fixed conditionals for platform detection

Author: drebbe-intrepid

setup.py

@@ -81,14 +81,22 @@ def run(self):
     'src/ice/src/ice_library.cpp'
 ]
 
+# gcc and clang arguments
+gcc_compile_args = [
+    '-fpermissive',
+    '-Wno-unused-variable',
+    '-Wno-unused-function',
+    '-Wno-write-strings',
+]
+
 # Set compiler flags here
-if 'LINUX' in platform.system().upper() or "MSC" not in sys.version:
-    compile_args = [
-        '-fpermissive',
-        '-Wno-unused-variable',
-        '-Wno-unused-function',
-        '-Wno-write-strings',
-    ]
+if 'WINDOWS' in platform.system().upper():
+    compile_args = []
+    # mingw and clang python builds won't have MSC in the version string
+    if "MSC" not in sys.version:
+        compile_args = gcc_compile_args
+elif 'LINUX' in platform.system().upper():
+    compile_args = gcc_compile_args
 elif 'DARWIN' in platform.system().upper():
     # Mac doesn't respect the compiler args, but will append with ARCHFLAGS environment variable
     os.environ['ARCHFLAGS'] = '-std=c++17'