[CMake] cmake 2.4.1 FIND_PATH

[frederic heem]

Hi,
After switching from 2.2 to 2.4, my application didn't behave correctly, the 
root of the problem is a change in FIND_PATH work. Here one of this:
FIND_PATH(PWLIB_INCLUDE_DIR ptlib.h
  $ENV{PWLIBDIR}/include
  /usr/include
)

cmake always takes /usr/local/include/ptlib.h, which is not the one desired, 
it shall take $ENV{PWLIBDIR}/include/ptlib.h if any
A workaround is to set to have add NO_DEFAULT_PATH like this 

FIND_PATH(PWLIB_INCLUDE_DIR ptlib.h
  $ENV{PWLIBDIR}/include
  /usr/include
  NO_DEFAULT_PATH 
)

Is there any reason why cmake searches first default directory and then user 
defined ones ? It is more logical to have this opposite and it also preserves 
backward compatibility.
Regards.
-- 
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Frederic Heem

Software Designer
R&D - Telsey SpA Telecommunications
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