tools/building.py: more descriptive on error
Print the command that failed to execute and try to tell the reason to fall.
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@ -43,8 +43,9 @@ class Win32Spawn:
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proc = subprocess.Popen(cmdline, env=_e,
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startupinfo=startupinfo, shell=False)
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except Exception as e:
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print 'Error in Popen: %s' % e
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return -1
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print 'Error in calling:\n%s' % cmdline
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print 'Exception: %s: %s' % (e, os.strerror(e.errno))
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return e.errno
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finally:
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os.environ['PATH'] = old_path
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