Fix win make

setup.py

@@ -10,21 +10,22 @@ import pathlib
 import os
 import sys
 import shutil
-from sys import platform as _platform
 
 BITS = struct.calcsize("P") * 8
 PACKAGE_NAME = "crysfml_api"
 SOURCE_DIR = '.'
+
+def cmd_exists(cmd):
+    return shutil.which(cmd) is not None
+
 COMPILER = 'gfortran'
-# if _platform == "linux" or _platform == "linux2":
-    # linux
-if _platform == "darwin":
-    # MAC OS X
-    COMPILER = 'gfortran-10'
-# elif _platform == "win32":
-#     # Windows
-# elif _platform == "win64":
-#     # Windows 64-bit
+if not cmd_exists(COMPILER):
+    versions = [10, 9, 8]
+    for version in versions:
+        COMPILER = f'gfortran-{version}'
+        if cmd_exists(COMPILER):
+            break
+
 # We can use cmake provided from pip which (normally) gets installed at /bin
 # Except that in the manylinux builds it's placed at /opt/python/[version]/bin/
 # (as a symlink at least) which is *not* on the path.