add 'import setuptools' for python 3.13

Author: bjodah

cmake/FindCython.cmake

@@ -12,11 +12,13 @@ SET(Cython_FOUND FALSE)
 IF (CYTHON_BIN)
     # Try to run Cython, to make sure it works:
     execute_process(
-        COMMAND ${CYTHON_BIN} ${CYTHON_FLAGS} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/cython_test.pyx
+        COMMAND bash -c "set -xe; ${CYTHON_BIN} ${CYTHON_FLAGS} ${CMAKE_CURRENT_SOURCE_DIR}/cython_test.pyx"
         RESULT_VARIABLE CYTHON_RESULT
         OUTPUT_VARIABLE CYTHON_OUTPUT
         ERROR_VARIABLE CYTHON_ERROR
-        )
+    )
+    MESSAGE(STATUS "CYTHON_RESULT: ${CYTHON_RESULT}")
+    MESSAGE(STATUS "CYTHON_RESULT: ${CYTHON_RESULT}")
     if (CYTHON_RESULT EQUAL 0)
         # Only if cython exits with the return code 0, we know that all is ok:
         SET(Cython_FOUND TRUE)

cmake/FindPython.cmake

@@ -1,7 +1,7 @@
 set(PYTHON_BIN python CACHE STRING "Python executable name")
 
 execute_process(
-	COMMAND ${PYTHON_BIN} -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())"
+	COMMAND ${PYTHON_BIN} -c "import setuptools; from distutils.sysconfig import get_python_inc; print(get_python_inc())"
 	OUTPUT_VARIABLE PYTHON_SYS_PATH
 	)
 string(STRIP ${PYTHON_SYS_PATH} PYTHON_SYS_PATH)
@@ -16,7 +16,7 @@ set(PYTHON_INSTALL_HEADER_PATH ${PYTHON_INCLUDE_PATH}/symengine
     CACHE BOOL "Python install headers path")
 
 execute_process(
-	COMMAND ${PYTHON_BIN} -c "from distutils.sysconfig import get_config_var; print(get_config_var('LIBDIR'))"
+	COMMAND ${PYTHON_BIN} -c "import setuptools; from distutils.sysconfig import get_config_var; print(get_config_var('LIBDIR'))"
 	OUTPUT_VARIABLE PYTHON_LIB_PATH
 	)
 string(STRIP ${PYTHON_LIB_PATH} PYTHON_LIB_PATH)
@@ -50,7 +50,7 @@ if (${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
 endif()
 
 execute_process(
-	COMMAND ${PYTHON_BIN} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"
+	COMMAND ${PYTHON_BIN} -c "import setuptools; from distutils.sysconfig import get_python_lib; print(get_python_lib())"
 	OUTPUT_VARIABLE PYTHON_INSTALL_PATH_tmp
 	)
 string(STRIP ${PYTHON_INSTALL_PATH_tmp} PYTHON_INSTALL_PATH_tmp)

cmake/get_suffix.py

@@ -1,4 +1,4 @@
-from distutils.sysconfig import get_config_var
+import setuptools; from distutils.sysconfig import get_config_var
 extsuffix = get_config_var('EXT_SUFFIX')
 if extsuffix is None:
     print("")