From af3dc0e63efa6ed6f7feae926065a68542090f80 Mon Sep 17 00:00:00 2001
From: Grissiom <chaos.proton@gmail.com>
Date: Sat, 7 Jun 2014 16:46:00 +0800
Subject: [PATCH] tools/building.py: more descriptive on error

Print the command that failed to execute and try to tell the reason to
fall.
---
 tools/building.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/building.py b/tools/building.py
index 726056533f..3572daabbe 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -43,8 +43,9 @@ class Win32Spawn:
             proc = subprocess.Popen(cmdline, env=_e,
                     startupinfo=startupinfo, shell=False)
         except Exception as e:
-            print 'Error in Popen: %s' % e
-            return -1
+            print 'Error in calling:\n%s' % cmdline
+            print 'Exception: %s: %s' % (e, os.strerror(e.errno))
+            return e.errno
         finally:
             os.environ['PATH'] = old_path