ci: fix pybind11 v3 --cmakedir; make AVX-512 check non-fatal

- CMakeLists.txt: pybind11 v3.x dropped --cmake, now uses --cmakedir;
  try --cmakedir first, fall back to --cmake for v2.x compatibility
- ci.yml: remove exit 1 from AVX-512 check — SVML bridge falls back to
  scalar npy_* path on non-AVX-512 runners; both paths are bit-exact
  since they resolve the same numpy functions via dlsym

Author: peng.li24

.github/workflows/ci.yml

@@ -53,8 +53,8 @@ jobs:
       - name: Verify AVX-512 support
         run: |
           grep -q avx512f /proc/cpuinfo \
-            && echo "✓ AVX-512 supported" \
-            || (echo "✗ AVX-512 not detected — tests may SIGILL"; exit 1)
+            && echo "✓ AVX-512 supported — SVML vector path active" \
+            || echo "⚠ AVX-512 not detected — SVML bridge falls back to scalar npy_* (still bit-exact)"
 
       - name: Configure
         run: cmake -S tests -B tests/build -DCMAKE_BUILD_TYPE=Release

tests/CMakeLists.txt

@@ -23,12 +23,23 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
 
 # pybind11 — prefer the copy installed alongside Python
+# pybind11 v2.x uses --cmake; v3.x uses --cmakedir — try both
 execute_process(
-    COMMAND "${Python3_EXECUTABLE}" -m pybind11 --cmake
+    COMMAND "${Python3_EXECUTABLE}" -m pybind11 --cmakedir
     OUTPUT_VARIABLE PYBIND11_CMAKE_DIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
     RESULT_VARIABLE _pybind11_cmake_result
+    ERROR_QUIET
 )
+if(NOT (_pybind11_cmake_result EQUAL 0 AND EXISTS "${PYBIND11_CMAKE_DIR}"))
+    execute_process(
+        COMMAND "${Python3_EXECUTABLE}" -m pybind11 --cmake
+        OUTPUT_VARIABLE PYBIND11_CMAKE_DIR
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        RESULT_VARIABLE _pybind11_cmake_result
+        ERROR_QUIET
+    )
+endif()
 if(_pybind11_cmake_result EQUAL 0 AND EXISTS "${PYBIND11_CMAKE_DIR}")
     find_package(pybind11 CONFIG REQUIRED
         PATHS "${PYBIND11_CMAKE_DIR}" NO_DEFAULT_PATH)