libcksum_pclmul_a-cksum_pclmul.Tpo -c -o src/libcksum_pclmul_a-cksum_pclmul.o `test -f 'src/cksum_pclmul.c' || echo './'`src/cksum_pclmul.c src/cksum.c:190:30: error: invalid cpu feature string for builtin bool avx512_enabled = (0 < __builtin_cpu_supports ("vpclmulqdq") ^ ~~~~~~~~~~~~ 1 error generated. make[2]: *** [src/cksum-cksum.o] Error 1 I then set GCC 14 as compiler to build (instead of Clang 17.0.6). The result is: mv -f src/.deps/libcksum_avx2_a-cksum_avx2.Tpo src/.deps/libcksum_avx2_a-cksum_avx2.Po depbase=`echo src/ls-dir.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\ /opt/local/bin/gcc-mp-14 -I. -I./lib -Ilib -I./lib -Isrc -I./src -I/opt/local/include -pipe -Os -arch x86_64 -MT src/ls-dir.o -MD -MP -MF $depbase.Tpo -c -o src/ls-dir.o src/ls-dir.c &&\ mv -f $depbase.Tpo $depbase.Po <stdin>:59:2: error: instruction requires: AVX-512 ISA vmovdqa64 lC0(%rip), %zmm0 ^
It seems like you may have a mismatch between compiler (flags) used at configure time and build time. These must match so that code upsupported by your build is not enabled. I'm surprised USE_AVX512_CRC32 is defined at all for you during your build? thanks, Pádraig
