Avoid using wrong compiler command on Windows

Author: vepadulano

bindings/pyroot/pythonizations/python/ROOT/__init__.py

@@ -15,20 +15,22 @@
 import subprocess
 import textwrap
 
-try:
-    # Mimic what cling does to find standard headers include path
-    cmd = shlex.split('c++ -xc++ -E -v /dev/null')
-    env = os.environ
-    env.update({'LC_ALL': 'C'})
-    subprocess.run(cmd, env=env, check=True,
-                   stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
-except Exception as e:
-    msg = (
-        "Could not find a C++ compiler when importing ROOT. Make sure a C++ compiler as well as the C++ standard "
-        "libraries are installed. For example, run `[apt,dnf] install g++` or follow similar instructions for your "
-        "distribution. For more info, visit https://root.cern/install/dependencies"
-    )
-    raise ImportError(textwrap.fill(msg, width=80)) from e
+import platform
+if platform.system() != "Windows":
+    try:
+        # Mimic what cling does to find standard headers include path
+        cmd = shlex.split('c++ -xc++ -E -v /dev/null')
+        env = os.environ
+        env.update({'LC_ALL': 'C'})
+        subprocess.run(cmd, env=env, check=True,
+                    stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+    except Exception as e:
+        msg = (
+            "Could not find a C++ compiler when importing ROOT. Make sure a C++ compiler as well as the C++ standard "
+            "libraries are installed. For example, run `[apt,dnf] install g++` or follow similar instructions for your "
+            "distribution. For more info, visit https://root.cern/install/dependencies"
+        )
+        raise ImportError(textwrap.fill(msg, width=80)) from e
 
 # Prevent cppyy's check for the PCH
 os.environ["CLING_STANDARD_PCH"] = "none"