title: scons: warning: Calling missing SConscript without error is deprecated
body: <p>I am trying to build a simple printing HelloWorld using the scons build tool.</p>
  
  <p>My helloWorld.c file contains:</p>
  
  <pre><code>#include "stdio.h"
  int main()
  {
  printf("Hello, world!\n");
  }
  </code></pre>
  
  <p>My SConstruct contains:</p>
  
  <pre><code>Program(["helloWorld.c"])
  </code></pre>
  
  <p>When I run scons, I get result as following but no executable output:</p>
  
  <p>PS D:\01_code> scons -f SCOnstruct
  scons: Reading SConscript files ...</p>
  
  <p>scons: warning: Calling missing SConscript without error is deprecated.
  Transition by adding must_exist=0 to SConscript calls.
  Missing SConscript 'SCOnstruct'
  File "C:\Python27\Scripts\scons", line 204, in 
  scons: done reading SConscript files.
  scons: Building targets ...
  scons: `.' is up to date.
  scons: done building targets.
  PS D:\01_code></p>
  
  <p>My aim is to learn the scons build tool.
  i have Windows 10, Python 27, latest scons</p>