Drop distutils

Allows to use Python 3.12

setup.py

@@ -15,20 +15,13 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import distutils
+from setuptools import setup
 import os
 import shutil
 import numpy as np
 import ctypes.util
 import sys
 
-#If prefix is set, we want to allow installation in a directory that is not on PYTHONPATH
-#and this is only possible with distutils, not setuptools
-if str(sys.argv[1:]).find("--prefix") == -1:
-    from setuptools import setup  
-else:
-    from distutils.core import setup
-
 try:
     from Cython.Distutils import build_ext
     from Cython.Build import cythonize
@@ -104,7 +97,6 @@
 copy_gcc_lib = False
 gcc_lib = None
 force_32bit = False
-no_msvcr = False
 with_openmp = False
 
 static_link_gcc = "-static-libgcc"
@@ -113,8 +105,6 @@
 
 # Fix path sep
 for x in sys.argv[1:]:
-    if not x.find('--prefix'):
-        copy_args[copy_args.index(x)] = x.replace('/',os.sep)
     if not x.find('--fmil-home'):
         incdirs = os.path.join(x[12:],'include')
         libdirs = os.path.join(x[12:],'lib')
@@ -134,10 +124,6 @@
         if x[14:].upper() == "TRUE":
             force_32bit = True
         copy_args.remove(x)
-    if not x.find('--no-msvcr'):
-        if x[11:].upper() == "TRUE":
-            no_msvcr = True
-        copy_args.remove(x)
     if not x.find('--extra-c-flags'):
         extra_c_flags = x[16:]
         copy_args.remove(x)
@@ -178,14 +164,6 @@
                 shutil.copy2(path_gcc_lib,os.path.join(".","src","pyfmi"))
                 gcc_lib = os.path.join(".","src","pyfmi","libgcc_s_dw2-1.dll")
 
-if no_msvcr:
-    # prevent the MSVCR* being added to the DLLs passed to the linker
-    def msvc_runtime_library_mod(): 
-        return None
-
-    import numpy.distutils
-    numpy.distutils.misc_util.msvc_runtime_library = msvc_runtime_library_mod
-
 def check_extensions():
     ext_list = []
     extra_link_flags = []
@@ -308,7 +286,6 @@ def check_extensions():
 extra_package_data = ['*fmilib_shared*'] if sys.platform.startswith("win") else []
 extra_package_data += ['libgcc_s_dw2-1.dll'] if copy_gcc_lib else []
 
-from numpy.distutils.core import setup
 setup(name=NAME,
       version=VERSION,
       license=LICENSE,