fix: update CMake minimum version and Python target references

Author: fbriol

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.19)
 
 # ##############################################################################
 # Import CMake modules
@@ -272,36 +272,11 @@ endif()
 
 # Python
 find_package(
-  Python3
+  Python
   COMPONENTS Interpreter Development.Module
+  OPTIONAL_COMPONENTS Development.SABIModule
   REQUIRED)
-include_directories(SYSTEM PRIVATE ${Python3_INCLUDE_DIRS})
-
-# Ensure Python::Interpreter target exists (needed by nanobind to avoid
-# re-resolving a different Python interpreter).
-if(NOT TARGET Python::Interpreter)
-  add_executable(Python::Interpreter IMPORTED)
-  # cmake-format: off
-  set_target_properties(Python::Interpreter PROPERTIES
-                        IMPORTED_LOCATION "${Python3_EXECUTABLE}")
-  # cmake-format: on
-endif()
-
-# Ensure Python::Module target exists (needed for nanobind on Windows)
-if(NOT TARGET Python::Module)
-  if(NOT TARGET Python::Python)
-    add_library(Python::Python INTERFACE IMPORTED)
-    set_target_properties(
-      Python::Python
-      PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${Python3_INCLUDE_DIRS}"
-                 INTERFACE_LINK_LIBRARIES "${Python3_LIBRARIES}")
-  endif()
-  add_library(Python::Module INTERFACE IMPORTED)
-  # cmake-format: off
-  set_target_properties(
-    Python::Module PROPERTIES INTERFACE_LINK_LIBRARIES "Python::Python")
-  # cmake-format: on
-endif()
+include_directories(SYSTEM PRIVATE ${Python_INCLUDE_DIRS})
 
 # BLAS
 #
@@ -560,7 +535,7 @@ set(CONFIG_LINES
     "BLAS:                   ${BLA_VENDOR}"
     "Code Coverage:          ${CODE_COVERAGE_LINE}"
     "Clang-Tidy:             ${CLANG_TIDY_LINE}"
-    "Python3:                ${Python3_VERSION}"
+    "Python:                 ${Python_VERSION}"
     "======================================================================")
 
 foreach(line ${CONFIG_LINES})

setup.py

@@ -343,7 +343,7 @@ def build_cmake(self, ext: CMakeExtension) -> None:
         cmake_args: list[str] = [
             "-DCMAKE_BUILD_TYPE=" + cfg,
             "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
-            "-DPython3_EXECUTABLE=" + sys.executable,
+            "-DPython_EXECUTABLE=" + sys.executable,
             *self.set_cmake_user_options(),
         ]
         build_args = ["--config", cfg]