title: CMake error with AVR WINAVR compiler
body: <pre><code>The C compiler identification is GNU
  The CXX compiler identification is GNU
  Check for working C compiler: C:/WinAVR-20100110/bin/avr-gcc.exe
  Check for working C compiler: C:/WinAVR-20100110/bin/avr-gcc.exe -- broken
  CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE):
    The C compiler "C:/WinAVR-20100110/bin/avr-gcc.exe" is not able to compile
    a simple test program.
  </code></pre>
  
  <p>It fails with the following output:</p>
  
  <pre><code>   Change Dir: F:/projects/UniRobot/code/navigation/build/CMakeFiles/CMakeTmp
  
  
  
    Run Build Command:C:/PROGRA~1/CMAKE2~1.8/bin/cmake.exe
    "cmTryCompileExec/fast"
  
    CMake Error: The source directory
    "F:/projects/UniRobot/code/navigation/build/CMakeFiles/CMakeTmp/cmTryCompileExec/fast"
    does not exist.
  
    Specify --help for usage, or press the help button on the CMake GUI.
  
      CMake will not be able to correctly generate this project.
  Call Stack (most recent call first):
    CMakeLists.txt:11 (PROJECT)
  </code></pre>
  
  <p>So, Everything is ok under Linux and Win 7, but under XP SP2,SP3 i have this error. It  means that my AVR compiler for controllers is incorrect  and CMake can't provide test program using WINAVR compiler. For the first time running this error was under Win7 too, but after the second running it disapperared. I wrote paths in windows reg. I rewrote paths to compilers, sh and cmake. But the error still take a place.</p>