From 207253abc6ec81112abf0a64a8bf68e227528d64 Mon Sep 17 00:00:00 2001
From: Simon John <git@the-jedi.co.uk>
Date: Tue, 4 Aug 2020 23:19:49 +0100
Subject: Rebased python3 branch with some changes from tuna-f1sh@87d5241

---
 Common.mk | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'Common.mk')

diff --git a/Common.mk b/Common.mk
index 0c1f92c..d4fb9c1 100644
--- a/Common.mk
+++ b/Common.mk
@@ -98,3 +98,24 @@ ifeq ($(CURRENT_OS),WINDOWS)
         echo $(error On Windows, ARDUINO_DIR and other defines must use forward slash and not contain spaces, special characters or be cygdrive relative)
     endif
 endif
+
+########################################################################
+# System Python
+
+ifndef PYTHON_CMD
+    # try for Python 3 first
+    PYTHON_CMD := $(shell which python3 2> /dev/null)
+    ifdef PYTHON_CMD
+        $(call show_config_variable,PYTHON_CMD,[AUTODETECTED])
+    else
+        # fall-back to any Python
+        PYTHON_CMD := $(shell which python 2> /dev/null)
+        ifdef PYTHON_CMD
+            $(call show_config_variable,PYTHON_CMD,[AUTODETECTED])
+        else
+            echo $(error "Unable to find system Python! Utility scipts won't work. Override this error by defining PYTHON_CMD")
+        endif
+    endif
+else
+    $(call show_config_variable,PYTHON_CMD,[USER])
+endif
-- 
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